FreeBSD, Linux, VmWare administrator | DevOps
With 20+ years in system administration and infrastructure engineering, I focus on building reliable systems and enjoy digging into complex issues — performance tuning, disaster recovery, finding root causes, and solving problems that aren't always straightforward.
I work with both legacy systems and modern environments — from bare metal servers to virtualized and containerized setups.
🚀 Key areas I work with:
• Infrastructure setup and migrations (bare metal ↔ VM ↔ cloud)
• Troubleshooting and performance tuning (high CPU/load, slow systems, bottlenecks)
• Email deliverability (SPF, DKIM, DMARC, spam issues, mail server reputation)
• Virtualization and containerization (VMware, Proxmox, KVM, Docker)
• Networking and VPN solutions
• Disaster recovery, backup strategies, malware cleaning, and finding the point of intrusion.
🛠 Legacy Systems & Industrial Equipment Support
• Migration and virtualization of legacy systems (DOS, Windows 3.x/9x/NT/2000)
• Running outdated software on modern hardware via virtualization
• Recovery systems from old working HDD to VM, if native hardware fails. Including industrial PC's.
🔧 Core Expertise
• OS: FreeBSD, Linux (CentOS, AlmaLinux, Rocky, RHEL, Ubuntu, Debian, Gentoo), Windows, Windows Server
• Virtualization: VMware vSphere, ESXi, Proxmox, KVM, oVirt, VMware Workstation, Virtualbox
• Containers & Automation: Docker, Docker Compose, Jenkins, Ansible
🌐 Infrastructure
• Web: Nginx, Apache, LiteSpeed, Tomcat, Lighttpd, Caddy
• Databases: MySQL, MariaDB, PostgreSQL, MongoDB
• Mail systems: Postfix, Dovecot, Courier Cyrus, Rspamd, Postgrey, PostfixAdmin, SquirrelMail, Roundcube, SPF, DKIM, DMARC, MTA-STS, AWS SES, Mailgun, Sendy
• Control panels: WHM/cPanel, VestaCP, Virtualmin, Cyberpanel, and so on
🔐 Networking & VPN
• WireGuard, AmneziaWG, OpenVPN, StrongSwan, tinc, mpd5
• BGP (quagga), Squid (including LDAP and Kerberos auth), DNS (BIND), DHCP, TFTP
• Fail2ban, iptables, ipfw, pf, csf
💾 Storage & Backup
• TrueNAS Core/Scale, FreeNAS, SAN (iSCSI), AWS S3, Backblaze, Wasabi
• Veeam Backup & Replication, XSI Backup, rsync, rsnapshot, rclone
⚙️ Other
• Samba3+LDAP, Samba4 (NT4 and AD domains analog, LDAP, domains up to 500 users, GPO, roaming profiles)
• Monitoring: Zabbix, Prometheus, Grafana
• Services: Memcache, Redis, OpenLDAP, NFS, SVN, Git, GitLab (self-hosted), FTP, SFTP
• Platforms: Moodle, Nextcloud, OnlyOffice, BigBlueButton, DAViCal, WordPress, Magento
• Remote management: AnyDesk, TeamViewer, Radmin, Ammyy Admin, RustDesk, MeshCentral
• Hardware: Dell, HP, Supermicro servers, Dell PowerVault storages
• Networking equipment: HP, Dell, 3Com switches
• Embedded/firmware: DD-WRT (including software cross-compiling for ARM)
• Scripting: Shell scripting, Python, PHP
Have an interesting or unusual problem? That's exactly what I enjoy — feel free to reach out.
I value long-term collaboration and quality over quick fixes.
Work Terms
We can discuss all of these as we start work.