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based on 1,535 client reviews
  • $35 hourly
    My skills cover such areas as TCP/IP networking, FreeBSD/Linux and MS Windows servers administration and support, virtualization and accompanying technologies. In my latest projects I used Mikrotik and OpenWRT solutions to build several IPTV distribution networks, local networks for offices and their inerconnection via various types of VPN. Earlier experiences include projects built on networking equipment of famous and not-so vendors, server installation and support, different kinds of scripting and configuring many sophisticated systems so as to fit them for a designated task.
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    Computer Network
    OpenWrt
    Firewall
    OpenVPN
    MikroTik RouterOS
    Linux System Administration
    Linux
    Network Equipment
    Network Engineering
    SSL
  • $95 hourly
    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
  • $100 hourly
    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
  • $150 hourly
    Telecommunication and Systems engineer with a focus on Cloud, Networking and Linux, experience in Infrastructure management and deployment. Deployed Private Cloud infrastructure, Datacenter Network Design for Multi-tenancy, fault-tolerant design, NIC Bonding and VRRP for High Availability. Stack: *Full virtual networking with vSwitches and vRouters *VLAN, VxLAN, GRE and Overlay tunnels *IPv6 *MP-BGP, EVPN *Firewalling *VPN/OpenVPN/IPSec/WireGuard/Site to Site and Client-Server *Advanced Linux management: IPTables, Kernel modules, Virtualization, Networking. *Traffic engineering *Advanced StrongSwan IPSec tunnels, XFRM *Cloudstack with Open vSwitch *OpenNebula with Open vSwitch *OpenDaylight SDN controller with OpenvSwitch *Advanced Proxy setup with Squid/Nginx *Virtuozzo and OpenVZ *KVM and Libvirtd *RADIUS and FreeRADIUS *Pacemaker/Corosync/Keepalived HA cluster *MTLS design and implementation with NGINX *IoT gateway implementation with Raspberry Pi and 4G modems *DevOps experience with Chef and Ansible *Bash and Python scripting
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    Internet of Things
    Apache CloudStack
    Linux System Administration
    OpenVPN
    Computer Network
    Private Cloud
    Kernel-based Virtual Machine
    System Administration
    Firewall
    Ubuntu
    Network Security
    Linux
    Internet Protocol Security
    Network Engineering
  • $45 hourly
    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
  • $40 hourly
    With over 16 years of experience in cloud computing, I am a seasoned professional with a strong skill set in AWS/Azure/Google Cloud, AKS, GKS, EKS, Compliance implementation (PCI/DSS, HIPPA, ISO, SOC2, GDPR), Linux system administration, DevOps, infrastructure as code using Terraform and Ansible, and CI/CD pipeline deployment. As a Cloud Computing Designer with 12+ years of experience, I specialize in AWS/Azure solutions and security architecture. My experience includes working with a range of Server OS Linux platforms, including Ubuntu, Debian, Centos, and Redhat. I have also worked extensively with Docker/K8, EKS, GKS, and AKS, as well as Compliance implementation and management, covering PCI/DSS, HIPPA, SOC, ISO, AAA, and GDPR. In addition to my proficiency in cloud servers such as AWS, Google-Cloud, Azure, Linode, DigitalOcean, Vultr, Hetzner, and Heroku, I have extensive experience in DevOps, infrastructure as code using Terraform and Ansible, and CI/CD pipeline deployment. My toolset includes Docker, Puppet, Gitlab, Jenkins, Bash, and Powershell. I am familiar with various monitoring tools such as Nagios, Zabbix, and Newrelic, and I have worked with multiple web servers, including Apache, Nginx, and IIS. My experience with SSL certificates includes working with Letsencrypt, Comodo, Symantec, Digicert, self-signed, and other SSL certificates. In addition, I have worked with email servers such as Exim, Postfix, Sendmail, Dovecot, and Cyrus-IMAP. I have also managed email deliverability using PTR, SPF, DKIM, and DMARC. My proficiency in WordPress includes installing, migrating, and troubleshooting, and I have worked with firewalls such as Linux iptables, Fail2ban, and mod_security. I am also well-versed in other application servers, including DNS, FTP, DHCP, OpenVPN, PPTP, Proxy, and Samba. Furthermore, I have experience working with Windows servers, including 2012/2016 (AD DS, DNS, DHCP, Failover, NAT, GPO, RDP, WSUS, TS, IPAM), adding to my versatility and adaptability in the industry. In conclusion, my extensive experience and diverse skill set make me a valuable asset to any organization looking to build and maintain a robust cloud infrastructure, utilizing the latest DevOps, infrastructure as code, and CI/CD pipeline deployment methodologies.
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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
  • $40 hourly
    My working practice is 10 years in a local ISP meganet.md, it's about 2000 home customers and 500 small companies. Based on Gpon equipment, including wireless and ethernet networks on Mikrotik, Cisco, PFsense, Fortigate, and Ubiquiti. My training/certifications: MikroTik MTCNA(network associate), MTCRE(routing engineer), MTCEWE(enterprise Wireless engineer), MTCTC(traffic control) certificates. UNS (Unifi network specialist) UEWA (Ubiquiti Enterprise Wireless Admin) Also, I work with RIPE for BGP database Integration, and also have a certificate from RIPE for that. I can be useful with network administration, configuration, network design, and architecture. Solve any network problems. Create an automatic monitoring system for your network, which logs and messages for all events. I set up an Asterisk server based on Elastix. IPTV service based on Multicast/unicast IPTV stream and middleware stalker. I manage ESXi VM stations with virtual machines. I know protocols: BGP, OSPF, VLAN, IPoE, PPP, PPTP, L2TP, DHCP, DNS, NTP, SMTP, SNMP, STP, RSTP, SIP, SSH, Telnet, traceroute, ping, FTP, TFTP, HTTP, HTTPS, POP3, Imap, NV2, Nstreme, WiFi, CAPsMAN, CAP, 802.11a/b/g/n/ac/ax/ad, mesh, hotspot, Access Lists, DFS, WPS, static routes, PIM, IGMP, IGMP proxy, IPv4, IPv6, ICMP, TCP, UDP, HLS, RTP, and more else.
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    Multiprotocol BGP
    Ingress Filtering
    Mikrotik RouterBOARD
    OSPF
    MikroTik RouterOS
    Fiber Optics
    PfSense
    Firewall
    Fortinet
    MikroTik
    Zabbix
    Ubiquiti
    Network Design
  • $125 hourly
    I have recently started the transition from full time employee to full time freelancer. I am looking for both challenging short term engagements and ongoing support contracts. 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
  • $110 hourly
    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
    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
  • $50 hourly
    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
  • $75 hourly
    Do you want a quick and professional IT support? Then let's read what my previous Upwork clients had said about me: "Abdu was awesome. Extremely patient, great communication and really knows his stuff. Will be working together again for sure :)" "With AbdelRahman, all work is done with no supervision !! Great professional !" "Best freelancer on Upwork, hands down. Very very skilled, always available, great at communicating and very friendly. I highly recommend you to hire Reda! Don't look any further, he is definitely your guy! 10/10" "Abdu is a highly skilled, patient and friendly freelancer. He helped to get rid off the most stubborn virus and make the machine work beautifully again. The process was extremely fast, as Abdu knew what he was doing. Me myself and friends tried to solve the problem ourself (IT guys), and Abdu had it done within an hour. Very impressed. I do recommend hiring Abdu for any technical issues or administration. Fluent English and great at communication, satisfaction is almost guaranteed. Will hire again if needed!" Summary ITIL Certified IT Professional with 8+ years of experience in designing, building, operating, and optimizing IT solutions, establishing enterprise architectures, defining IT policies, processes, and procedures in diversified and multinational companies with technical and managerial experience in the areas of IT Operation, Infrastructure and Project Management, with specialization in Datacenters, Microsoft Infrastructure, Messaging, Virtualization, Cloud Computing, Disaster Recovery, and Business Continuity. Professional Qualifications persistent career development starting from pure technical positions up to managerial positions resulting in a great mix of technical and managerial experience and capabilities. ▪ Technical expertise in the IT Operations and Infrastructure including Data Centers, Servers, Storage, Network, Security, Virtualization, Private & Public Cloud, Disaster Recovery and Business Continuity. ▪ Advanced experience with Office 365 Exchange Online, SharePoint, Teams, Skype for Business. ▪ Excellent skills in problem management, troubleshooting, and root cause analysis. ▪ Good skills in Business Analysis, Project Management, Presentation, and Documentation. ▪ Good skills in team building, leadership, and mentoring.
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    Email Communication
    Mobile Device Management
    Microsoft Exchange Online
    Email Security
    Microsoft Endpoint Manager
    Microsoft Azure
    Autopilot
    Email Support
    Google Workspace Administration
    Cloud Engineering
    Tech & IT
    Server Virtualization
    System Administration
    macOS
  • $55 hourly
    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. * 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, Puppet, Terraform, OpenShift. * Monitoring Applications: Zabbix, SolarWinds, Home Made Custom Tools, Nmap, Packet Tracer (Wireshark). * Routing & Switching and Wireless Technologies: Cisco, Mikrotik, Juniper, FS, Arista. * Security: Cisco, PaloAlto, Meraki, FortiNet, Ubiquiti, VMware MDM. * Datacenter, Cloud Computing, Cloud Native, Virtualization & HCI Solutions. * 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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    Machine Learning
    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
    VMWare
    Virtualization
    Cisco
  • $40 hourly
    I am a Dynamic, Dedicated, Passionate and Quickly Adaptable Freelancer with Technology along with ✅100% JSS ✅ 60%+ Long-Term Clients ✅ 80%+ Clients Recommendation ✅ 65+ Active and Completed Jobs with Positive Feedback🏅Architect Certified on Sophos and Fortinet ✅ Others Certification on Network and Security 🏦 Long-Experience with MSP, Corporate and Solution/Service-Provider Sectors. Here, I would like to share my Working experiences, fields of expertise and much more- ☑️ I have 9 years plus hands-on experiences on Network, System, Security administration, Deployment and Migrations on different Infrastructures along with direct involvements/cooperation on different known issues from Deployment stage to end-user’s support. ✅ Fields of Specialization: 1. Because of having 8 years plus exclusive experiences on different Fortinet Infrastructures Deployments and Administration I can work with the Complete Design, Deployments, Migrations and Integrations on these Different types of Fortinet Infrastructures such as- • Fortigate, Forti-APs, Forti-Switches, FortiVoice-Enterprise, Forti-Manager, Forti-EMS,FortiAnalyzer, FortiAuthenticator, FortiNAC, Fortinet Security Fabric Devices, FortiSandbox, FortiToken/Mobile/Service. 2. I have strong experiences on these Devices and Technologies as well. • Sophos and Sophos Central (Cyberoam & XG Firewalls, REDs, Endpoints, XDR, MDR) etc. • SonicWALL, Palo-Alto, Barracuda, PfSense and Others Firewalls. • Cisco-Firepower, Firepower-Thread Defence and FMC. 3. Long experiences on the Network and System Administration on these Infrastructures- • Routing & Switching on Cisco, Mikrotik, Juniper etc. • Wireless Implementation on Cisco, Aruba, Ruckus, 4Ipnet, Unifi/Ubiquiti, Forti-AP, Cambium, Altai, TP-Link-Omada etc. • Mail-Server Administration on Office365, G-Suite by Google, Zimbra etc. • Windows Server Solution (Active Directory, DNS, File-Server, WSUS) etc. • Virtualization & Datacentre Managements on VMware, ESXi, vSphere or VCenter, Hyper-V, Synology-NAS/SAN and Others. • Voice Solution implementation on renowned Voice Solution Providers such as FortiVoice Enterprise, Grandstream, 3cX, Synway, Yeastar-PBX, FreePBX etc. • Endpoint Solution Deployments on TrendMicro, Sophos Endpoint Protection, FortiClient by Forti-EMS (Endpoint Management Server) etc. • Complete Video Conferencing Solution on Dahua, Polycom etc. • Surveillance, Attendance reader solution on Hikvision, Dahua, ZKTecho, Handuri etc. 4. I am a quick and dynamic learner. I can adjust myself with the Technological innovation within a very short amount of time. 5. I am a technical person with a Never Give-Up character. Here I am adding some of my clients valuable Feedback. It might help you to decide on me. 🏅Feedback on Fortinet-Infrastructures from a long-time contract "Provides best practices & suggestions. Met the goal. Completed the deployment accordingly. Always available for any emergency situation. I totally recommend Norul!" "Norul has done multiple jobs for us and still. He has always exceeded expectations. Always professional. Highly recommend!" 🏅Feedback on Sophos and others Infrastructures from a Long-Time Contract (A MSP in SA) "Absar has done a very good project for us. He already completed 20+ Sophos Devices Upgrades and along with several others Deployments and Migrations related tasks and is still working with us. He already become a very reliable Freelancer for our company and I hope we can continue this journey for much longer. He is highly skilled on different UTM base Next Generation Firewalls especially on Sophos, Fortinet, SonicWall, PfSense and others. He is also working with us on different Network and System related Troubleshooting and Support. I highly recommend him." Others are "Great Sophos Expert to work with. A great professional. Would like to engage him on future projects." 🏅Feedback on SonicWALL Firewall's related project "Very smart, knowledgeable and quick to respond. Highly recommend him." I have several valuable feedbacks with great reviews on Upwork. You can also have a look on that. 🎖️Certifications (Completed & Enrolled) • Certified Architect by Sophos. • NSE-7 (Network Security Architect) –NSE-ID:- 0Qjbf0qGSd • Sophos-Firewall v19.5-Engineer. • Sophos Firewall v19.5-Architect • NSE-4 (Network Security Professional) – NSE-ID:- GThFxY1viO • Sophos Central Endpoint and Server v4.0-Engineer. • Central Endpoint and Server v4.0-Architect. • NSE-5 (Network Security Analyst) on FortiAnalyzer- NSE-ID: - 8gIRCniwPN. • NSE-1 (Network Security Associate) By Fortinet License Number: OYBF7cetpL • NSE-2 (Network Security Associate) By Fortinet License Number: FTsFjlmHck • CNSS (Certified Network Security Specialist) By ICSI, UK License Number: 18427811 • Cisco Certified Network Associate (Routing & Switching) Cisco-ID: - CSCO13303817
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    SonicWall
    PfSense
    System Administration
    VoIP PBX
    Sophos Sophos UTM
    Security Management
    Wireless LAN Controller
    Palo Alto Firewalls
    Security Infrastructure
    FortiGate Firewall
    Network Administration
    Fortinet
    Firewall
    Network Security
  • $35 hourly
    I have over 22 years of experience designing and developing robust and scalable Wi-Fi routers and cloud application. I have 5 years of onshore experience working with top MNC's like Cisco, Comcast and Cognizant. I was a key member of the Comcast's xFi cloud platform team and AT&T's Digitallife home automation platform team. RDK-B / openSync / openWrt / openWiFi / prpl Easy Mesh / Hotspot / Captive Portal / Kubernetes / LXC / openNDS Kernel Driver / Linux networking / IPv4 / IPv6 / Embedded Systems TR 181 / TR 069 / TR 157 / ACS Wi-Fi / BLE 5.1 Kafka / Node/ Socket.io AI/ML/RL/Pytorch REST API's MONGO / SQL Our team is one of the best home Wi-Fi router development team in the world.
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    Embedded Linux
    Bash
    Firewall
    Firmware
    Embedded System
    Machine Learning
    Network Engineering
    WiFi
    Router
    Reinforcement Learning
    OpenWrt
    Python
    PyTorch
    C
  • $45 hourly
    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
    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
  • $76 hourly
    Meraki Certified Network Operator and Firewall Network engineer, I have many years setting up and configuring, VPN, SD-WAN and remote locations Meraki and Cisco Switches and networking. Fortinet Firewall setup and config with remote locations and firewall filtering. User VPN setup and configure. Firewall rules and filtering. Nimble SAN Storage server setup and config with VMWare Esxi 5.0-6.7 setup and config with ISCSI connectivity for system storage profiles. Switches, Cisco Aeronet, Meraki, Ubiquiti and Motorola wireless, Nuuo video monitoring and LifeSize video conferencing. Troubleshoot TCP/IP, DNS, WINS, DHCP and VPN. Support and maintain computing services including Windows Hyper-V and IBM iSeries and System X servers, VMWARE Esxi 5.5-6.5. Server, 2003-2019 Citrix XenApps, and Windows environment. Troubleshoot EDI transactions in Data Masons Vantage Point and Liaison AS2. Administer Office 365 mail and apps.
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    Citrix Hypervisor
    MikroTik RouterOS
    OpenWrt
    VMware ESX Server
    VMware vSphere
    Security Infrastructure
    PfSense
    Avaya
    Internet Protocol Security
    Juniper
    Network Equipment
    macOS
    Cisco Meraki
  • $25 hourly
    BE in Electronics and Telecommunication with 20 years of experience in Firewall, Networks. VOIP, Wireless. Datacenter, Servers etc Security: Cisco ISE, Cisco Firepower, Cisco ASA 5500, Cisco Meraki, PaloAlto, Checkpoint, Sophos, Fortigate, Dell Sonicwall, Juniper, PFSense, Rapid7, Watchguard, Barracuda SEIM: Solarwinds, Wazuh, Splunk Network: - Cisco, HP, Brocade, Juniper, Zylex, Microtik, GPON/EPON, Ubiquiti VoIP: Cisco, Avaya, Asterisk, FreePBX, 3CX, Microsoft Teams, Grandstream Wireless: Cisco, Ubiquiti, Mojo (AirTight), Aruba, Video: Cisco Telepresence MX200/300/SX20, Telepresence Server, Telepresence Conductor Server, Avaya Scopia XT Data Center: VMware vSphere 7.x, Cisco UCS, Microsoft Hyper V, Citrix Xenserver, Oracle Virtual Box Applications: Microsoft SCCM, MS SQL Server, WSUS, Radius Server, Squid Proxy Server, Keypass, Wordpress Cloud: Amazon Web Services (AWS), Google Cloud platform, Microsoft Azure Cloud Storage: NetApp, Western Digital Routing Protocol: OSPF, EIRGP, BGP, RIP. Network Tools: Wireshark, Solarwinds, Netflow, PRTG, Cacti, Scrutinizer, Logzilla, Wazuh Operating System: Windows 2012/2016/2019, CentOS, Ubuntu
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    VoIP Administration
    Asterisk
    Cisco CallManager
    Cisco ASA
    Cisco UCS
    Microsoft Active Directory
    Cisco Router
    Sophos Sophos UTM
    Fortinet
    Juniper
    Cisco WLC
  • $55 hourly
    🟢🟢🟢🟢🟢 Hello! I am an accomplished Full Stack Developer with over 7 years of expertise in crafting cutting-edge web and mobile applications. My journey began as a back-end developer, and I have since mastered the art of developing robust web and mobile apps that deliver seamless user experiences. I have a strong command on following technologies and tools: ☑React Native, Flutter for mobile app excellence ☑Kotlin, Swift for dynamic mobile experiences ☑REST API & Redux ecosystem for efficient data flow ☑Firebase for scalable and real-time applications ☑Jest for rigorous testing ☑NODE JS, NEST JS for powerful backend development ☑Python, Django for versatile scripting ☑MySQL, MongoDB, Redis, Elasticsearch for robust data management ☑Docker, Vagrant for seamless deployment ☑Nginx, Haproxy for optimized performance ☑Various AWS services for scalable cloud solutions ☑Git, GitHub, Bitbucket for streamlined version control ☑Strong HTML & CSS skills for pixel-perfect designs ☑PHP, Laravel, Symfony ☑ WordPress, Shopify As a Python AI/ML developer specializing in data science and deep learning, I am dedicated to delivering high-quality solutions that leverage the power of artificial intelligence and machine learning for businesses. With a strong computer science background and hands-on experience in developing state-of-the-art AI models, my services encompass a wide range of tasks including data analysis, predictive modeling, natural language processing, and computer vision. I am passionate about providing intelligent solutions that generate actionable insights and drive improved business outcomes. Areas of expertise in Python AI/ML developer: 🚀 Image analysis, classification, and detection: I utilize vector databases and image analysis models to create hashes and perform image matching, enabling precise and efficient image analysis. 🚀 AI bots trained on custom language models: By leveraging GPT3 models and training them on specific datasets, I create AI bots capable of engaging in deeper and more tailored conversations. 🚀 ML - computer vision: I excel in tasks such as segmentation, classification, and object detection, leveraging advanced techniques and tools like PyTorch, Keras, ResNet50, OpenCV, and TensorFlow. Programming languages and tools I am proficient in: ✔️ Python ✔️ R ✔️ PyTorch ✔️ Keras ✔️ ResNet50 ✔️ OpenCV ✔️ TensorFlow ✔️ SQL ✔️ OpenAI I am committed to delivering innovative AI solutions that drive business growth and efficiency. Let's collaborate to unlock the full potential of artificial intelligence in your organization.
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    PHP
    API
    Network Security
    iOS Development
    WHMCS Development
    Android App Development
    CSS
    Data Mining
    HTML5
    Mac OS App Development
    Firewall
    Internet Protocol Security
    OpenVPN
    Machine Learning
    Python
  • $110 hourly
    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
  • $120 hourly
    I specialize in building, designing and troubleshooting network infrastructure and transport. Wired, Wireless, LAN, WAN, VPN and Security solutions to fit your business needs. I have been employed as a Network Engineer for Snapchat, Fortinet, Nuance Communications, Port of Seattle, Infospace, and Costco Wholesale. As a consultant I have worked on network and firewall projects as part of the AT&T consulting team for the State of Texas, New York Yankees and HP Enterprise. As a Professional Services Engineer for Fortinet, I deployed hundreds of Fortinet appliances for a large-scale IPSec VPN deployment for the State of Washington. Vendor Certifications include: Cisco CCNA, CCNP, Fortinet NSE4, NSE5, CWNA, Ekahau ECSE Design, Juniper JNCIA, and ITIL Foundations.
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    Google Cloud Platform
    F5, Inc.
    Cisco Certified Network Associate
    Network Security
    Wireless Communication
    Network Design
    Ubiquiti
    Extreme Networks
    Network Engineering
    Fortinet
  • $40 hourly
    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 - 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 - 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
  • $60 hourly
    [Hey There] You might be wondering why there’s [ ] at the beginning? Nope, that’s not typographical error, that’s how we code in AppSheet! Maybe you are asking yourself now, why should you use Google AppSheet for your business? ✅ Ease of use ✅ Quick turnaround of a working app ✅ Can be used in all types of devices (Web, Mobile, & Tablet) ✅ Free to use if you have Google Workspace Enterprise Plan ✅ Has great support system via chat or AppSheet community Now, please allow me to share the businesses and industries that I’ve worked on in the past 4 years 🖥️ Asset Management 👷 Construction 👨‍💼 CRM 💰 Financial Services 🏋🏻‍♀️ Gym/Workout Management 🏛 Government Services 💼 Human Resources 🪖 Incident Management 🔍 Inspection Services 📦 Inventory Management 🏭 Manufacturing 📁 Project Management 📷 Rental Shops 👕 Retail Industry Before you scroll down to check my reviews, I just want to share one quote that I've learned from one of my biggest clients. “TIME IS MONEY” What does it mean? If you saved time… 🕐 …you can increase the efficiency of your business 🕐 …you can cut down the working hours of the employees 🕐 …you can deal more clients Now, are you ready to automate your business processes? Let's hop in a zoom call and have a chitchat while drinking beer 🍻
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    Mobile App
    Zapier
    Mobile App Design
    Data Visualization
    Make.com
    Mobile App Development
    AppSheet
    iOS Development
    Google Sheets
    Looker Studio
    Microsoft Excel
  • $50 hourly
    Experienced Network Operations Center Team Lead with a demonstrated history of working in the information technology and services industry. - expert in building vpn platforms - expert in Networking, Cisco Systems Products( R&S, Security and Collaboration). - expert in Palo alto , Fortinet, PFSense firewalls, Mikrotik router, VPN - very good experience in Vmware ESXi, Ubiquity, Unify , windows Servers - very good exprience in cloud (AWS, GCP, Azure, Oracle OCI) - very good experience in linux -very good experience in docker, kubernetes -very good experience in git, ci/cd - Strong Development Skills specially network development(C#, .net web API , asp.net mvc) - .net core web api, microservices, rabbitmq, Rest API, EF
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    Virtual Private Server
    PfSense
    Cisco Router
    Cisco Certified Network Professional
    .NET Core
    Cisco CallManager
    C#
    MikroTik RouterOS
    Cisco ASA
    .NET Framework
    Network Security
    Network Design
    Ubiquiti
  • $50 hourly
    I'm a full-time writer with magnificent skills in nearly all kinds of writing. You can probably turn a hill into dust with whatever wand you've got, and that's what I can do with my pen, or you know, my keyboard. There is nothing anywhere that I can't put into a never ending imagination of beauty. My native English writing and speaking skills, as well as the high quality work I produce, have made me a favorite for a number of clients who continue to hire me back for additional projects.
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    Cryptocurrency
    Scripting
    Tech & IT
    Internet Security
    SEO Writing
    Blog Writing
    Scriptwriting
    About Us Page
    Search Engine Optimization
    Content Writing
    Creative Writing
    Technical Writing
  • $55 hourly
    Over 28 years of programming experience with 21 years of business development. The 64-bit era: iOS / Objective-C & Swift & C++ / Xcode(Cocoa & CocoaTouch framework) Linux(CentOS & Ubuntu) + Apache + MySQL + PHP full-stack design/development. Major iOS app(with server) design/development. The 32-bit era: MacOS 9 & MacOS X / C++ / CodeWarrior(Carbon framework) & Xcode(Carbon framework) Red Hat & Ubuntu / C++ / vim & gcc & gdb Windows XP & Windows 7 / C++ / C++ Builder 6.0(VLC framework) & Visual C++ 6.0(MFC framework) Major Cross-Platform framework/SDK, MacOS X app design/development. The 16-bit era: MS DOS/Turbo C 2.0
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    C++
    Apple Xcode
    Network Security
    iOS Development
    MySQL
    Objective-C
    Swift
    System Administration
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