Strong experiences with Network Security and Unix Security. - network infrastructure design - on logical (networking) level - firewalls Checkpoint - CCSE product instalation , admininistration of security policy - IPtables administration - Cisco devices basics - Solaris, Linux - installation, administration, hardening, scripting - Linux kernel customization - Windows 2008 server administration (basics) - opensource networking software instalation (also compilation and porting to Solaris), administration postfix, sendmail, qmail, squid, apache, nginx, ...