Zx Sniffer

Zx Sniffer is a freeware packet sniffer for Microsoft Windows used for network troubleshooting and analysis.

Zx Sniffer's main function is to passively collect packets sent across a computer network by putting the network card into promiscuous mode. It's also capable of decoding plaintext passwords from packets, unlike the low-level packet sniffer tcpdump. Later releases included a basic packet capture utility making it also a protocol analyzer, such as Wireshark.

Zx Sniffer is no longer maintained and its website is currently down.

Features

• Graphical user interface
• Supports packet sniffing and capture of: TCP, UDP, ICMP and IGMP protocols.
• Data can be captured "off the wire" from a live network connection and saved to either a .txt or .html format.
• Password decoding including: POP, FTP, ICQ, and HTTP.
• Data display can be refined using a display filter.
• Includes a Whois, Host Lookup, and Port Lookup tool, which resolves a port to a protocol.