Skills: - Linux,Unix: RedHat, Debian, Ubuntu, CentOS, FreeBSD - Firewalls/IDS: Iptables , Snort , Modsecurity, Fail2ban, Full Packet Capture IDS, Windows Firewall, Citrix NetScaler, Cisco IOS - Web Server: Apache, IIS - Network Tools: Nmap, Netcat , WireShark , Tcpdump , Nessus, Bind, etc. - Mail Server: Postfix , Sendmail, OWA - Databases: MySQL, SQL server, Oracle - VPN : OpenVPN , PPTP, L2TP, IPSec - Programming Languages: Python - Virtualization: VMware , VirtualBox, AWS, KVM, OpenVZ, OpenStack