udp

IPTraf is a console-based network statistics utility for Linux. It gathers a variety of figures such as TCP connection packet and byte counts, interface statistics and activity indicators, TCP/UDP traffic breakdowns, and LAN station packet and byte counts. IPTraf is an IP traffic monitor that shows information on the IP traffic passing over your network.

Qps Visual Process Manager is an X11 version of “top” or “ps” that displays processes in a window and lets you sort and manipulate them. It displays some general system information, and many details about current processes (such as the TCP/UDP sockets in use by a process). Qps runs on Linux and Solaris.