Error Code 407 Proxy Authentication required

Hi everyone,

i am using Tmg 2010 in my network and also using Fortinet firewall.

i facing problem since last month the Tmg deny firewall to access internet. the Tmg asking authentication to allow access internet

already set user name and password to firewall(done by fortigate team support)but still facing problem.

i hope one help me to avoid this problem.

thanks in advance