Hire the Best Zabbix Specialists
in Sri Lanka

Zabbix is my primary specialty. I design, migrate, rescue, scale, and maintain Zabbix monitoring environments for MSPs, ISPs/WISPs, hosting providers, and infrastructure teams. My experience includes an 80+ tenant MSP environment maintained for nearly six years and an ISP/WISP Zabbix platform that has grown beyond 2,000 hosts. I work on both new deployments and difficult existing environments, from migrations and distributed proxy architecture to custom monitoring, alert engineering, performance troubleshooting, database optimization, dashboards, integrations, and long-term platform support. Zabbix expertise Migration to Zabbix from PRTG, LibreNMS, Icinga, and other monitoring platforms Distributed Zabbix Server / Proxy architecture, active proxies, PSK encryption, and HA SNMP, Agent/Agent 2, HTTP, API, and custom-script monitoring Advanced LLD, preprocessing, dependent/calculated items, and custom template development Monitoring devices where vendor templates or documented SNMP OIDs are unavailable Alert tuning, dependencies, recovery logic, escalation, and SLA/service-based monitoring Zabbix performance troubleshooting, server/proxy tuning, PostgreSQL optimization, retention, and partitioning Grafana integration, Zabbix Maps, SLA/availability reporting, and customer-facing dashboards Integrations including ConnectWise, PagerDuty, Microsoft Teams, email, and Microsoft Entra ID Upgrades, maintenance, capacity planning, documentation, team training, and L3/escalation support Experience at scale For an MSP serving 80+ tenants, I designed and maintained a Zabbix environment covering 523 hosts and 29,000+ items, with up to 23 distributed proxies. My work included monitoring-platform migrations, tenant-specific templates and policies, Grafana dashboards, ticketing integration, reporting, access control, training, and ongoing escalation support. For a large ISP/WISP, I took over a Zabbix environment that had become barely operational because of excessive discovery, items, and triggers. After redesigning templates and LLD, tuning the platform, improving trigger policies, and addressing database scalability, the system became operational again and has since grown from around 850 to more than 2,000 hosts, primarily MikroTik and Ubiquiti infrastructure, radios, and CPEs. My ISP/WISP work also includes wireless and network-specific monitoring such as BGP peers, link and backhaul utilization, latency and packet quality, signal/RSSI metrics, sector health, topology-aware dependencies, and logical service availability. More than standard templates When standard monitoring is not enough, I build what is required using SNMP, APIs, scripts, application data, and custom Zabbix logic. This includes reverse-engineering undocumented SNMP data, collecting metrics through vendor cloud APIs, creating application-level service checks, and designing monitoring around real infrastructure relationships rather than simply generating alerts for every device state. Wazuh SIEM / Security Monitoring I also deploy and operate Wazuh SIEM/XDR for servers, firewalls, infrastructure, and application monitoring. My hands-on work includes custom Wazuh decoders and rules, File Integrity Monitoring, Security Configuration Assessment / CIS-aligned checks, vulnerability detection and remediation, authentication/firewall/server/application-log monitoring, alert investigation, threat hunting, and security hardening based on observed events. I treat security monitoring as a continuous process: Detect → Investigate → Remediate → Validate Infrastructure knowledge behind the monitoring My monitoring work is backed by 20+ years of network and systems experience, including BGP/MP-BGP, OSPF, MPLS, routing and switching, firewalls, Windows/Linux, VMware/Proxmox, Active Directory, DNS, Azure, and Microsoft 365. That background helps me understand what the monitored infrastructure is actually doing — topology, redundancy, dependencies, capacity, and service impact — rather than treating Zabbix as an isolated tool. How I can help I can handle a focused project such as a Zabbix migration, deployment, health check, performance problem, custom template, integration, or Wazuh implementation, or remain involved as your long-term Zabbix/Wazuh escalation and platform specialist while your internal team handles routine operations. If your monitoring environment is overloaded, noisy, difficult to maintain, missing important visibility, or needs to scale, I can assess where the problems are and help turn it into an operationally useful monitoring platform.

Hi, I’m Udantha 👋 — a Systems Engineer & DevOps/Hosting Specialist with 7+ years of hands-on experience in: Linux system administration WordPress troubleshooting Docker deployments CloudPanel / Plesk / cPanel hosting Server migrations & backup recovery Virtualization & Cloud Operations DNS, Email (DKIM/DMARC/SPF), SSL, and security hardening MySQL/MariaDB performance tuning Website performance optimization Cloud deployments on AWS / DigitalOcean / Linode I specialize in fixing broken systems, optimizing slow servers, and performing clean, zero-downtime migrations—the kind of work where precision matters. Clients hire me for tasks that need someone who can quickly diagnose, clean up, and stabilize complex environments: 🛠 I Can Help You With: Server security hardening & performance tuning Database fixes, recovery, and replication Cloud server setup (Ubuntu, Debian, Rocky, Alma) Fixing DNS, email deliverability & hosting issues Restoring crashed websites (Digital Ocean, AWS, Google, IONOS, Bluehost, SiteWorx, etc.) WordPress errors, migrations, malware cleanup Web servers such as Nginx / Apache SSL configurations Docker Configurations Backup strategy design (Acronis, B2, rsync, S3, Plesk backup) ⚡ Why Clients Like Working With Me I solve problems fast I provide clean documentation after every job I communicate clearly and don’t overpromise I’ve rescued dozens of servers & websites from disaster If you're looking for someone reliable who can stabilize your servers, fix urgent issues, or manage complex migrations with zero drama — I’m available and ready to help. Let’s get your systems running smoothly again. 🚀

Windows Server & Microsoft 365 Administrator | Active Directory | Exchange I help businesses fix, migrate, and manage Windows and Microsoft 365 environments—including Active Directory, Exchange, Windows Server, Microsoft 365, and production infrastructure. For the past 4 years, I've been the infrastructure consultant supporting Revalize LLC (USA) and its customer-facing production environments—handling deployments, upgrades, infrastructure changes, troubleshooting, and production support across multiple customer organizations. I've also completed infrastructure migration, remediation, and systems administration projects for 20+ organizations across SaaS, manufacturing, and professional services. What I can help you with Microsoft 365 & Exchange: Microsoft 365 administration · Exchange Online & Exchange Server · Exchange → Microsoft 365 migrations · Hybrid & tenant-to-tenant migrations · Entra ID (Azure AD) · Teams & SharePoint administration · MFA & Conditional Access · SPF/DKIM/DMARC · mailbox and email troubleshooting Windows Server & Active Directory: Windows Server administration · Active Directory · Domain Controller deployment and recovery · AD replication & DNS · SYSVOL/DFSR troubleshooting · Group Policy · FSMO roles · multi-site AD environments · Windows Server upgrades and migrations · PowerShell automation Infrastructure & Operations: production deployments and upgrades · infrastructure troubleshooting · disaster recovery planning · backup validation · change management · monitoring · VMware vSphere · Hyper-V Some of the problems I've solved: → Migrated 500+ users from Exchange 2016 to Microsoft 365 within a 72-hour cutover window, with no email loss → Restored Active Directory replication for 450+ users across 3 locations within 8 hours → Recovered a non-booting domain controller affected by SYSVOL/DFSR issues, preventing a wider authentication outage → Automated user onboarding with PowerShell, cutting provisioning time from approximately 2 hours to 10 minutes Additional experience: basic AWS infrastructure and EC2 cost review · Fortinet · pfSense · Veeam · Commvault · ServiceNow · Jira Certifications: MCSA: Windows Server 2016 · Microsoft 365 Certified: Fundamentals · Fortinet NSE 1 & 2 Need help with Windows Server, Active Directory, Microsoft 365, or Exchange? Send me what you're trying to accomplish, what's currently going wrong, and any relevant error messages or screenshots. I typically respond the same day. I can help with one-time troubleshooting, migrations, infrastructure remediation, production deployments, or ongoing systems administration support.

I help businesses migrate, manage, and troubleshoot VMware, Proxmox, AWS, Windows/Linux servers, and network infrastructure. With 15+ years of hands-on IT experience, 6,700+ Upwork hours, and 100% Job Success, I specialize in: - VMware vSphere, ESXi, vCenter, Horizon, and Dell server administration - DELL NetApp SAN Storage Adminstration - VMware to Proxmox migration planning and execution - AWS server setup, troubleshooting, backup, and optimization - Windows/Linux server management, SSL, DNS, VPN, firewall, and network design - Documentation, monitoring, backup, and disaster recovery planning Clients hire me when they need a reliable senior engineer who can investigate quickly, explain clearly, and fix production issues with minimal downtime. Certifications include VCAP-DCV, VCP-DCV, VCP-NV, AWS SAA, CCNP, CCNA, Microsoft, Dell VxRail Deploy, and Dell PowerStore Deploy.

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)

✅ Self-motivated Linux Server Administrator and Network Administrator with more than 10+ years of working experience with different Cloud providers. Ready to take up any challenge. ✅ Expert on, 💎 AWS, Google Cloud, Azure, DigitalOcean or onPrem server management. 💎 Setting up and manage different environment Web Server, Database Server, Mail Server, Load Balancer, Optimization and Security. 💎 Designing Web Server - Building web server based on Apache, Nginx, Nginx/php-fpm, Varnish as backend with high performance tuning and major security issues. 💎 Learning Management Systems – Moodle (Expert) including mobile app (Android & Apple IoS) customization 💎 Document Management Systems – Nextcloud (Expert) and onlyoffice 💎 Security - Malware removal, server hardening using firewall rules, restriction in server login, Web security, Security auditing, fail2ban, mod_security for web attack, mod_evasive DDOS attack prevention, Firewall setup CSF, UFW and iptables. Prevention from mail attack, SSL Certificate installation. 💎 Database Server - Building MySQL, Mariadb database server with high performance , troubleshoot database server problems, tweaking MySQL variables for performance. 💎 Scripting - Bash Scripting for monitoring servers, auto backup. 💎 Mail server- Building mail server for sending and receiving mails postfix, sendmail, setup mail client Roundcube, SquirrelMail, Rainloop, Horde. Dovecot for POP & IMAP, troubleshoot mail issues, configure mail for delivery in inbox. 💎 Monitoring services and servers – LibreNMS, Nagios monitoring tools, tweaking as per requirement, monitor servers using bash script, Tripwire. 💎 Amazon - AWS EC2 server setup, Security. 💎 Cloud Servers & Panel - Management of Ubuntu, Centos, Cpanel, CWP, WHM, Plesk, Webmin, Diretadmin, ISPConfig, JustHost, Godaddy, Linode, Rackspace, Amazon. 💎 Migration - Server migration, website migration, database server migration, mail server migration. 💎 VOIP Solutions - Asterix based PBX (Eg: VitalPBX) 💎 Video conferencing - Zoom (including on premise setup), Jitsi, BigBlueButton 💎 Virtualization Technology - VMware VSphere Esxi, KVM, Xen Server 💎 Networking (CCNP R&S and SP certified) - Hands on experience with CISCO, HP, Extreme, Juniper devices including wireless. 💎 Firewall configurations - Hands on experience with Palo Alto, Check point and Cisco ASA firepower. ✅ Please do not hesitate to contact me to discuss your project in detail and determine how my skills will positively contribute to your team.