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Check out Zimbra Administration specialists with the skills you need for your next job.
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  3. System Administrators
  4. (Current) Zimbra Administration Specialists
  • $35 hourly

    • 5.0/5
    • (165 jobs)
    A satisfied client is the goal of my work. I have over 10 years of experience with many operating systems. I have experience in configuring, monitoring, updating and maintaining system hardware, software and related infrastructure. I have strong analytical skills. I can work with technologies from a variety of engineering disciplines to troubleshoot complex system-level problems. I am motivated, dedicated to my work, responsible for solving the tasks assigned to me. Business before pleasure!
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    Plesk
    cPanel
    Proxmox VE
    Microsoft Windows
    Linux
    Docker
    Virtualization
    Azure DevOps
    Microsoft Azure
    AWS Systems Manager
    AWS Server Migration
    System Administration
    Network Security
    Cloud Engineering
  • $40 hourly

    • 5.0/5
    • (124 jobs)
    I have 30+ years experience in network projects including design, implementation, system administration and in software development. For the first 5 years of my career I worked on software development: coding and especially testing. For the last 28 years I'm working on implementation and maintenance of University of Nis WAN. Last 25 years I'm deeply involved in AMRES (Academic Network of Serbia) project. Don't fix it if it ain't broken, don't break it if you can't fix it! SKILLS SUMMARY - Any system administration tasks - Operating Systems: any *nix (Linux, FreeBSD, SGI IRIX, SCO, Solaris, OSX), Windows 3.1/9x/Me/XP/Vista/W7/W8/W10, WinServer NT/2K/2003/2008/2012/2016 - LAN & WAN: Ethernet, Fast Ethernet, Gigabit Ethernet, FDDI and Wireless LANs. T1/T3, SDH/SONET, Frame Relay, WDM, ISDN, ADSL, SHDSL, Cable Modems, Cellular, X.25. - Network Protocols: TCP/IP, IPv6, UDP, OSI, CDP, IP Multicast, IPSec, VoIP, Routing, VLANs, Bridging, Trunking, VPN, SNA, DLS - Network Services & servers: SMTP/POP3/IMAP, FTP/SFTP, Telnet/SSH, HTTP/HTTPS, DNS, DHCP, NNTP, NTP, LDAP, SNMP, NETBIOS, Apache, Nginx, MySQL, Plesk, cPanel, Zimbra, VMware, CentOS, Ubuntu, Debian - Network Equipment: various types of modems, firewalls, switches and routers. - Dedicated, VPS and cloud environment servers (Amazon AWS, Google Cloud, MS Azure, Digital Ocean, Linode). - Programming Languages: Unix Shell scripting, BASH, C, Pascal, MS Visual Basic, PHP, HTML, (a bit of Python).
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    CentOS
    Ubuntu
    System Administration
    Apache Administration
    SSL
    Let's Encrypt
    Linux System Administration
    Firewall
    Red Hat Administration
    Internet Security
    Cloudflare
    Unix System Administration
    Network Security
    Network Administration
  • $15 hourly

    • 5.0/5
    • (21 jobs)
    I am a completely fluent in the skills of Linux (Red hat, Centos and Ubuntu) from last 12 years. I have good experience with AWS solution, security architect and I have been working as a Sr. System Administrator for last 8+ years,. I have good experience in the areas of Linux system admin. Experience in planning and implementing Zimbra Email Solutions for various industries like Banking, Education, Insurance, IT, Pharmaceuticals, SME’s, etc. I am a hard worker and enjoy working at all critical conditions. If hired by you I will be responsible to complete the task within the stipulated time frame and with most confidence. Outsource me for your project and I promise to bring in the best output. My experience includes: • Server OS Linux Platform: Ubuntu, Debian, Centos, Redhat. • Cloud Servers: AWS • CMS: Joomla • Scripting: Bash • Monitoring tools: Zabbix • Web servers: Apache, Nginx • SSL: Letsencrypt, Comodo, Symantec, Digicert, self singed, or any other SSL • Email servers: Zimbra, Postfix, Sendmail,Qmail • Email deliverability: PTR, SPF, DKIM, DMARC. • Joomla: installing, migrating, troubleshooting. • Firewall: Linux iptables. Fail2ban • Other Application Server: DNS, FTP, DHCP, OpenVPN, PPTP, Proxy, Samba etc. • Moodle: installing, migrating, troubleshooting. • Koha: installing, migrating, troubleshooting. Zimbra Services. 1) Installation of Services 2) Modification 3) Migration from Gsuite, O365, Axigen, Icewrap, etc. 4) Up-gradation to Latest Version 5) Integrating with third party platform. 6) Zimbra Hosting on Cloud Platform.
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    Linux System Administration
    Zimbra Collaboration Suite
    Web Hosting
    MySQL
    Virtual Private Server
    Domain Migration
    Water Solutions Koha
    WordPress
    Email Security
    Joomla
    PostgreSQL
    Data Migration
    Moodle
  • $30 hourly

    • 5.0/5
    • (13 jobs)
    - Ten years work with Liferay from version 5.2.3 - Five years work with Spring Boot framework - Clean code, focus on testing to make code have more code coverage - Can do UI and DevOps --------------------- LIFERAY + Can work with Liferay 5.x: hook, ext, theme. JSR-168, JSR-286 + Work with Liferay 6: custom portlet, ext, theme + Work with Liferay 7: OSGi, module, custom portlet --------------------- SPRING BOOT + Design APIs in Swagger + Implement APIs in Spring Boot + Implement all kind of test: JUnit, Gherkin (for function test), Smock Test, Gatling (for Performance Test) + Check code security with SonarLink in IntelliJ + Make script for CI/CD use Jenkin, Azure + Hibernate Index Search, Lucene Search + Work with JSONB in PostgreSQL --------------------- IDE and Others + Can work with: IntelliJ IDEA, Eclipse, Liferay Studio + OS: MacOS, Win and Linux
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    CI/CD
    Liferay
    Hibernate
    Java
    Automated Deployment Pipeline
    Spring Framework
    PostgreSQL
    MySQL
    API
  • $30 hourly

    • 4.1/5
    • (77 jobs)
    I am a Senior System Administrator and VoIP Engineer with over 7 years of expertise in deploying and managing Class 4-5 Grade VoIP Softswitch platforms such as PortaOne and VoIPSoft-Switch, as well as hosted PBX systems, including both multi-tenant and stand-alone setups. My core competencies include VoIP systems based on Asterisk (e.g., FreePBX, AsteriskNOW, Issabel, Elastix), Freeswitch (e.g., FusionPBX), Grandstream UCM, and Linux environments (CentOS 7, Ubuntu). I also have extensive experience with 3CX solution design. In addition to my VoIP skills, I have a strong background in networking, particularly with firewalls and security solutions. I am skilled in configuring and managing Fortigate, Sophos, and SonicWall firewalls to ensure secure and optimized network performance. I excel in designing complex call routing using 3CX Call Flow Designer, creating interactive IVR systems with database integrations, and managing cloud services like MS 365, Azure, and AWS. My certifications in VMware Data Center Virtualization (vSphere 6.7) and Red Hat further strengthen my capabilities in virtualization and system optimization. Throughout my career, I have led various large-scale projects, including deploying a 2000+ user mail server using Zimbra and Postfix, implementing data center virtualization, and deploying VoIP platforms using Elastix and FreePBX for banks and IT companies. I hold a Bachelor’s degree in Electronics and Telecommunication and a Master’s degree in Computer Science. I am passionate about building user-friendly, cutting-edge websites and system applications, and I continuously explore new technologies to stay ahead of industry trends, delivering robust and sustainable solutions. Thank you for considering my profile.
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    VoIP Software
    Elastix
    VoIP PBX
    3CX
    VoIP Administration
    Virtualization
    Network Engineering
    Asterisk
    FreePBX
    VMware Administration
    VICIDIAL
    Linux System Administration
    Microsoft Azure
    CentOS
  • $40 hourly

    • 5.0/5
    • (108 jobs)
    10+ years of professional experience in the Cloud and ISP industry. Certification: 🥇 Certified Kubernetes Administrator (CKA) 🥇 Red Hat Certified Engineer (RHCE) 🥇 Red Hat Certified System Administrator (RHCSA) 🥇 Red Hat Certified Specialist in Virtualization (RHCVA) Skills and Specialties: # OpenStack, Proxmox, KVM, Docker, Kubernetes, AWS. # Ceph, TrueNAS, ZFS, GlusterFS, iSCSI, NFS. # Email Server, Web Server, DNS Server, cPanel/WHM, NMS, etc. # Asterisk, FreePBX, Vicidial, FusionPBX, Voice Gateway, SS7 Media Gateway.
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    Kubernetes
    DevOps
    Dovecot
    IPv6
    Exim
    Asterisk
    Elastix
    FreePBX
    VoIP Administration
    Linux System Administration
    VICIDIAL
    Virtual Private Server
  • $25 hourly

    • 5.0/5
    • (35 jobs)
    Hey! I am Sohel Rana, I am a Email Migration, DNS Records Management & Email Deliverability Expert and Consultant. I have 10+ of years Industry working experience. My Focused and Main Expertise on Business Domain Email Configuration (Google Workspace, Microsoft Office 365, Zoho, Namecheap Private Email, Bluehost Professional Email, GoDaddy Pro Email, Ionos Webmail, Titan etc.), Email Migration, DNS Records Management and Email Deliverability!!! also Domain Domain Branding and Pointing. Expertise Email Platform:- Create Business Email & Migration Email including Old Mail Data (Email, Contact, Calendar and Files) 1. Google Workspace 2. Microsoft Office 365 3. Zoho Workplace 4. Zimbra Email Collaboration Suite 5. GoDaddy Professional Email and Hosting Webmail 6. Namecheap Private EMail and cPanel Webmail 7. Bluehost Professional Email & cPanel webmail 8. Titan, Ionos webmail Domain & DNS Records Platform Expertise 1. GoDaddy 2. Namecheap 3. Ionos 4. Bluehost 5. Siteground 6. Squarespace 7. Wix 8. Shopify 9. Hostinger 10. HostGator 11. Domain.com and similar service proder
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    CentOS
    VMware ESX Server
    Web Hosting
    Mail Server Implementation
    System Administration
    Email Support
    cPanel
    Email Deliverability
    GoDaddy
    Office 365
    Linux System Administration
    Google Workspace
  • $60 hourly

    • 5.0/5
    • (346 jobs)
    With over two decades of industry expertise as an Infrastructure and Cloud Solutions Architect, with Microsoft Certified Azure Solutions Architect Expert, I contribute extensive knowledge to each project I engage in. My primary goal is to provide clients with top-notch technical solutions and support, prioritizing the establishment of enduring relationships and the continuous delivery of value. I am a full-time independent consultant, and I am passionate about leveraging my skills to help businesses succeed in today's rapidly evolving digital landscape. I am open to both short-term and long-term projects and ad-hoc support. I pride myself on my ability to work closely with clients to identify their specific needs and deliver tailored solutions that meet their unique requirements. My extensive experience includes technical support, Infrastructure Management, Cloud Computing, and Network/System Engineering. I am proficient in a wide range of products and technologies, including ✅ Microsoft Azure Solutions Architect, ✅ Azure Virtual Desktop ✅ Microsoft 365 (Office 365) Tenant to Tenant migration (Email, Teams, Onedrive, and SharePoint ✅ Microsoft Exchange Server [All Versions] and Exchange Online ✅ Microsoft 365 (Office 365) ✅ Migrate Microsoft 365 workloads such as Exchange Online, Sharepoint Online, teams, and OneDrive using Bittitan MigrationWiz, ✅ Remote Desktop Services (RDS) ✅ Microsoft Windows Server [All Versions], DNS, IIS ✅ Windows Server Remote Access VPN (SSTP, PPTP) and DirectAccess ✅ Hyper-V [All Versions] ✅ Microsoft Windows Active Directory [All Versions] ✅ SharePoint [All Versions] ✅ Microsoft SQL [All Versions] ✅ Dynamics CRM, Dynamics GP ✅ Lotus Domino/Notes ✅ Symantec Enterprise Vault ✅ Windows 7/8.1/10/11 ✅ Zimbra Mail Server ✅ Bittitan MigrationWiz Office 365 Migration . I hold several industry certificates, including Microsoft Microsoft Certified for the following titles. ⚡️Microsoft® Certified: Azure Virtual Desktop Specialty ⚡️Microsoft® Certified: Azure Solutions Architect Expert ⚡️Microsoft® Certified Azure Administrator Associate ⚡️Microsoft® Certified Solutions Expert: Productivity ⚡️Microsoft® Certified Solutions Associate: Windows Server 2016 ⚡️Microsoft® Certified Solutions Expert: Exchange Server ⚡️Microsoft® 365 Certified: Teams Administrator Associate ⚡️Microsoft® Certified Solutions Associate: Office 365 ⚡️Microsoft® Certified Solutions Expert: SharePoint 2013 ⚡️Microsoft® Certified Solutions Associate, Windows Server 2012 ⚡️Microsoft® Certified IT Professional (MCITP) Enterprise Administrator: Windows Server 2008 IBM ⚡️IBM Certified Associate System Administrator Lotus Notes and Domino 7 If you're looking for a reliable and experienced Infrastructure and Cloud Solutions Architect who can deliver results and help your business thrive, please don't hesitate to get in touch. I look forward to the opportunity to work with you and help you achieve your goals.
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    Microsoft Hyper-V Server
    TCP/IP
    Microsoft SharePoint Administration
    Azure App Service
    HCL Domino
    Microsoft Exchange Online
    Microsoft IIS
    Microsoft Active Directory
    DNS
    Windows Server
    Microsoft Azure
    Microsoft Exchange Server
  • $38 hourly

    • 5.0/5
    • (601 jobs)
    Red Hat Certified System Engineer, having around 12 years of experience working in Linux environment and worked on many projects over the year involving Cloud and Dedicated servers. Knowledge of Enterprise Infrastructure technologies and architecture. Worked as consultant on various projects in the past to design and implement an environment which uses Linux and Clusters to run Applications. Os : Linux and Wondows server expert Cloud Services : AWS,GCP, Linode, ToggleBox Configuration : Ansible Containers : Docker/Kubernetes Relational Database Servers : MySql, Oracle, PostgreSql, MsSql,MongoDB DB Languages : Pl/Sql,Stored Procedures, SSIS Scripting Languages : Bash, Perl, Java No Sql Database servers : MongoDB Atlassian: Jira Web servers: Apache, Nginx, Tomcat Mail Servers : Zimbra,Postfix,Sendmail,Hmail,Dovecot Monitoring: Nagios, Zabbix, Monit, Munin, Cacti Virtualization: Openvz, Vmware/Vsphere ESXi/server, VirtualBox CMS : Wordpress, Magento firewalls: iptables, ufw Other: standard network services (DNS, DHCP, FTP, SVN/Git, http proxy, VPN, backups, monitoring etc)
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    Oracle PLSQL
    Windows Administration
    MySQL
    LAMP Administration
    PostgreSQL
    Linux System Administration
    MongoDB
    Unix System Administration
    Amazon Web Services
  • $25 hourly

    • 5.0/5
    • (42 jobs)
    ⚡️Top Rated Freelancer with 10+ Years of Experience in ISP Industries. ⚡️SMTP Smarthost Consultant, Google Cloud ⚡️Manager & Team Leader, System Administration, Amber IT Ltd. ⚡️Customer Satisfaction Guaranteed Hi I am shuvo and I am a professional system administrator working at one of the prominent IT company in Bangladesh. I have 8+ years of server administration/network administration experience. My day to day job at my company are configuring and troubleshooting mail server (Zimbra/Postfix/Sendmail etc). Email blacklisting check , network abuse check. To list some more, Web server, DNS server, Cacti server, Samba, iSCSI Server, NFS and so on. I can also work in virtualization like hyperV, vmWare ESXi (5.5, 6, 6.5) with vCenter, KVM etc. I can also work with Cisco Systems Routing/Switching, Mikrotik. I have completed some professional certifications from Cisco, Redhat.
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    SMTP
    Email Security
    Email Deliverability
    Proxmox VE
    Marketing Automation
    Email Marketing Strategy
    Email Campaign Setup
    MailWizz
    Postfix SMTP Server
    cPanel
    Zabbix
    Linux System Administration
    Server Virtualization
    DNS
  • $60 hourly

    • 5.0/5
    • (6 jobs)
    Welcome to my Upwork profile! I am a highly skilled Linux expert with a passion for web hosting and hosting panel management. With a wealth of experience in the IT industry, I take pride in delivering top-notch solutions to clients seeking reliable and efficient web hosting services. My expertise includes: ✓ Linux Administration: Proficient in setting up, configuring, and maintaining Linux-based servers, including CentOS, Ubuntu, Debian, and Red Hat. ✓ Web Hosting Management: Experienced in managing various web hosting environments, ensuring optimal performance, security, and seamless website operations. ✓ Hosting Panels: Expertise in working with popular hosting panels like cPanel, Plesk, DirectAdmin, Cyberpanel and Virtualmin, facilitating easy website management for clients. ✓ Server Security: Implementing robust security measures, including firewall setup, SSL integration, and regular security audits, to protect servers from potential threats. ✓ Website Migration: Seamless migration of websites and applications between hosting providers, ensuring minimal downtime and data integrity. ✓ Performance Optimization: Identifying and resolving performance bottlenecks to enhance website speed and overall server efficiency. My qualifications: - Bachelor's degree in Computer Science - Certification: RHCE, CCNA, CCNP, JNCIA, JNCIS - 15 years of hands-on experience in Linux administration and web hosting management for diverse clients and industries. - Excellent problem-solving skills and a strong commitment to client satisfaction. - A keen eye for detail and a proactive approach to foresee and address potential issues. I am dedicated to delivering the highest level of service and providing tailored solutions to meet the unique requirements of each client. Whether you need assistance in server setup, hosting panel management, or optimizing your web hosting environment, I am ready to help. Let's work together to ensure your web hosting infrastructure runs smoothly and efficiently. Feel free to reach out, and I'll be thrilled to discuss your project needs. Thank you for visiting my profile, and I look forward to collaborating with you! Best regards, Ganesh Dhungana
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    Asterisk
    Email Security
    Linux System Administration
    Juniper
    Network Security
    Cisco Router
    Data Center Operations
    VMware Administration
    DNS
  • $100 hourly

    • 5.0/5
    • (206 jobs)
    I am Microsoft Certified Solutions Expert Engineer with 18+ Experience In Designing, Implement, Managing, Migrate, Upgrade And Troubleshooting Active Directory, Office365, Azure, , Exchange Microsoft Server , SBS , SK4B , PowerShell Scripting , Hyper-V , VMWare Vsphere,Veeam
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    Windows Server
    Solution Architecture
    Microsoft Active Directory
    Microsoft Windows PowerShell
    Microsoft Exchange Server
    Microsoft Azure
    Office 365
  • $39 hourly

    • 4.9/5
    • (321 jobs)
    Hi, I am an experienced Network/Systems/Security/Cloud professional with a passion for technical support. I have 15 years of hands-on experience in multiple domains, including Google Workspace, Microsoft 365, Windows 365, Azure, AWS, and GCP. I specialize in migration services such as Gsuite to O365, O365 to O365 (One Drive to One Drive, etc.), and email migration. I am also proficient in Cisco Meraki, Mikrotik, Bitninja, WordPress Malware Protection, Contabo, Hetzner, Microsoft 365 Security Compliance, Microsoft Azure Virtual Desktop Environment (VDI), RDS Terminal Support, Gsuite Workspace, Azure VPN, AWS Console, AWS VPN, UBNT ubiquiti devices, Azure Cloud services, VPN services, Windows servers complete, DHCP, DNS, Active Directory, additional active directory, Hyper V, Vmware Certified hands-on experience expert, SSL configuration, Fortigate firewall, Cisco network switches, routers, firewall, network diagrams, network assessment, infrastructure high-level diagram cloud, and physical. In addition, I offer password reset services for Windows servers, Google Suite, AWS, Office 365 certified expert with hands-on experience (Microsoft Expert), cyber security expertise, port forwarding, access your application as you are in office support, remote O.S. installation support, NAS/SAN support all types, backup software VEEAM, etc. support, Microsoft Exchange deployment, and troubleshooting, Microsoft SQL troubleshooting. My technical expertise is complemented by my strong work ethic, passion for completing projects on time, and dedication to providing excellent customer support. I am a Microsoft Certified Solutions Expert, Azure Solutions Architect Expert, Azure Administrator Associate, and Azure Fundamentals certified. Additionally, I hold an AWS Certified Solutions Architect - Associate certification. If you are looking for a highly skilled and reliable professional to support your network/systems/security/cloud needs, then look no further. Please feel free to reach out to me for any inquiries, and I promise you won't regret it. Thank you for your consideration. Welcome to my profile! I am a Network/Systems/Security professional with 15 years of hands-on experience in multiple domains. My passion for technical support ensures that I always strive to provide the best possible standards and support for my clients. Here are some of the skills I have acquired throughout my career: AWS Workspaces and Active Directory Azure Virtual Desktop Environment Mikrotik Hotspot Gsuite Workspace Azure VPN AWS Console AWS VPN Migration of emails UBNT ubiquiti devices Azure Cloud services VPN services any Windows servers complete DHCP, DNS, Active Directory, additional active directory. Hyper V Vmware Certified hands-on experience expert SSL configuration Fortigate firewall Cisco network switches, routers, firewall Network Diagram's Network Assessment Infrastructure High-level diagram cloud and physical Password reset services for windows servers Google Suite AWS Office 365 certified expert with hands-on experience (Microsoft Expert) Cyber Security expertise Port Forwarding. Access your application as you are in office support. Remote O.S. installation support NAS/SAN support all types. Backup software VEEAM etc. support Microsoft Exchange deployment and troubleshooting Microsoft SQL troubleshooting I have a wide range of technical expertise, including Cisco routing and switching, Mikrotik routing and switching, Exchange/Active Directory migrations, Fortigate configuration, Unifi switches and Wi-Fi, Brocade switches, Barracuda Load Balancer, Microsoft all technologies, online desktop support, networking, system engineering, Windows Servers, Exchange Server, DNS, DHCP, DHCP Failover, Azure, Google Cloud, Alibaba Cloud, VMware, vCenter, high availability. Furthermore, I hold the following certifications: Microsoft Certified: Azure Solutions Architect Expert Microsoft Certified: Azure Administrator Associate Microsoft Certified: Azure Fundamentals Microsoft® Certified Solutions Expert: Productivity (Charter) Microsoft® Certified Solutions Expert: Messaging Microsoft® Certified Solutions Associate: Office 365 Microsoft Specialist: Server Virtualization with Windows Server Hyper-V and System Center Microsoft Certified Professional AWS Certified Solutions Architect - Associate I am committed to completing my work on time and ensuring that my clients receive the highest level of technical support. Contact me today to see how I can assist you with your network/systems/security needs.
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    Cisco Certified Entry Networking Technician
    Network File System Administration
    Migration
    RAID Administration
    Ubiquiti
    MikroTik RouterOS
    Microsoft Azure
    Cloud Security
    VMware Administration
    Microsoft Exchange Server
    DHCP
    WiFi
    Microsoft Hyper-V Server
    Cisco Router
  • $40 hourly

    • 5.0/5
    • (12 jobs)
    I help my clients web server security and get their email out of spam and into people's inboxes. I will help diagnose and spot issues, strategize and explain the next steps all during our consultation. ⭐️ Better Web Server Security ⭐️ Over the last 10 years, I have worked on 2500+ sites security and experiences range from setting up secure and scalable Cloud servers for your websites and apps to setting up SSL certificates, Email Servers, performing a complete audit of websites/servers cleaning the Malware/Virus code, hardening servers for security, blocking & preventing hackers intrusion, and Penetration Testing. * Malware / Virus Removal from Sites / Servers (URL Injection, SQL Injection, base64, etc) * Penetration Testing (Checking site code for security vulnerabilities) * Full Vulnerability Scan and remove all Malware or Malicious codes * Fix Suspended WordPress or any website by Hosting due to Malware Infection * Site Transfer/Migrate to New Host / Domain (Any PHP based CMS or custom-coded site) * Website / Server Security & Firewall Protection * Optimize & Increasing the Speed of Sites (Reducing Page Load Time) * Website Security and Maintenance (Implementing security measures to maintain security) Also Good Experience in Server Setup and Maintaining - ( Windows 2008/2012/2016; Linux/ Ubuntu / Redhat / Debian ; Apache / Centos / Nginx / Chef / Critix ; Cpanel/ Plesk / DirectAdmin/ WHM/ Webmin ) ⭐️ Better Email Deliverability ⭐️ * Implementation of fixes and recommendations from deliverability audit * Monitoring deliverability KPIs on a retainer basis and sending weekly deliverability reports * Managing IP and domain reputation (MxToolBox, EmailonAcid, ReturnPath, 250ok, etc) * DNS & authentication protocols (e.g., SPF, DKIM, DMARC, BIMI) * Take all active/reactive measures to ensure healthy email open rates * Reducing spam score * Signing feedback loop with ISP (Google Postmaster, Microsoft SNDS, ReturnPath, Yahoo/AOL) I firmly believe in "under-promise and over-deliver" and endeavor to take on all projects with a win-win attitude and high consideration for my clients' needs. I work well with both technical and non-technical audiences. Contact and invite me TODAY, so we can discuss your business and see how we can work together.
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    Mautic
    Email Deliverability
    Postfix SMTP Server
    MailWizz
    WordPress Malware Removal
    Web Hosting
    Linux System Administration
    Internet Security
    SQL
    Zabbix
    SSL
    Office 365
    DNS
    NGINX
  • $30 hourly

    • 4.9/5
    • (613 jobs)
    Enter a world where Cloud, Mail, System Administration and Security seamlessly blend. I'm your tech expert, orchestrating smooth IT operations and building robust, scalable cloud systems. My passion for safeguarding digital realms means I implement strong security measures and conduct thorough audits to fend off cyber threats. Join me at the cutting edge of technology and security, where simplicity meets strength. Offered Services: • Cloud Management: Navigate the clouds with proficiency in AWS, Google Cloud (GCP), MS Azure, DigitalOcean, Rackspace, OVH, and Vultr. Design and optimize scalable cloud environments with precision. • Web Hosting Servers: Command over Apache, IIS, Nginx, Tomcat, and HA Proxy ensures flawless web server management for optimal performance. • Mail System Management: Expertise in Postfix, Exim, MS Exchange, Zimbra, Windows SMTP, and MailEnable guarantees the smooth operation of diverse mail servers. Proficient in managing hosted mail systems like G-Suite, Office 365, Yahoo, and GoDaddy Mail. • Cloud Migration: Leverage the benefits of cloud computing by smoothly transitioning your data to platforms like AWS, Azure, Google Cloud, Office/Microsoft 365, G-Suite/Gmail/Google Workspace and Legacy Systems like IMAP. • Database Management: Navigate MySQL, MariaDB, MS SQL Server (All Versions), and Galera Cluster with finesse, ensuring robust and efficient database operations. • Security Best Practice: Champion cybersecurity with SSL/TLS implementation, PCI Compliance adherence, and penetration testing prowess. Guard against threats with an arsenal of security tools and techniques. • Control Panel Management: Navigate WHM/cPanel, Plesk, DirectAdmin, VestaCP, and CentosWebPanel for streamlined server administration and control. • Version Control System: Expert in Git and Subversion, ensuring smooth version control and collaborative development workflows. • Automation Management: Deploy automation with finesse using Puppet and AutoHotKey, streamlining repetitive tasks for enhanced efficiency. • CDN Management: Optimize content delivery with expertise in CloudFront, CloudFlare, and Incapsula CDN solutions. • Firewall Management: Implement robust firewall solutions with expertise in Cisco, FortiGate, Sonicwall, WatchGuard, and CSF, fortifying digital perimeters. • SSL/TLS Expert Services: I provide comprehensive solutions for digital security, including SSL certificate installation, protocol optimization, and vulnerability assessments, ensuring encrypted and secure online transactions. • Email Deliverability Enhancer Services: Maximize the effectiveness of your email marketing by optimizing deliverability through sender reputation management, authentication protocols and content relevance analysis, resulting in higher engagement and inbox placement rates. Why Choose Me: • Technical Versatility: Proficient in a variety of website platforms, CMS, and mail systems, ensuring adaptability to your unique tech stack. • Data Security Focus: Implement robust encryption and authentication measures to safeguard sensitive website and email data. • Minimized Downtime: Strategically plan migrations to minimize disruption, ensuring your online presence remains accessible and operational. • Client-Centric Approach: Collaborate closely with you to understand your business needs, providing personalized solutions and ongoing support. Take the journey with a skilled tech expert who seamlessly integrates diverse talents to build resilient and efficient IT environments. Let's collaborate to push the boundaries of technological excellence together.
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    Google Apps Script
    Web Host Manager
    DigitalOcean
    Mail Server Implementation
    Apache Tomcat
    Postfix SMTP Server
    SSL
    Cloudflare
    TLS1.2
    Website Migration
    Microsoft IIS
    Office 365
    Microsoft Azure
    Amazon Web Services
    Microsoft Exchange Server
  • $25 hourly

    • 4.9/5
    • (6 jobs)
    Experienced System Engineer with a demonstrated history of working in the information technology and services industry. Skilled in Linux System Administrator stuff (Server & Desktop) & Zimbra Collaboration System Implementation and Maintenance.
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    Mail Server Implementation
    Email Deliverability
    Technical Support
    Email Support
    Email Security
    Postfix SMTP Server
    SMTP
    Zimbra Collaboration Suite
    Linux System Administration
    Email Communication
    Linux
    DNS
    Ubuntu
    CentOS
  • $25 hourly

    • 5.0/5
    • (7 jobs)
    I am an experienced network & systems engineer, integrator and internet technologist. I have many years of experience of implementing and managing complex business systems, development projects and integrations. I am an efficient and methodical problem solver and troubleshooter. Some of my technical skills include: Linux, FreeBSD, Network, Firewall, Monitoring system Mail: Zimbra, sendmail, postfix, greylisting, proxmox mail gateway VOIP: Asterisk + bash (php) Jabber: ejabberd Web server: Apache, NGINX Databases: MySQL/MariaDB, LDAP Scripting: Bash, PHP Virtualization technology: libvirt(KVM), OpenVZ, VirtualBox, Proxmox HA: DRBD, ISCSI, Heartbeat, CEPH Network: iproute2, iptables, Pf. openvpn Firewall: Iptables, PF Monitoring system: Zabbix Web hosting: ISPManager, Plesk For Developers Redmine
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    Multiprotocol BGP
    Proxmox VE
    Plesk
    Firewall
    LAMP Administration
    Asterisk
    Network Administration
    Zabbix
  • $20 hourly

    • 5.0/5
    • (19 jobs)
    Since 2011, I’ve carved out a niche as a dedicated IT professional with a passion for both Linux and Windows systems. I specialize in creating resilient IT infrastructures and am committed to leveraging my dynamic expertise to solve complex technology problems. Key Strengths: Ubuntu, Debian, Centos, AlmaLinux. Redhat Nextcloud Email Server Zimbra Matrix Synapse Chat Server VPS Hosting Webhosting Apache, Nginx Gitlab Gerrit Rsyslog Server Collabora Nextcloud Office Signaling Server Jitsi Meet Wordpress & Laravel Deployment Phpmyadmin SMTP Server Postfix OpenVPN Community Edition SSO OpenLDAP Taiga Project Management Tool Deployment Cronjobs Guacamole RustDesk Nagios Core PHP multiversion NGINX and Apache Reverse Proxy Rocketchat Tomcat Digital Ocean Linode VPS Hosting Linux Complex Troubleshootings Webmin Virtualmin DNS SPF, DMARC, DKIM, MX Records Google Workspace And Goddy Domains Integration WHM Cpanel Plesk Wordpress Deployment / Migration Email Deliverability
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    DNS
    Server Administration
    Linux System Administration
    Apache HTTP Server
    Apache Administration
    NGINX
    OpenVPN
    Debian
    Ubuntu
    DigitalOcean
    Linux
    Web Server
    GitLab
    System Administration
  • $70 hourly

    • 4.7/5
    • (213 jobs)
    6+ years as DevOps 8+ years as Virtualization / Cluster Expert 12+ years as Linux/BSD administrator 15+ years as Network Engineer 16+ years as Systems Administrator I can help you with: ➢ Virtualization: KVM, Xen, OpenVZ, LXC, LXD, FreeBSD Jail, Proxmox, VDSmanager, Docker ➢ Management: Proxmox, OpenNebula, OpenStack, oVirt ➢ Storage: CEPH, LizardFS, DRBD, SCSI, ISCSI, SAN, NAS, LUNS, ZFS ➢ Orchestration: Puppet, Foreman, Ansible, Chef, Salt ➢ High availability: Corosync, Pacemaker, MySQL cluster, Multipathing, Bonding ➢ Monitoring: Zabbix, Monit, Cacti, ELK(Elasticsearch+Logstash+Kibana) ➢ Backup & Archiving: Bacula, rsync
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    DevOps
    Linux System Administration
    Proxmox VE
    Unix Shell
    Storage Area Network
    Cloud Computing
    Network Administration
    Docker
    Zabbix
    Virtualization
  • $60 hourly

    • 4.8/5
    • (26 jobs)
    Support and development on asterisk, vicidial, goautodial, fusionpbx, freeswitch Linux System Administration ( CentOS, Debian, Ubunut) Database Management (Mysql, PostgreSQL) Network Administration (Router, Switch, Hardware Firewall)
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    VoIP
    Linux System Administration
    VICIDIAL
    PHP
    MySQL
    FreePBX
    Network Administration
    Android
    A2Billing
    iOS
    FreeSWITCH
    Asterisk
    Customer Relationship Management
    Mobile App
    Session Initiation Protocol
  • $50 hourly

    • 5.0/5
    • (263 jobs)
    ⭐⭐⭐⭐⭐ 5-Star Rating ✅ A Top 3% Performer on Upwork ✅ 100% Job Success Score ✅ Top-Rated Plus Talent ✅ Microsoft Certified ✅ 5+ Years Senior Experience At Premier MSP ✅ Reliable, Professional, Friendly My Expertise: ⚡️ Microsoft Windows Server ⚡️ Microsoft/Office 365 ⚡️ Project Management/Delivery ⚡️ VMWare ESXi & Hyper-V ⚡️ Email Deliverability (DNS, SPF, DKIM, DMARC) ⚡️ Connectwise Manage/Automate/Sell, NinjaRMM, IT Glue ⚡️ Modern Workplace Adoption ⚡️ Web Hosting/SSL/DNS/Wordpress I am a Microsoft IT Engineer & Project Manager recently transitioned full-time into freelancing so as to focus on providing great service across the globe. I am a reliable and trustworthy IT Professional with a wide array of experience across sectors and technologies (Education, Legal, Hospitality, Finance, etc.). With me, you are sure to get a great solution to whatever problem or challenge you face. I will never submit a proposal for a job I know I can't do, and I take great pride in delivering a top notch result for anyone who hires me which is evident by my perfect Job Success Score and 5-star job ratings. I look forward to speaking to you about your specific project requirements soon, thanks for choosing to view my profile.
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    Microsoft SharePoint
    Microsoft Active Directory
    Microsoft Teams
    Office 365
    Microsoft Office SharePoint Server
    Windows 11 Administration
    Mail Server Implementation
    Windows 10 Administration
    Solution Architecture
    Microsoft SharePoint Administration
    Microsoft Outlook
    Solution Architecture Consultation
    Microsoft Hyper-V Server
    Microsoft Exchange Online
  • $35 hourly

    • 5.0/5
    • (87 jobs)
    Hi... I'm Henry Kusdaryanto. I'm a Consulting Engineer * Proud of Thinkpad T430 and X230 user * Windows, Linux and Hackintosh user * Linux distros: CentOS, FC, RHEL, Debian, Ubuntu * Linux software: Iproute2, Iptables, LDAP, Apache, Lighttpd, Nginx, MySQL/MariaDB, Samba, DNS, FTP, SNMP, Cacti, Nagios, Postfix, Qmail, Exim, Dovecot (+Sieve), Webmail, Rspamd, ClamAV, Plesk, CPanel, git and more * Virtualization: Virtualbox, Proxmox, OpenVZ, Xen, VMWare * Networking: Routing (Static Routing, BGP, OSPF, EIGRP, RIP), VRF, Switching, Multicast, NAT, IPSec, IPv6, Security * Scripting: Shell, Python, PHP * Control Panel: VestaCP, Ajenti, Cpanel and more * Cloud Environment: AWS, GCP, Digital Ocean, Arubacloud and more * Hardware: Cisco, IBM, HP, Huawei, Mikrotik, Ubiquiti, Juniper and more Certifications: * MCP in Small Business Server * CCNA(Cisco Certified Network Associate) *Expired* * JNCIA(Juniper Network Certified Internet Associate) *Expired* * HCNA(Huawei Certified Network Associate) *Expired* Despite expired certificates, the concept and basic knowledge is still very strong Debug - Logs - Resources Utilization Monitoring - Fix - Monitoring - Solved cheers, Henry Kusdaryanto
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    Debian
    Linux System Administration
    DevOps
    Desktop Support
    Web Server
    Network Administration
    Web Hosting
    Domain Migration
    Mail Server Implementation
    cPanel
    Web Host Manager
    Amazon Web Services
    DNS
    Google Cloud Platform
    CentOS
  • $150 hourly

    • 5.0/5
    • (250 jobs)
    A Top-Rated, Expert-Vetted VoIP/Software engineer with over 20 years of experience. My experience ranges from Asterisk/FreePBX phone systems, SMS messaging, Linux operating systems, to network administration. I believe you deserve a more professional, reliable, and personalized business experience, and I bring that mindset to every project. Whether I’m developing top-secret code for Lockheed Martin, or AI telephone agents for Nomo, or creating privacy-first communications for Mecca Hosting, Inc, or designing secure, high availability Asterisk systems for TeleConnx Inc., or handling difficult troubleshooting tasks, I always commit myself to the same standard: creative, client-first solutions and efficient, high-quality work, completed in a fraction of the time. I have a passion for transforming mundane phone interactions into exciting customer experiences, and I lean on decades of experience to create solutions that others would find impossible. In short, I can make your telephone system do pretty much anything, including turning on your coffee maker in the morning. I look forward to working with you!
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    FreePBX
    MySQL
    Kamailio
    Linux System Administration
    Amazon Web Services
    VoIP Administration
    Asterisk
    API Development
    C
    VoIP Software
    LAMP Administration
    Session Initiation Protocol
    Linux
    VoIP
    Business with 10-99 Employees
  • $30 hourly

    • 5.0/5
    • (277 jobs)
    ✅ 250+ projects ✅ Real, genuine speed optimization ✅ Improve Web Vitals ✅ No layout or functionality breaks ✅ Increase your conversion rate, google search rank, traffic, and profit ____________________________________________________________________________________________ Is your website suffering from slow load speeds? Did you know that slow loading speed affects not only user experience but also the search engine positions? I'm ready to optimize your website speed and take it to a new level. I usually do the following to achieve proper loading and response times: ✅ Browser Cache Configuration ✅ Server Cache Configuration ✅ Cache Preloading Configuration ✅ CDN Setup and Configuration ✅ Minifying JS/CSS/HTML files ✅ GZIP File Compression ✅ Lazy Loading Implementation ✅ Image Size Optimization ✅ Image Webp format conversion (Optional) ✅ Woocommerce optimization ✅ Database Cleanup and optimization ✅ 404 Checks & Fix (All) ✅ Disable Heartbeat (Optional) ✅ Deferring Unused JS/CSS ✅ Inline & Combine JS/CSS ✅ PHP Version Update (Optional, VPS or Dedicated servers only) ✅ Blocking Harmful Crawlers ✅ Font Optimization ✅ Image Hotlink Protection (Optional) ✅ Hosting Migration (Optional) Let me take a look at your website, and I'll show you how I can improve it. I'm fluent in English and almost always available online via email and messengers. Thank you for your time, Serge
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    cPanel
    Usability Testing
    WordPress Malware Removal
    Performance Optimization
    WordPress SEO Plugin
    Page Speed Optimization
    W3 Total Cache
    CSS 3
    WP Rocket
    WordPress
    WordPress Plugin
    WooCommerce
  • $85 hourly

    • 5.0/5
    • (37 jobs)
    Expert Systems Engineer and Cloud Administrator with 15+ years experience as an IT professional. I have a BS in Computer Science. I have supported over 100 networks, ranging from small business to fortune 500 companies. I have a wide range of skills and I understand most all concepts in the computing world. I will resolve your issue in a timely and professional manner.
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    VMware Administration
    Computer Skills
    Microsoft Outlook
    Customer Service
    Windows 7 Administration
    Network Security
    Microsoft Active Directory
    Windows Server
    Microsoft Azure
    Microsoft Exchange Server
  • $25 hourly

    • 5.0/5
    • (15 jobs)
    Highly experienced System and IT Administrator with around 13 years of experience in MSP environments. Previous technical duties have included all the aspects of company needs with IT support, administration, and documentation. Superior background in troubleshooting and documentation. Systems • 2003 server, • 2008 and 2008 R2 server, • Windows 2012 server and 2012 R2 • Windows 2016 Server • Windows 2019 Server • Windows 7 • Windows 8 & 8.1 • Windows 10 • Windows 11 • Kali Linux Tools • Perfmon • Procmon, • Process Explorer • Wireshark • Netmon 3.4 • PerfView • Active Directory • DNS • DHCP • Network Policy Server • Hyper-V • DPM RMM Solutions: • Continuum RMM solution • ConnectWise Automate • IT Glue • ITBoost • ConnectWise Automate • Datto RMM • Comodo ITarian O365: • Office 365 Administration • Office 365 Migration • Office 365 Migration using SkyKick 7 Bit titan • POP3/IMAP migration to O365 Office 365 Backups / O365 Backups • Office 365 backups using Skykick • Office 365 backups using Cloud Finder • Office 365 backups using Backupify Security & AntiVirus • WebRoot • Sentinel One • Symantec Endpoint Protection Cloud • Symantec Endpoint Protection - Small Business Edition • BitDefender Gravity Zone • Symantec Mail Security for Microsoft Exchange • Nessus Pro Vulnerability assessment • NMAP • Ethical Hacking • Pen testing • Penetration Testing • Firewalls • Crowdstrike • Avanan • Infocyte • Cylance • SumoLogic - SIEM • SumoLogic - SIEM Ticketing Tools • Service Now • HP Open view • TargetProcess • AutoTask • ConnectWise Manage Backup Products: • StorageCraft : Shadow Protect & Image Manager • Datto Continuity (Certified Technical Specialist I) • VEEAM Backups Firewalls • Fortigate 30F, 60F, 100F, Sonicwall TZseries
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    Office 365
    Windows Server
    Network Penetration Testing
    Vulnerability Assessment
    Ethical Hacking
    Web App Penetration Testing
    Kali Linux
    Penetration Testing
    Technical Support
  • $20 hourly

    • 4.9/5
    • (404 jobs)
    I am RHCE & RHCSS certified professional with over 5 years of System and Database Administration experience including experience in the areas of different Linux Distribution like Redhat, Suse-Linux, CentOS, Ubuntu, Debian, Window Server and database like MySQL, Oracle etc. I am very hardworking, dedicated and honest person and always give my 100%.
    vsuc_fltilesrefresh_TrophyIcon Zimbra Administration
    SSH
    Windows Administration
    WordPress Malware Removal
    Web Hosting
    SSL Certificate
    Email Support
    Website Migration
    Proxmox VE
    Amazon EC2
    Domain Migration
    Linux System Administration
    LAMP Administration
    cPanel
    Plesk
    Amazon Web Services
    CentOS
    Ubuntu
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