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New Member

Blocking IM ports

Some advice on blocking instant messenger ports would be very helpful. I believe that a deny on 1863 tcp and udp will handle MSN. Am I coreect on that and what other ports need attention for such as AOL IM?

thanks

4 REPLIES
Cisco Employee

Re: Blocking IM ports

This has been asked numerous times on this forum before, so checking some old posts will assist you.

In addittion, http://testweb.oofle.com/messaging/index.htm has some good information about blocking IM's and file sharing programs.

New Member

Re: Blocking IM ports

thank you for this. I shall look at the older posts also.

Ellis

New Member

Re: Blocking IM ports

Here are a few IPs that are known to belong to login.oscar.aol.com:

AOLim_1 = 152.163.214.75

AOLim_2 = 152.163.214.76

AOLim_3 = 152.163.214.108

AOLim_4 = 152.163.214.109

AOLim_5 = 205.188.1.56

AOLim_6 = 205.188.4.106

AOLim_7 = 205.188.147.114

AOLim_8 = 152.163.241.121

AOLim_9 = 152.163.241.129

AOLim_10 = 152.163.242.28

AOLim_11 = 152.163.242.24

AOLim_12 = 152.163.241.120

AOLim_13 = 152.163.241.128

AOLim_14 = 152.163.241.96

AOLim_15 = 64.12.161.153

AOLim_16 = 64.12.161.185

New Member

Re: Blocking IM ports

Hi.

You´re right it´s been asked a lot of times in the past but, many of them doesn´t work cause these messenger are moving constantly. That´s why we try to keep update to this information, so if you have new information on it we will appreciatte it.

By the way the link that you put (http://testweb.oofle.com/filesharing/index.htm), it has past information on blocking this services.

thx.

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