 block instant messenging
i want to block any clients accessing web instant messenging. how do i do this? lets take aimexpress.aol.com they have over 100 servers. i don't know how to search and find every single server ip that they have dedicated to their web messenger. and then there is google, yahoo, msn..ect. on my previous fw we were able to block not just ip address like checkpoint but also web addresses. how can i block the webaddress as opposed to entering in over 1000 server ip addresses? |