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Community Member

How to block yahoo messenger and msn messenger

Hi everybody hope u r doing find,

please I want to block user from using yahoo messenger and live messenger; for that I have an ASA 5510 like perimeter equipment, all internet trafic passing through this ASA; in the same time, I also want to block internet traffic what I did by blocking http and https traffic, but I thought that by blocking these two types of traffic, it will also block yahoo messenger and live messenger but it is not the case

I am looking forward to hearing you.

Thx

1 REPLY
Cisco Employee

Re: How to block yahoo messenger and msn messenger

Inspect IM supports MSN Messenger 7.0 (Build 7.0.0816), Yahoo Messenger 7.0.0.437.


The option was to use http inspection to drop msn packets using port 80.

We provided this config. for the customer and he confirmed that it works.

regex msn-messenger "^VER [1-9] MSNP[1-9]+.*\x0d\x0a.*MSNMSGR.*\x0d\x0a"
  class-map type inspect http match-all http-msn
   match request method post
   match request body regex msn-messenger
policy-map type inspect http http-msn
   class http-msn
     reset log
policy-map global_policy
    class inspection_default
     inspect http http-msn

I hope it helps.

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