I have a PIX515 and I am trying to block MSN but all attempts failed. I use ethereal captured packets and block each possible destination nets. Later I found MSN tried to use 207.46.*.* port 80, but this IPs also use for windows auto-update, for sure I can not block it since I need update my windows. If MSN works like this, does that mean I can not block it??? It not make sense?
Any idea to block MSN ?
I think that if you need any Micro$oft service connectivity, you're obligated to all of them.
Not sure if the 515 can block domains, you might want to look into blocking *.msn.com
On an IOS firewall feature set you can enable the HTTP inspection and specifically limit access to certain domain names with the urlfilter exclusive deny msn.com command. The PIX relies fully on a URL filter server such as Websense. I'd setup the external router to do CBAC and enable the http inspection within CBAC.
I also use Fortinet block
Looks like MSN use all these domain. so far so good, can block MSN and online-msn.
Check this link and try out their suggestions.
I think for MSN they say it uses MSNP (Microsoft) 1863
Do rate if this helps :)
Upgrade you PIX to the latest 7.x series and you can use the URL filtering feature of the IOS to block the URL's that you dont want to permit for the users. It has more enhanced granular traffic filtering built into it.
HTH,Please rate if it does.