Content filtering- webmail

[reachb4]

Hi,
Is it possible to filter the content of a webmail( such as yahoo,gmail) by tweaking the TCP/IP stack of the OS?

I also need to monitor the content of the IM(yahoo Messenger,Gtalk) etc. I


Please advice.

Thanks in advance.


Regards,
John.

[henky@nok.co.id]

Why not. But it is not so easy.
You can sniff all incoming/outgoing packets over your network interface.
Notice: If the packet is using SSL, it's very difficult to check contents of packet.

[reachb4]

Please tell me what are the technologies available for packet filtering?

[henky@nok.co.id]

Please tell me what are the technologies available for packet filtering?
Find it in open source of NetFilter (http://www.netfilter.org/). But
this is for Linux. If you just want to see the packet TCP dump (http://www.tcpdump.org/) is one of choice.

Henky