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Name Description application based personal firewall
Firestarter GTK program for managing and observing your firewall
OpenVPN Admin Graphical configuration tool for OpenVPN
Nikto web server security scanner
nmap The Network Mapper
Guarddog Firewall firewall configuration utility for KDE
Netdisco Network management and discovery tool
OpenVPN virtual private network daemon
IPCop Linux firewall distribution
vpnc Cisco-compatible VPN client
KVpnc vpn clients frontend for KDE4
secvpn Secure Virtual Private Network
Wireshark network traffic analyzer - GTK+ version
Panda DesktopSecure Panda DesktopSecure for Linux.
Firewall Builder Firewall administration tool GUI
Scalp log analyzer for the Apache web server that aims to look for security problems
FTester Firewall Tester
gnoMint x509 Certification Authority management tool for GNOME
Nessus Remote network security auditor, the client
PSAD Port Scan Attack Detector
Umit network tool and graphical frontend for nmap
Snort flexible Network Intrusion Detection System
nmap Front End The Network Mapper Front End
PacketFence Free and Open Source network access control (NAC) system
Kleopatra certificate Manager