vxSniffer - Network Monitoring and Analysis Software.
vxSniffer is a complete network monitoring tool for Windows CE-based devices.

Features include:
-User defined filtering capability.
Monitor only the information you need
Filter by source/destination IP address, MAC, TCP port or UDP port.
-View summary and detail packet data.
-Various font sizes for easy viewing.
-Save trace packets for later analysis.
Text file format which can be viewed locally or on the desktop PC.
Ethereal / Libpcap / Tcpdump format for use by specialized desktop software.
-View data while capturing packets.
No need to stop sniffing while examining detail data.
Prevents loss of critical packets
-IPv6 support
-Operates on all Handheld 2000 HPCs, Pocket PC, Pocket PC 2002 and Windows Mobile 2003 / 5.0 / 6.
-Windows CE 3.0 or later required.
-Requires an Ethernet or Wi-Fi adapter with a NDIS compatible driver. you can free download vxSniffer 2.0.1 now.