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Block Yahoo Messenger

I'm planning to block yahoo messenger only on some users not the entire network?

I tried closing port 5050 on the packet filter but Y! messenger seems to be using smpt port to connect. This port i cant block because we are using this for email.

Oh by the way we are using ASG120 v6.305

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0 ollie_01 over 18 years ago

i also tried to drop connection on IPS but still everyone can connect to y! messenger
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0 Griff over 18 years ago in reply to ollie_01

Ollie,

How do you have the SMTP traffic passing through your firewall? Are you using the SMTP proxy or a rule set? How do you have the permissions set for what can access the SMTP proxy or firewall rule set?

Griff
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0 ollie_01 over 18 years ago in reply to Griff

i allowed SMTP through packet filters on the firewall
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0 Datsys over 18 years ago in reply to ollie_01

Hi,
I have also noticed similar activity with Windows Live Messenger. We have blocked everything for MSN and all of the other clients except Skype, however I am still seeing a few worskstations where the users are able to use Windows Live Messenger. Any ideas why and how we can shut that down?
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0 William Warren over 18 years ago in reply to Datsys

all of the im's and p2p now default to port 80 if they are blocked. IPS isn't going to block these easily anymore. A strongly worded and enforced policy is your best bet IMO.
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0 Datsys over 18 years ago

Could this be the same reason why I am having difficulty blocking access to Hotmail, Yahoo mail and some of the other Yahoo sites (video, music,etc.)? Or is it that I am not using the right URL in the Content Filter?
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0 BrucekConvergent over 18 years ago in reply to Datsys

The easy way to do this:

Create packet filter rules that allow / deny access to the Yahoo messenger server sites listed here: http://help.yahoo.com/l/us/yahoo/messenger/messenger75/messenger/messenger-02.html

You would have to use DNS hostname definitions for the server names, and I would recommend checking back with Yahoo occasionally to see if they've added more servers, etc.

I've used a similar technique in the past dealing with AIM (before IPS was available) issues.
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