You could set up SSL decryption/re-encryption for outbound traffic. That would block it I believe because UltraSurf uses specific certficates and won't accept the firewall's-CA-signed cert in place of certs signed by its trusted CA.
Other than that all you can do is block the range of IPs that UltraSurf uses. Google search for 'block ultrasurf' to find out those IPs and block them for port 443.
Choscar08, I also have the same problem. we are working MFE 8.3.1
I try create rule to block ultrasurf application. But not working.
Ce message a été modifié par: stonewall on 08/08/13 00:39:09 CDTCe message a été modifié par: stonewall on 08/08/13 00:40:06 CDT