analyse tcpdump output

Hi, I wonder if someone knows a tool to use a tcpdump output for anomaly dedection. It is sometimes really time consuming when looking for identical patterns in the tcpdump output. It would be helpful to get a diff between SYN and ACK's e.g. Or look for a pattern in a URL. Or just get some timediffs e.g. when an ACK is send but client is waiting for data etc. We would like to decrease time to investigate the cause for an unusual network behaviour. Best Stefan -- Stefan Hegger Internet System Engineer Stefan.Hegger@lycos-europe.com Tel: +49 5241 8071 334 Lycos Europe GmbH Carl-Bertelsmann Str. 29 Postfach 315 33311 Gütersloh