How to block UltraSurk in squid -Resolved
Ultrasoft is one among the proxy bypass software which cannot be blocked since the IP address of the server changed frequently and also it encrypts the traffic through the secured pipe.
I think the only way to block it in the squid is to block IP based browsing in the squid proxy
TO achieve this you should add the below lines in the squid.conf file
vi /etc/squid/squid.conf
add the below lines in the top of all access lists
acl ipacl url_regex http://[0-9]*\.[0-9]*\.[0-9]*\.[0-9]*
http_access deny ipacl
acl numeric_IPs url_regex ^[0-9]+.[0-9]+.[0-9]+.[0-9]+
http_access deny numeric_IPs
after this Ultrasurf will not be able to connect to their server since it initiate IP based request for that
