Mr.Sysadmin

pfSense, OpenVPN, Wi-Fi, SMB, and network resources. Microsoft 365: Exchange Online, Outlook, corporate email, Entra ID, SPF, DKIM, DMARC, and email delivery troubleshooting. Databases and Business Systems: PostgreSQL, 1C server, thin clients, installation, updates, and troubleshooting. Information Security: Dr.Web Enterprise, firewalls, log analysis, investigating suspicious activity, and access recovery. Backup: Backup strategy implementation, data recovery, and disk/file system management. Hardware: PC and laptop diagnostics and repair (SSD/HDD, BIOS/UEFI), as well as network and office equipment maintenance. Automation: PowerShell, Bash, administrative scripting, and monitoring of processes, network connections, and servers. Specialization: Complex troubleshooting, IT system recovery, user support, and ensuring the stable operation of corporate infrastructure.