Linux server and VPS administration - setup, security, support

What I do:

- Web stacks: Apache+PHP, Nginx+PHP-FPM.

- Databases: MySQL, MariaDB (installation and optimization).

- Fine-tuning and optimizing the OS: Ubuntu, Debian, CentOS, etc.

- VPN: OpenVPN, Double-OpenVPN, OpenVPN+stunnel, WireGuard, etc.

- IPv4/IPv6 proxy settings with and without auto-rotation.

- Installation of trackers and related software.

- Nodes/blockchain: Aptos, StarkNet, Humanode, Kyve, Massa, etc.

- Panels: Fastpanel, VestaCP, ISPmanager, VMmanager, Plesk, cPanel/WHM, BrainyCP, etc.

- Site and CMS migration.

- Firewall: iptables/ufw (bot protection, filters).

- Mail infrastructure: Postfix + Dovecot + Roundcube.

- DNS: BIND, NSD.

- Proxy servers: Squid, 3proxy.

- Jabber/XMPP on ejabberd.

- Video streaming: RTMP, HLS.

- Optimization of VPS/VDS/dedicated servers for high loads.

- Virtualization systems: VMware, XEN, ProxMox.

- Monitoring systems: Nagios, Zabbix, etc.

Permanent administration:

Subscription support: tuning, updates, backups, monitoring.

Small web jobs: CMS installation, layout edits.