Network hardware: Juniper (J4300/EX3300/SRX240h2[ipsec,CoS]), Cisco ASA 5500, Cisco(1841/CE500/29XX(S),35XX/3800/4503), Cisco WLC (4400/5500), HP ProCurve, D-link DES-3XXX, Cisco AP (C1131/C1142); Server hardware: Fujitsu {RX, DX, BX}, HP ProLiant DL(X), IBM; OS: Ubuntu server, Centos, FreeBSD, Windows(All); Virtualization: VMware ESXi (5.0/5.5); Protocols: ARP, TCP, UDP, IP, VLAN+Trunk, FTP, SSH, NTP, SMTP, SNMP/SNMPv3, SIP, WEP, WPA/WPA2, PPTP, OpenVPN,DNS, DHCP, HTTP(S); Web: Apache[install+configuration+support], nginx[install+configuration+support],IIS[basic]; DB: MySQL; User control systems: DansGuardian, SquidGuard, LanBilling, Radius; Monitoring systems: Nagios+nagvis, Zabbix; Firewals & IDS/IPS: iptables, pf, suricata + barnyard2, snort; Scripting languages: Bash[Advanced], Perl[Advanced], PHP[basic]; MSSoft: AD, Exchange Other: PoE, SFP/SFP+, BIND, TOR, I2P, QoS, ServerView;