Re: [squid-users] How to block ultrasurf/thor using transparent proxy?

Ultrasurf can be blocked by ufdbGuard, a free URL rewriter for Squid.

ufdbGuard uses various techniques to block Ultrasurf:
- verifying the HTTPS connections by opening a new HTTPS connection
   and check if the other side speaks SSL+HTTP
- blocking HTTPS to sites without a FQDN in the URL
- blocking HTTPS to sites without a properly singed SSL certificate

Marcus

Amos Jeffries wrote:
> Gerson "fserve" Barreiros wrote:
>> How to block ultrasurf, thor and similars using squind in transparent
>> mode?
>
> Haven't heard of Thor. What does it do? references please.
>
> UltraSurf - you can't. Its an HTTP-over-P2P proxy. Blocking requires
> control of the web browser being used. At which point you are better off
> dropping the transparent proxy, set the proxy settings properly and lock
> them.
>
> Amos
Received on Tue Nov 24 2009 - 11:57:30 MST