How to log established sessions only?

Can anyone tell me how to log established sessions only?
For example user has connected to some host and router writes only one line to log : that this user has connected somewhere.
Please help me…

Use the option log under firewall


Regards


José Ignacio Acosta
Cibernet Comunicaciones / Mikronet
Joaquín V. González
Salta - Argentina
http://www.mikronet.com.ar
http://www.cibernetcom.com.ar