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Rating is 4.9 out of 5.
4.9/5
based on 1,535 client reviews
  2. Development & IT Talent
  3. Network Administrators
  4. (Current) VPN Specialists
  • $150 hourly

    • 5.0/5
    • (59 jobs)
    Versed in a wide-range of IT topics including, but not limited to: - Enterprise Network Monitoring with Zabbix - Network security/implementation utilizing FortiGate/FortiManager/FortiEMS/FortiAnalyzer/FortiAP/FortiSwitch (NSE 4, NSE 5, NSE 7 Certified) - IPSec/SSL VPN - AWS Site-2-Site VPN I have a passion for learning new things and solving Information Technology challenges. The majority of my career experience has been as a Network Security Engineer for a managed security service provider for the financial industry in the United States.
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    OSPF
    Zabbix
    Fortinet
    Linux
    Network Equipment
    C#
    Network Monitoring
    Firewall
    Internet Protocol Security
  • $95 hourly

    • 5.0/5
    • (34 jobs)
    A result-driven Senior Network Professional with over 15 years' experience in Routing, Switching, Security and Network Design for corporate and enterprise networks.
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    Computer Network
    Virtual LAN
    Amazon Web Services
    Cisco Meraki
    Network Equipment
    Ubiquiti
    Network Design
    Network Engineering
    Palo Alto Firewalls
    Cisco Router
    Fortinet
    Mikrotik RouterBOARD
    Firewall
    Cisco ASA
  • $40 hourly

    • 4.8/5
    • (261 jobs)
    Highly motivated and results-oriented IT professional with 17+ years of experience in managing and maintaining complex IT infrastructures across diverse environments, including Linux/Windows, databases, networks, and security. Proven expertise in cloud computing, with 12+ years of hands-on experience on AWS, Azure, and Google Cloud, specializing in infrastructure design, deployment, and management. Key Skills Cloud Computing: AWS, Azure, Google Cloud (IaaS, PaaS, SaaS), Cloud Migration, Cloud Security, Cost Optimization Cloud Security: DDoS Mitigation, Firewalls (Layer 3/4, Layer 7), Security Audits (ISO, SOC2, GDPR, HIPAA), Secure Infrastructure Design Identity & Access Management: Entra ID / Azure Active Directory (IAM, PIM, Access Packages, Access Reviews, Conditional Access, RBAC, B2B, B2C, External Identity, Entra ID Protection) Containerization: Docker, Kubernetes (AKS, EKS, GKE) Infrastructure Monitoring: Zabbix, Nagios, Newrelic, DataDog Server Administration: RedHat, CentOS, Ubuntu, Windows Server Networking: TCP/IP, Routing, Switching, VPN, Load Balancing Database Administration: SQL Server, MySQL, PostgreSQL Security Certifications: RedHat Certified Engineer, Office 365 Security Administrator, Azure Certified Cloud Architect VPN Solution: Site-to-Site VPN, Point to site VPN (Azure,AWS and GCP) CDN Solutions: AWS Cloudfront, Azure CDN, Frontdoor, Cloudflare, Akamai
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    Docker
    Azure DevOps
    Network Security
    Git
    Windows Administration
    Security Infrastructure
    CI/CD
    Linux System Administration
    AWS Server Migration
    DevOps Engineering
    Project Management
    Cloud Engineering Consultation
    Microsoft Azure
  • $59 hourly

    • 5.0/5
    • (90 jobs)
    Am a CCIE#26611 with extensive experience in Routing & Switching, Security, Datacenter, Virtualization, Programmability & Automation. Am delivering unique & absolutely different service for the below technologies: * SDN Datacenter: Cisco ACI, VMware NSX, Nutanix Flow, Arista. * SDN Storage: Cisco HyperFlex, Nutanix HCI, VMware VSAN. * SDN Access: Cisco DNA, LISP Implementation, Cisco Spaces, Cisco ISE, PacketFence. * SDN WAN: Cisco SDWAN, VMware VeloCloud, SilverPeak, PaloAlto SDWAN, FortiGate SDWAN, Meraki. * Programmability & Automation Controllers: Python & API tools to automate business intent & workflows within networks, Ansible, Chef, NSO, Terraform, OpenShift. * Monitoring Applications: Zabbix, SolarWinds, Home Made Custom Tools, Nmap, Packet Tracer (Wireshark), Splunk. * Routing & Switching and Wireless Technologies: Cisco, Mikrotik, Juniper, FS, Arista. * Security: Cisco, PaloAlto, Meraki, FortiNet, Ubiquiti, VMware MDM, Infoblox. * Datacenter, Cloud Computing, Cloud Native, Virtualization & HCI Solutions. * Public Cloud: Design, Setup & Administer Tenants on AWS, Azure. * Micro-segmentation & Containerized Applications: Docker, Kubernetes. * API Gateways & Swagger Documentation. * Python Scripting for DevOps, SecOps, NetOps & IaC. * Technical Writing & Documentation. Please refer to my LinkedIn account aossama. Certifications: * CCIE Enterprise CCIE#26611. * Cisco CCNP DevNet. * Cisco CCNP Enterprise. * Cisco CCNP Datacenter. * Cisco ACI Certified Specialist.
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    Server & Virtualization Software
    Fortinet
    MikroTik
    Cisco Meraki
    Network Security
    Palo Alto Firewalls
    Network Design
    Network Monitoring
    Network Engineering
    Python
    Information Technology
    Cisco Certified Internetwork Expert
    Cisco ACI
    Software-Defined Networking
    Cisco
  • $45 hourly

    • 4.9/5
    • (73 jobs)
    I'm network and VOIP engineer with 11 years of experience. Over time I've completed the following certificates: 1. CCNA 2. CCNA security 3. CCNA wireless 4. CCNP - Not certified yet 5. MTCNA 6. MTCRE 7. Linux Essentials 8. LPIC-1 9. Sophos UTM Engineer 10. dCAA 11. 3CX I have experience with the following vendors: Cisco MikroTIK Sophos UTM Fortinet Checkpoint HP Ubiquiti - Unifi Juniper Alied Telesis PfSense I can help you with: Router configuration WAN Failover VPNs - IPSec, L2TP, OpenVPN etc... Routing - Static, Dynamic including OSPF and BGP MPLS - L3VPN IPSec Firewall - Filter rules, mangle rules etc... FHRP VRF QoS Switch configuration Vlans FHRP Etherchannel Port security Voice Vlan Trunks Troubleshooting Wireless configuration Cisco WLC and LWAPs Ubiquity Unifi - AP, Switch, USG MikroTIK - I have probably configured 500+ MikroTIK devices VOIP 3CX PBX deployment on prem and in cloud Phone management SIP Trunk management DID management IVR Queues Ring Groups etc... Email security Sophos UTM email filter Spam Titan email filter DNS - SPF, DKIM, DMARC Reach out if you find this interesting and we can discuss the details about your project.
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    3CX
    PfSense
    Cisco Router
    Mikrotik RouterBOARD
    Cisco Certified Network Associate
    Sophos Sophos UTM
    Cisco Certified Network Professional
    Linux System Administration
    MikroTik RouterOS
    Network Administration
    MikroTik
    Network Design
    VoIP
    Ubiquiti
  • $50 hourly

    • 4.0/5
    • (124 jobs)
    Microsoft 365 | Google Workspace | Exchange | SharePoint | Teams | Azure Top Rated Solution Architect in Microsoft 365 and Google Workspace (Formerly G Suite) I am a Sr. System Engineer and Cloud Solution Architect with Experience In Design, Implement, Manage, Migrate and Troubleshoot Azure, AWS, GCP, Office 365, Gsuite, VMware, Exchange, SharePoint, Teams, Windows 10, Mac OS, Outlook, Windows Server, GPO and Azure AD. I work as per the industry best practices and provide consultancy to my clients to implement the best, right, cost-effective and the most productive solution. I can help you with: • Design and implement Microsoft 365 & Google Workspace services • Implement Microsoft 365 & Google Workspace security and threat management • Manage Microsoft 365 & Google Workspace governance and compliance • Office 365 Migration in cut-over, staged and hybrid configuration • GoDaddy, Google Suite (G-suite) to office 365 Migration • Google Workspace (formerly G Suite) Administration and Migration • Google Workspace (formerly G Suite) migration to Microsoft 365 • Outook to Gmail Migration • G Suite to G Suite migration • Office 365 Tenant to Tenant Migration • Mailbox Migration from SBS, Exchange 2003, 2007, 2010 and 2013 to Office 365 • File Server Migration to SharePoint and One Drive • Cloud Drive Migration b/w Box, OneDrive & Google Drive • Email deliverability (SPF, DMARC & DKIM) • Windows 10 & Mac OS IT support • Outlook & Gmail IT support • End User Support • Email Spam issues • Mail flow issues • DNS Management • Manage user identity and roles • Manage access and authentication
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    Email Deliverability
    Google Workspace
    Data Migration
    Desktop Support
    Technical Support
    Network Administration
    System Administration
    Office 365
    Microsoft Azure
    Windows Server
  • $105 hourly

    • 5.0/5
    • (33 jobs)
    I am veteran IT professional with a broad range of experience. I work near fulltime (25+ hours a week) for a manufacturing company managing their infrastructure and part time honing and growing my skills in the freelance market. Please read on to see what I have to offer. A full-range IT Systems and Network Engineer and Administrator. With 21+ years of experience in a wide range of skills with a focus on project design and implementation. Equally capable of working in Windows and UNIX environments. A broad base of general IT knowledge and a constant desire to learn and add skills have provided unique insight and abilities. Experience working with many vendors specializing in medical and enterprise systems. A broad range of experience and a lasting passion for technology combined with excellent troubleshooting and research skills makes for a valuable addition to any team. Project Highlights: Private Cloud deployment, IT systems upgrades, subject matter expert. Systems/Network Administrator for public health district hospital, responsible for setup, automation, and monitoring of private cloud. Managed the transition of legacy systems to new infrastructure. Deployed and administered monitoring and management systems. Handled special projects for the IT Director testing and deploying new systems or finding solutions to long standing issues. Overhauling of existing monitoring and asset tracking systems along with transitioning existing VM’s to new High Availability “A side/B side/C remote BDR” Data Center design dramatically improving systems reliability, while reducing manpower requirements. Consultant for public health district hospital to deploy a private cloud. Deploy and configure a private cloud based on Cisco UCS/EMC VNX/Hyper-V 2012 R2 & VMWare VSPEX reference platform for a regional hospital. Worked closely with existing employees and vendors to assist in bringing the project to a successful completion. Kept on indefinitely to work on improving the existing IT systems including SNMP monitoring (WUG), Syslog, Helpdesk, security, and maintenance automation. The resulting changes improved network reliability and reduced the time and effort required for employees to manage the systems Cloud-based application development, project manager and project technical lead. Systems Administrator/Engineer for deployment of Cloud-based applications and integration with mobile and local systems. Researched, selected and integrated multiple cloud based products to form a completely integrated IT services management solution based on Autotask, N-Able, QuickBooks, StoreGrid, and Channel Online for MSP provider. The final solution handles quoting, ticketing, purchasing, billing and time management. Worked with several consultants and technicians to complete integration and training of employees saving on valuable internal labor and reducing data entry errors. Replacement of existing PACS/RIS solution with RAMSoft PACS/RIS solution Project lead for the replacement of an existing PACS RIS solution from RAMSoft. Worked with incoming and outgoing vendors along with third party vendors and outside providers to facilitate the removal and replacement of existing leased hardware. Coordinated integration of hardware and software from 11 vendors. Completing the project with minimal impact on office operations on time and within budget. HIPAA meaningful use EMR and specialty procedure management systems upgrades/deployments. Project lead for the upgrade and deployment of multiple VMWare server solutions for specialty medical offices. Solutions utilized a variety of hardware and software including Windows Server 2008 R2, 2012, Small Business Server 2008, SQL 2008 (R2), Linux, VMWare ESXi, Cisco hardware, Qnap NAS, HP Servers, and StoreGrid. Supporting various medical software solutions including GE Centricity EMR and Practice Management, GMed GGastro, Maximeyes, and more. Determining what to replace and what to upgrade significantly reducing the overall project cost while providing a solution that met their needs. Using VMWare and robust redundant servers reduced costs by more than 30% while maintaining performance and reliability. Providing the office with a complete solution including email server and BDR solution for significantly less than competitor’s estimates. Identified key performance bottlenecks and applied solutions to complete a fast and reliable solution with complete local and offsite back and disaster recovery.
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    Amazon Web Services
    Tech & IT
    VMware vSphere
    Email Deliverability
    Troubleshooting
    Cloud Computing
    Microsoft Windows PowerShell
    Microsoft Hyper-V Server
    Network Design
    Windows Administration
    Storage Area Network
    Network Administration
    Network Monitoring
    High Availability and Disaster Recovery
  • $20 hourly

    • 5.0/5
    • (24 jobs)
    Did you know that the focus in 2025 for businesses is creating experiences that capture and engage customer attention in new ways? This is backed up by Salesforce, with recent research stating that 80% of customers say the experience a company provides is as important as its product or services. Companies also employ security-centric customer experience practices in the age of generative AI, as 53% of customers believe generative AI will help companies better serve customers. So now the million-dollar question is; Does your company invest in hiring great Technical and Customer Support professionals to keep up with the growing trends? In our present time, being good simply isn't good enough to succeed; you've got to be great. For your company to be great, it is heavily decided on if you can provide GREAT service to your clients and customers, but you already know that they know that, everyone knows that. So, how can you provide that great service and have a growing customer base? Well, the truth is, - YOU need an expert to lead the Customer-facing team in the company and bring turnaround results across the board. -YOU need a PEOPLE-oriented team of professionals with expertise in Customer Service. -YOU require an individual with excellent communication skills to provide call, chat, and email support. -Someone capable of answering product questions, providing end-user support, and crafting easy-to-read FAQs compilation, that is what YOU need. And as it turns out, 65% of US consumers would pay 5% more for products if they knew they would receive outstanding customer support and satisfaction. This brings us to why I'm here. With over 4years working in Tech & IT as a Technical and Customer Support Specialist, I believe I am exactly what YOU need. This is because of my deep passion for technology and people, I am completely convinced that Technical Support is the most fulfilling career, nothing beats the feeling of genuinely helping someone! Your goals will become mine, and I look forward to working with you and for you to achieve them. I am skilled, flexible, and an effective communicator with a helpful disposition and exceptional customer service abilities. Here are some more details about me. ✔Top Rated PLUS Upwork Freelancer (Top 3%) ✔BSc. Computer Engineering ✔Google Certified IT Support Specialist ✔HubSpot Service Hub Certified Professional ✔Freshdesk Certified Product Expert ✔ LinkedIn Certified Customer Service Specialist ✔Certified Professional: Cybersecurity Foundations ✔Comptia Sec+: Cybrary Certified Need a little nudge? Check out what other clients and business owners say about my services below. Feel free to shoot me an invite so we can have a chat and discuss your business needs. I look forward to it and will most definitely be at your service. Thanks!
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    Article Writing
    Technical Writing
    Blog Content
    Customer Relationship Management
    Troubleshooting
    Content Writing
    Information Technology Operations
    Customer Satisfaction
    Technical Support
    Technical Documentation
    Customer Service
    Customer Support
    Online Chat Support
    Jira
    Email Support
  • $45 hourly

    • 4.7/5
    • (307 jobs)
    I am independent network consultant with 19 years of experience in network/security business and a CCIE Security #36569 Engineer. As a rule I only give out proposals to jobs that I know how to finish. My goal is to solve issues at hand quickly, precisely and without any delays. As a system engineer and consultant I was responsible for design, implementation and operations of setups ranging from SMB networks to large worldwide-scale deployments. Some of projects I was involved in a significant capacity (lead designer, main contractor for deployment and operations, ...) in included: - SD-WAN networks buildup and operation for two global, publicly traded corporations - Network buildup, optimization and operation for SMBs and mid-range businesses - Building infrastructure for several public VPN providers - Design and implementation MPLS Core infrastructure spanning up to 100 power plants - PCI Tier4-certified payment gateway infrastructure for national toll systems
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    Linux System Administration
    Cisco Certified Internetwork Expert
    Palo Alto Firewalls
    Cisco Router
    Network Administration
    Network Security
    Cisco Meraki
    Zabbix
    Cisco ASA
  • $50 hourly

    • 4.8/5
    • (107 jobs)
    Expert Technical Writer | Copywriter | Content Writing Specialist. I am a native English speaker and can help you drive business success using this. I'm the man to contact if you're looking at generating traffic for your website through SEO writing or through engaging blog articles. My specialty is breaking down complex technical concepts into simple, easy-to-read, and engaging content. Whether it's in creating help documentation for your users or content for your blogs, I can help you ensure that your users fully understand the benefits of your tech platform or solution. In recent times, I have successfully delivered on B2B and Tech Writing projects. So whether you're interested in writing about Penetration Testing, Virtualization, Web Host Managers (WHM), VPNs, Ransomware attacks, or how to improve business processes, I can help you produce brilliant and engaging content. The following are some of the recent topics and industries I have recently covered: - Cyber Threat Intelligence - Authentication - VPN Comparisons - WannaCry Ransomware - Linux OS Versions - Security Automation tools - Security Orchestration - Web Hosting Tutorials - Cloud Security - IoT and Bots - SaaS - ... and so much more I also have experience designing WordPress blogs and websites, which has gone hand in hand with my writing expertise, especially in terms of SEO-related articles and blog management over the past few years. Furthermore, I'm currently studying software engineering and have a fair understanding of how the software works. I'm proficient with the following; - Linux Commands - Scripting - Shell Navigation - Shell Permissions - Git Versioning - Git Hub - Setting up Virtual Machines - Basic C Programming - Basic Python Programming It'd be great to chat more about your project if you're still reading this. Hit the Hire button!
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    Copywriting
    GitHub
    Git
    Unix Shell
    Product Page
    Scripting
    Article Writing
    Case Studies
    WordPress
    Technical Case Study
    Writing
    Technical Writing
    Intercom
    HubSpot
    Yoast SEO
  • $80 hourly

    • 4.9/5
    • (137 jobs)
    Over 25 years of progressive experience in computer networks field. Comprehensive network technology knowledge in designing, implementation, administration and support. In-depth knowledge of deploying IP protocols and troubleshooting. Experienced in layer 2 switching and 3 routing, security and wireless. Extensive experience in Planning, Implementation, Configuring, Testing and Troubleshooting of networking systems. Competent in handling escalating problems. 7+ years as a Cisco Networking Academy Manager and Instructor. In-depth knowledge of major server OSes. Exceptional analytical abilities. Confident, polite and patient.
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    PfSense
    Proxmox VE
    Wireless Network Implementation
    Wireless Security
    Ubuntu
    Cisco Certified Design Associate
    OpenVPN
    Server Virtualization
    Linux System Administration
    Cisco IOS
    Network Design
    Cisco Certified Network Associate
    Network Security
  • $35 hourly

    • 4.9/5
    • (297 jobs)
    CCSE, ITILv3 , Fortinet NSE4 CCNP R&S,CCNP Security. In the last 12 years, I have been working on various network products and have gained comprehensive experience in Cisco, Fortinet, Sonicwall, Checkpoint, HP, F5, Radware technologies. I have been involved in the design, configuration, and troubleshooting of Network products. Firewalls: Cisco ASA 5500 Series Cisco ASA 5500-X Series Cisco Firepower 2100Series Cisco Firepower 4100Series Fortigate 400F Fortigate 200F Fortigate 100F Checkpoint 5800 Appliance Checkpoint 12400 Appliances Checkpoint 12600 Appliances Sonicwall TZ Series Sonicwall NSA Series Pfsense ZTNA FortiGate ZTNA Load Balancers: F5 BIG-IP Application Delivery Controllers Radware Application Delivery Controllers Array Application Delivery Controllers Fortinet Application Delivery Controllers. Routers: Cisco, Arista, HP Switches: Cisco Catalyst Cisco Nexus N5K & N9K HP Switches Wireless Controller & Access Points: Cisco WLC, Aruba WLC Unify WLC Meraki
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    Cisco Router
    Firewall
    SonicWall
    Cisco Firepower Threat Defense
    FortiGate Firewall
    Zero Trust Architecture
    Web Proxy
    Cisco ASA
    Cisco Certified Network Professional
    Load Balancing
    Check Point
    Network Security
    Cisco Meraki
  • $120 hourly

    • 5.0/5
    • (259 jobs)
    Proficient in Cisco , Mikrotik , Ubiqity gear etc, I offer my 10 years experience to design, implement and troubleshoot complex networks. I am a self-motivated professional with strong work ethic and productive self-starter. Participated in multiple projects, contributing in large teams, effectively co-working with other professionals,which strong team-player skills.
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    Firewall
    Ubiquiti
    SSL
    Amazon EC2
    Network Security
    MikroTik RouterOS
    Virtualization
    Azure DevOps
    Cisco Meraki
    Cisco ASA
    Wireless Network Implementation
    VMware ESX Server
    AWS Systems Manager
    Amazon Web Services
  • $40 hourly

    • 5.0/5
    • (19 jobs)
    Expert in Mikrotik, Ubiquity, gained from working in a WISP/ISP environment. Hands-on different types of gear: Meraki, Radwin, SAF, Netonix, Cambium, Mimosa. Hands-on different monitoring systems: Zabbix, PRTG, UNMS, DUDE. Planning, configuring and troubleshooting different sizes and types of networks.(Wired and Wireless)
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    Customer Service
    Technical Support
    WiFi
    Mikrotik RouterBOARD
    Wireless Network Implementation
    OpenVPN
    MikroTik RouterOS
    Virtualization
    Network Engineering
    Virtual LAN
    Ubiquiti
    Network Administration
    Internet Protocol Security
    Network Design
  • $50 hourly

    • 4.9/5
    • (45 jobs)
    Expert in Routing, Switching, and Firewalls, earned CCNA, CCNP, and CCIE Cisco Certs, proven expertise in Pfsense, Cisco devices & other firewalls. I have gained expert-level skills in diagnosis and troubleshooting for cloud-based and on-premise security and network equipment from Cisco, pfsense, Palo Alto, Sonic Wall, Ubiquity, Mikrotik, and many more. Expert level configuration skills in cloud deployments and SDNs such as Hetzner, GCP (Google Cloud Platform), Microsoft Azure, Digital Oceans, and AWS (Amazon web services), provided network and application security services using third-party cloud-provided firewalls/pfsense, etc I have managed and secured VM networks for multiple clients/Organisations and secured cloud-based and on-premise POS/ERP software, I also had the privilege of providing design and security expertise to a few local companies managing clouds and small data centers. I am well-versed with VPN technologies such as IPsec, dmvpn (cisco), flex, tail scale, gre, wireguard, and Openvpn for devices/firewalls such as Cisco, pFsense, Mikrotik, Openwrt, Linux, Sonic wall, and others. I have proven expertise in managing hypervisors such as Proxmox VE, HyperV, and KVM, also managed and configured cloud-managed backups with the proxmox backup server and Vaeem. I have proven expertise in Docker Containerisation (Application deployment) with docker swarm and docker-compose, Kubernetes, and Terraform. I have provided support/ consultancy to many call centers, software houses, and workspaces, including multiple small and medium organizations globally. I have proven expertise with s2s, remote, on-premise2cloud VPN connectivity, proven expertise with Zabbix configuration/monitoring/alert management, and provided state-of-the-art security with IDS and IPS such as Snort and Suricata on Linux, pfsense, and opensense. I have proven expertise with traffic filtering, torrent blocking, Quality of Service for VOIP, and user-specific bandwidth allocation through using Pfsense/opensense/linux/cisco limiters and shapers.
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    UniFi
    Docker
    Zabbix
    Ubiquiti
    Cisco
    MikroTik
    PfSense
    Proxmox VE
    Amazon EC2
    Network Security
    Firewall
    OpenVPN
    Linux
    Amazon Web Services
  • $50 hourly

    • 5.0/5
    • (90 jobs)
    System administrator for various Linux distributions, database and network administrator. Managing complex deployments for python, php, java and nodejs. Security technology specialist with over 15 years of experience in wide areas of network engineering and management, cyber and systems security, software and web development, cloud computing. Dedicated to improving critical thinking and providing best solutions and results. Able to adapt to changing priorities and maintain a positive attitude and strong work ethics. * Worked on various vpn implementation project for financing and banking industry (payment gateways, SIP implementation, etc.), gateway and remote access for both Unix and Windows servers * Experience with various vpn platforms (pfsense/opnsense, vyatta, vyos, openvpn, wireguard, shadowsocks, Unix based vpn, etc.) * PCI compliance specialist, able to deliver quality in short time * Strong troubleshooting network and routing problems skill * ElasticSearch cluster and replication, logstash, kibana and indexing strategies specialist
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    Kernel-based Virtual Machine
    Docker
    SEO Backlinking
    Information Security
    Search Engine Optimization
    Configuration Management
    Server
    Elasticsearch
    Load Balancing
    Database Administration
    Email Security
    Linux System Administration
    Network Engineering
    NGINX
  • $40 hourly

    • 4.9/5
    • (71 jobs)
    An experienced software developer/architect/product development manager with over 15 years of solid experience in developing advanced and secure networking software for routers, switches, firewalls, servers and network appliances. Possesses deep working knowledge in IPv6, routing protocols, operating system, firewall, client-server application, management protocols and applications. Very proficient in C, C++, Perl, Unix scripting, modular and OOP programming, client-server and has advanced working skills in PHP, Ruby/Rails, Java, SQL, non-SQL and Web technologies. Mainly used FreeBSD and Linux in all projects. Heavily involved in all phases of development, from conceptualization, requirement specification making, designing, implementation, testing and maintenance. I am seeking opportunities to design and develop network appliances from the ground up, migrate networking applications to incorporate secure technologies and run on IPv4 and IPv6 and build intuitive and secure websites or web-based management interfaces. Summary of competencies and skills - System/network/security administration using open source and commercial solutions such as pfSense, OPNsense, BIND/DHCP/DNS, Freeswitch/Asterisk/SIP/VoIP, Sophos, Sonicwall, OpenWrt, ELK Stack, Grafana/Prometheus, Zabbix, Nagios, SNMP, OpenVPN, IPsec, Wireguard, HAProxy, MongoDB, MySQL/PostgreSQL, Redis, Nginx, Apache, Squid, Snort, OpenStack, Radius, OpenLDAP, Ceph, RabbitMQ, Kali Linux, Connectwise Manage, Connectwise RMM, Connectwise Perch, Bitdefender, WebRoot, Auvik - Unix and Linux system, security, and network administration and dual-stack network/sockets programming - System/Application programming with C/C++, PHP, Ruby, Perl and Shell scripting. - Cloud computing and networking on AWS, IONOS and Digital Ocean environments - Virtualization with Proxmox, ESXi, vSphere, and KVM - Containerization using Dockers - Project management in various methodologies such as Extreme programming, Agile, Iterative, Waterfall, Prototyping, and Scrum - Software and hardware product development covering all phases of product life cycle - Secure networking software development for routers, switches, and network appliances in IPv4 and IPv6 network stacks - Software testing automation and Continuous Integration (CI) using Gitlab/Github, Jenkins, Robot Framework, Selenium - Risk assessment, Penetration testing, Disaster Recovery, Compliance and Interoperability testing, Performance and Capacity testing and High Availability deployment, management - Web Services, Application and network design, deployment, monitoring, and management - Managed Services Provider support and deployment, Connectwise suite(Manage, RMM, Perch), Bitdefender, Webroot, Auvik - Asset management, Document and Source Code control - Human resource training, career and life coaching
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    Network Administration
    Firewall
    C++
    PHP
    JavaScript
    Unix System Administration
    Ruby on Rails
    C
    Perl
    DNS
  • $110 hourly

    • 4.3/5
    • (19 jobs)
    Hello, I am Juhi Jaiswal, a network and security engineer based in Houston, TX. I have eight years of professional IT experience and have worked on enterprise networks that serve thousands of users. When we work together, we share the same goal, maximizing the productivity of your network to keep your business operations going securely for your valuable data.  Specialization: IPsec and SSL VPN implementation and troubleshooting Fortigate firewalls administration - DHCP, NAT, DNS, AP, TCP/UDP/IP AWS Cloud Networking - VPC, Security group, NACL VPC Peering, NAT gateway, Transit Gateway Advanced troubleshooting & traffic analysis  Enterprise network design  SD-WAN implementation High Availability Static and Dynamic Routing - BGP and OSPF Fortimanager - Policy/Device configuration and propagation, VPN management Fortianalyzer - Network security logging, analysis, and reporting Professional qualifications : AWS Certified Advanced Networking – Specialty - EQW2JTVLBFV4QY39 AWS Certified Cloud Practitioner - 3WD8QBXLDMR1QDKZ Fortinet Certified Network Security Architect (Enterprise Firewall) (NSE7) – FsrQayxtj0 Fortinet Certified Network Security Analyst (FortiManager and FortiAnalyzer) (NSE5) - 7m42GMOB25 Fortinet Certified Network Security Professional (NSE4) - J98CJ0U01Z Please send me a brief about your project and your requirement. If it seems like a good fit, we will schedule a call to discuss it more detail.
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    Microsoft Azure
    Amazon Web Services
    Cloud Security
    Cisco Meraki
    PfSense
    Palo Alto Firewalls
    MikroTik RouterOS
    Network Design
    Ubiquiti
    Fortinet
    Network Administration
    Firewall
    Cisco ASA
    Internet Protocol Security
  • $35 hourly

    • 5.0/5
    • (14 jobs)
    Network engineer with over 8 years of experience. In workflows, it was often necessary to master new technologies in order to troubleshoot and maintain critical services. Always ready to learn to acquire new skills and experience - Successfully finished Fortinet NSE 7 Network Security Architect - Have knowledge in administrating Exchange Servers - Worked with OCI and Azure
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    Network Equipment
    FortiGate Firewall
    Linux System Administration
    HAProxy
    Information Security
    Computing & Networking
    Fortinet
    Computer Network
    Microsoft Exchange Server
    Network Engineering
    Network Administration
    Load Balancing
    Network Security
    Firewall
  • $40 hourly

    • 4.9/5
    • (109 jobs)
    Hello! I’m Radion, an experienced network engineer with over a decade of expertise in designing, implementing, and managing complex network infrastructures. My focus has been on creating secure, scalable, and reliable solutions tailored to diverse client needs. Network Design & Implementation I specialize in building scalable network infrastructures, with extensive experience in core protocols: Routing Protocols: Proficient in BGP and OSPF, focusing on efficient routing, reliability, and failover support. Experience with static routing, EIGRP, and RIP in specialized environments. Switching & VLANs: Expertise in configuring VLANs and switching protocols, including Spanning Tree Protocol (STP), Rapid Spanning Tree (RSTP), and Virtual Router Redundancy Protocol (VRRP), enhancing network stability, performance, and security. Network Security Security is an integral part of my approach, with extensive skills in protecting data and network integrity: Firewall Configuration: Skilled in deploying firewalls on MikroTik, Cisco, Fortigate, and PFsense to prevent unauthorized access and safeguard networks. VPNs: Proficient in secure VPN solutions, including PPTP, L2TP, IPsec, and OpenVPN, to enable encrypted remote access. IDS/IPS Systems: Experience with intrusion detection and prevention systems, helping identify and block threats before they impact performance. Systems Administration In addition to network engineering, I manage operating system environments to ensure smooth network performance: OS Administration: Proficient in Windows Server and Linux (Ubuntu, CentOS), managing and optimizing server uptime. Automation: Skilled in scripting and automation to streamline network tasks, reduce error, and enhance response times. Protocol Expertise My hands-on experience covers a broad range of essential protocols that are key to network functionality: IPoE, DHCP, DNS, and TCP/IP: Extensive knowledge of core internet protocols. PPPoE and QoS: Experience with PPPoE and Quality of Service (QoS) protocols for prioritized traffic management and efficient customer support. Multicast (IGMP): Proficient in configuring and managing multicast (IGMP) for optimized multimedia streaming, ideal for IPTV and similar services. Certifications To stay on the cutting edge of technology and maintain high standards, I hold multiple certifications: MikroTik: Certified in MTCNA, MTCRE, MTCEWE, and MTCTC, specializing in routing, wireless, and network troubleshooting. Ubiquiti: UNS and UEWA certifications in advanced wireless deployments. RIPE: Certified for BGP database integration, enabling efficient multi-AS management. Why Choose Me? I take pride in understanding and exceeding client needs with tailored solutions. My work on Upwork and with direct clients demonstrates a successful track record, especially in BGP and complex network design projects. I am committed to continuous improvement, always adapting to new industry practices. My past projects span from supporting small businesses to large enterprises, adapting solutions to meet unique requirements. Feel free to contact me to discuss how I can support your network needs. I look forward to the opportunity to work together!
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    Multiprotocol BGP
    Ingress Filtering
    Mikrotik RouterBOARD
    OSPF
    MikroTik RouterOS
    Fiber Optics
    PfSense
    Firewall
    Fortinet
    MikroTik
    Zabbix
    Ubiquiti
    Network Design
  • $35 hourly

    • 5.0/5
    • (113 jobs)
    IT professional with more than 8 years of hands-on experience with: ● Cisco Enterprise Switches (2960-4500) ● Cisco SB Switches ● Cisco Routers (800-2900) ● Cisco ASAs (5505-5540) ● Juniper SRX Appliances (210-650) ● Juniper EX Switches (2200-4200) ● Site-to-Site VPN ● Remote Access VPN ● Network Monitoring ● Topology Planning I am result-oriented and always do my best to fulfill the client’s needs. I have strong practical skills in network infrastructure design and troubleshooting, as well as in configuration of different types of network devices of major vendors.
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    Microsoft Azure
    Cisco ASA
    Firewall
    Internet Protocol Security
    OpenVPN
    Cisco Router
    Junos OS
    Network Security
    Juniper
    Virtual LAN
    Network Design
  • $110 hourly

    • 5.0/5
    • (23 jobs)
    Expertise in Cloud(Microsoft Azure) infrastructure, PaaS, IaaS, and SaaS as well as Compute(Server), virtual hypervisors(VMWare) and enterprise storage arrays(EMC, HP, Pure, and Netapp)
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    Storage Array
    Cisco UCS
    VMware PowerCLI
    Storage Area Network
    GPO
    VMWare
    VMware vSphere
    Windows Server
    Microsoft Active Directory
    Microsoft Windows
    Microsoft IIS
    Microsoft Azure
    DHCP
    Office 365
  • $60 hourly

    • 5.0/5
    • (22 jobs)
    I’ve been freelancing for 10+ years, and have also been writing about VPNs for 5+ years. Throughout my career, I have written content for several top VPN review sites, including SafetyDetectives, CyberWaters, ProPrivacy, TechNadu, and more. I specialize in VPNs, and am extremely familiar with how VPNs work, their use cases, their limitations, and more. I also use top brands like ExpressVPN, NordVPN, Surfshark, CyberGhost VPN, Private Internet Access, PrivateVPN, and Proton VPN daily, either for work or personal reasons, so I'm really familiar with all the top vendors. I also know how to write content that ranks and sells well, mostly because I know how to address each type of reader's pain points. Basically, all the content I write targets the keyword very naturally, and that doesn't mean I use a list of keywords when writing my content. Instead, I make sure my content is 100% relevant for the reader. For example, if I write a list of the best VPNs for streaming, I won't focus the content on off-topic things like torrenting, customer support, and handshake encryption. Instead, I'd focus the mini-reviews on relevant features, like how many streaming services the VPN works with (plus which popular sites it works with), how fast the VPN is for streaming, if the VPN has a smart DNS, and how easy it is to use the VPN's mobile and desktop apps.
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    Privacy Law
    Internet Security
    Data Privacy
    Online Writing
    Copywriting
    Product Description
    Content Writing
    SEO Writing
    Blog Writing
    Article Writing
  • $35 hourly

    • 5.0/5
    • (50 jobs)
    I'm iOS developer since 2012 and over the last years I've created different types of successful apps. Worked with almost everything that iOS/MacOS provide for me as for developer. Partial list of functionality that I worked with: - Social networking - Photo/video editing (native filters and custom GPU shaders) - GPS based services (tracking) - Google/Apple maps - Bluetooth Low Energy (BLE) - eSIM integration - Google APIs integration - Real time messaging (tcp/udp sockets) - Encryption/decryption (elliptic curve) - VPN (ikev2/ovpn/wireguard/pptp/l2tp + obfuscation to avoid DPI) - XRay/VLESS/XTLS/Reality - ShadowSocks (TCP/UDP) - Data streaming (tcp/udp sockets) - Analytics (AppsFlyer/Adapty/Amplitude/Facebook/Firebase/RevenueCat) - Payment systems integration (Stripe and many others) - NFT (OpenSea integration) - Web3 (Solana smart contracts) Experience with AI: - ChatGPT (v3.5, v4) - Training custom GPT models (pre-trained model which can act like support or sales manager on your web site) - Stable diffusion (generating images/animations) - Editing existing image using text/voice prompt - Identifying objects from photo/video - Voice assistant (audio/text) And much more others. For Android mobile apps development and delivery, I work in a team Kotlin developers, also PHP/Node.js/Vue.js/React/C# for desktop/web development. This allows my clients to keep all the development in one hands with one responsible person. * I am a self-motivated person. Able to reach deadlines at the time and work either independently or in a team. * Responsible and result-oriented. * I'm good at writing clean, reusable code and keen on mobile development no matter is it a working hour or not. * Great communication skills. I have fluent English, Russian. * I always try to keep myself in a positive mood no matter what, stick to logic thinking, and desire to learn something new. * Have an eye for details, always achieving a good quality of work.
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    Objective-C
    Socket Programming
    Real Time Stream Processing
    Stripe SDK
    Twilio API
    Firebase
    Background Music
    Realm Database
    Swift
    Cloudflare
    iOS Development
    GPT-3
    iOS
    VoIP
    DigitalOcean
    Push Notifications
  • $35 hourly

    • 4.9/5
    • (14 jobs)
    My name is Brent and I have over two and a half decades of progressive IT experience in all realms of Information Technology and related fields. I have held positions ranging from a help desk professional, to IT manager and CIO of medium sized businesses. I’ve managed teams and groups, coordinated large projects with many vendors and moving pieces with million-dollar budgets, and planned and implemented countless small to very large projects. Some of my skills include: Advanced Networking including advanced routing, cabling, 802.1x, 802.1ad, wireless, VLANs, and more Firewall and intrusion prevention across multiple brands including Sophos, WatchGuard, SonicWall, Fortinet, Juniper, and others Security and network hardening experience including RBAC, NAT and port protection, PKI infrastructure and certificates, and more Physical security, access control, and cameras system design, setup, and management Microsoft Active Directory Domains including DNS, group policy, RDP (Remote Desktop), and all other Microsoft Server features Expert in management of Microsoft software packages including SQL, Exchange, Office 365, and more including database management Experience designing failover and load balancing systems at the software (SQL, Exchange, many others) and hardware levels (VMWare, Raid, SAN, Datacenter, etc) SAN and storage products from many vendors including iSCSI and Fibre Channel Virtualization infrastructures including VMware, Hyper-V, and more Programming skills in several languages, and vast scripting experience in PowerShell, scripting (Powershell, VBScript), and others Vast experience with Server and Storage hardware from Dell, HP, Cisco, Nimble, NetApp, Pure Storage, EMC, Synology, and more Advanced operating knowledge of operating systems including Microsoft Server, Windows, and Mac OS Experience with VOIP from many different vendors including Cisco, Mitel, and old PBX systems Experience designing and operating data centers including layout, power design, and cooling management Experience managing and implementing cloud solutions from AWS, Azure, and more Vendor and Contract Management including contract renegotiations, licensing, and large project management Some of my certifications include: Cisco: CCNA, CCNP CompTIA: A+ Microsoft: MCP, MCSA, MCSE 2003, MCPS, MCNPS, MSBS, MCTS:Vista, MCTS: Windows Server 2008 Active Directory, MCTS: Windows Server 2008 Network Infrastructure, MCTS: Windows Server 2008 Application Platform, MCTS: Exchange Server 2010 Configuration, MCITP: Server Administrator 2008, MCITP: Enterprise Administrator 2008, MCITP: Exchange Messaging Administrator 2010 VMWare: VSP 4.1, VTSP 4.1, VCP 4.1/5.0/5.5, Exchange on VMware Accreditation Citrix: CCA XenApp 6, CCA Netscaler, CCA Access Gateway
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    IT Management
    Backup & Migration
    Network Engineering
    Load Balancing
    Data Recovery
    Network Administration
    Storage Area Network
    Firewall
    Disaster Recovery
    Data Center
    Windows Server
    System Administration
    Microsoft Active Directory
    Citrix Virtual Apps & Desktops
    Microsoft IIS
  • $90 hourly

    • 4.9/5
    • (513 jobs)
    Top-ranked self-motivated professional DevOps and Cloud architect with strong work ethic and productive self-starter – proven with success being a freelancer at Upwork(ex-oDesk). Team player - Participated in multiple projects, joining large teams, effectively co-working with other professionals. Among my long-term customers: - Stanford University - Motorola - Bwin Interactive - Fairchild Semiconductor - Texas Instruments Effective leader - Took over leadership and managed team resources to achieve goals meeting deadlines Experience: 24+ years as an Systems Administrator 17+ years as Network Engineer 12+ years as Cloud Expert and SaaS Architect 8+ years @ DevOps Freelancer for last 14 years (over 70,000hrs worked @oDesk/Upwork)
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    Deployment Automation
    CI/CD
    Docker
    Linux System Administration
    Unix Shell
    DevOps
    MySQL
    Network Administration
    Amazon Web Services
  • $55 hourly

    • 4.9/5
    • (136 jobs)
    Cisco Certified CCNP - Enterprise, CCNP - Security, and CCNA Cyber Ops and Experienced IT, Network, Security Specialist skilled & I have more than ten years of experience with following, - Assist in planning, design, documentation, and implementation of Network, Security, and System infrastructure - Hands-on experience with configuration administration of Cisco, Meraki, HP, Dell, Ubiquiti, routers, switches, and network devices and Cisco ASA, Fortinet, SonicWall, PaloAlto, pfSense, OPNsense firewall devices - TCP/IP, Routing and Switching Protocols RIP, EIGRP, OSPF, BGP, GLBP VRRP, HSRP, VLANS, STP, VTP, ACL, Security features - IP Sec site to site and remote access VPN on Ubiquiti Unifi, Fortigate, SonicWall, PaloAlto, pfSense, OPNsense firewalls, AWS, Azure, GCP cloud services, and Strongswan, Openswan and Libreswan as well - Familiar with security platforms such as IPS, IDS, Web Security Appliance, Email Security Appliance, and Cisco ISE - Familiar with VOIP platforms such as FreePBX, Grandstrem, etc
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    Cisco IOS
    Cisco Router
    Ubiquiti
    PfSense
    Cisco Certified Network Professional
    Wireless Network Implementation
    Firewall
    Palo Alto Firewalls
    Network Monitoring
    Network Security
    Cisco ASA
    Fortinet
    Grandstream
    DNS
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