Establish rule

[asamra]

can you help me with understanding what are the tcp packet flags that the Cisco ios router consider as establish rule ?

there are 6 flags you can add to access list definition - fin syn ack rst psh urg. which combination indicate an establish connection ?

is it enough to add the ack to the rule for the router to treat it as an established ?

[Richard Burts]

There are two flags that Cisco IOS considers for the TCP established rule. If the ACK or the RST flags are turned on the IOS will consider them as established. None of the other TCP flags affect this.

HTH

Rick