Windows server 2008 NAT and Proxy bypass

[rusulu...@gmail.com]

I have problems with a proxy auth over a shared network.

Config:

1 server with 2 NICs and windows server 2008 r2

NIC_1 = 10.xx.xx.xx

AD

Internet connection

Proxy with AD auth

NIC_2 = 172.xx.xx.xx

Internal network

it will be used for connecting android devices

Request:

i need to interconnect the 2 networks

i need to share internet from 10.xx to 172.xx

What i've did so far:

NAT on server (Virtual router)

Local DNS server

defined route 0.0.0.0 on my 172.xx network router.

What's working:

everything ... except that i cannot skip the proxy

if i set proxy on browser, i cannot access any internal webpage but i have internet

if i don't set proxy, i can access local webpages but i have no internet

Question?:

how can i tell my server to use it's own "name" for proxy auth, and to give me "clean" internet, without authentication?

or .. how can i set "use this global proxy for all internet requests" ?

Remark:

i have full rights on the server, and i can change even the NAT or .. whatever it's necessary to make this work.

Please help me.... thank you