[squid-users] Skype block

[Riccardo Castellani]

I'm reading about method to block users for using Skype, can you confirm 
unique way is to deny access directly to all IP address when method 
'connect' (SSL) is used ?
In this way people cannot access directly to specific site using IP instead 
FQDN !
Can I restrict Skype access in another way to avoid this behaviour ?