Filtering domains with pix and DNS

[sals]

Hi I have a Pix 506, I am looking to block AIM and the other services like it. Since the services load balance I cannot just enter an IP address. I would like to block the services using there domain names. Is the possible? If so can you give me some suggestions?

thanks.

[raymong]

There is nothing on the PIX that I know of that will allow you to filter services like AIM by domain name. On the PIX, you will have to filter based on ip or port number.

Here's a link that I came across that documents ways to block chat programs:

http://nscsysop.hypermart.net/no_chat.html