AD, GPO, DNS, DHCP, DFS, NTP, VPN, FTP, TCP/IP, SMTP, NAT, VLAN, LDAP, PKI, Routage, Switching, HA (Fortinet, stormshield, arkoon, Cisco, 3Com) Vmware ESXi, Hyper-V, Docker Nagios, Shinken, Vigilo, SNMP, NRPE Veeam