how can i prevent messenger communications

Answered Question
Oct 19th, 2009

dear experts, i'm using ASA 5520 and i want to deny the msn and yahoo messengers without affecting the hotmail or yahoo websites access, so i want to know the specific ports which i should deny and on which transport layer protocols (tcp or udp), i appreciate ur urgent answer because this is very important for me in my security work, thanks alot

I have this problem too.
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Correct Answer by kicharle about 7 years 1 month ago

Hi

I think, you can get the list of port numbers from google.

But you can try the following:

class-map type inspect im match-any yahooandmsn

match protocol msn-im

match protocol yahoo-im

policy-map type inspect im yahoomsn

parameters

class yahooandmsn

reset

With regards

Kings

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Correct Answer
kicharle Mon, 10/19/2009 - 02:44

Hi

I think, you can get the list of port numbers from google.

But you can try the following:

class-map type inspect im match-any yahooandmsn

match protocol msn-im

match protocol yahoo-im

policy-map type inspect im yahoomsn

parameters

class yahooandmsn

reset

With regards

Kings

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