? Linux/Unix/Microsoft RHEL/Centos, Debian, Gentoo, Win2008/2012 O/ ? MS Exchange, MS SQL , IIS, MySQL, Apache, NGINX, NFS, ProFTPD, SSH/SCP, Postfix, Bind ? Network storage system configuration NetApp®, EMC ? Virtaul machine configuration VMWare, HyperV, ? Data and network security system Firewall / NAT, VPN, IDS, Radius, F5, Check Point, ASA, IPTABLES, IPFW, routing protocols ISIS, OSPF, BGP. ? Bash, Python, Perl. ? Protocol Analyzer Wireshark, Ixia Chariot ? Network Management System SNMP,HP OPENVIEW, CiscoWorks, Zabbix, Cacti, Nagios ? OSS/BSS