IT specialist (15j)
Linux:
• Red Hat, Debian, BSD
• Postfix, Samba, Apache, PHP, MySQL, Bind, etc.
• IPsec, OpenVPN, iptables, pfSense, Snort
• TCP/IP, SMTP, FTP, etc.
• Xen/Citrix, KVM
Windows:
• Active directory
• Group Policies
• Exchange, Office 365
• VmWare, Hyper-V,