Hi all, I have Isa Server in my LAN. I have tried to block MSN Messenger using Isa Server in all host of my LAN. So, have down the following: >From Isa Server, i have used a Protocol Rule, then right click and choosed new >Protocol Rule with the this parameters: name: msn action: deny protocols: selected protocols and choose msn messanger But, the results was that the clients went on using MSN Messanger. Any Idea, how can i get good results, i.e., blocking MSN Messanger using Isa Server? Best Regards Mario Videira