useful UNIX/UBUNTU tools

WinSCP is an open source SFTP client and FTP client for Windows. Its main function is the secure file transfer between a local and a remote computer. Beyond this, WinSCP offers basic file manager functionality. It uses Secure Shell (SSH) and supports, in addition to Secure FTP, also legacy SCP protocol

WinScp

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iptables - the name of the user space tool by which administrators create rules for the packet filtering and NAT modules.

tethereal - Dump and analyze network traffic

hping- command-line oriented TCP/IP packet assembler/analyzer.

Snort - open source network intrusion detection and prevention system capable of performing packet logging and real-time traffic analysis, on IP networks.

Nessus - comprehensive vulnerability scanning program. Its goal is to detect potential or confirmed weaknesses on the tested machines.

tripwire - passive triggering mechanism

Nmap ("Network Mapper") - free and open source (license) utility for network exploration or security auditing