OpenVPN, Squid and two networks. How to setup routing?

[telepups]

Hi,

i hope this is the right place to post this problem!

I have a server with two different jobs, the first job is openvpn, the second is to be a proxy.
The sever has two network interfaces with two different networks (internet connections).
The first network is the internal network. This network has a 2 mbit internet connection with static ip which should be used to access the openvpn server. The second network is only a 16 mbit internet connection without staitc ip, this network should be used to access the internet (using the squid proxy).

And now the problem:
If i set the default gateway to network one (internal with 2mbit internet), i can establish a vpn connection using the static ip. Now the squid will use the 2mbit internet connection to access the internet, but the squid should use the other network (16mbit) to access the internt. The 2 mbit connection should only be used for vpn connection.
If i set the default gateway to network two (16 mbit internet), the squid will use this connection to access the internet, but i can't establish a vpn connection using the static ip. I can establish a vpn connection if i use the dynamic ip of the 16 mbit connection.

I don't know how to setup the server to use the 2mbit connection for vpn and the 16mbit connection for squid.

Does anybody know a solution without using two different computers?

Best regards,
Benjamin Tietze

PS: I hope my english is understandable.

[telepups]

Really nobody who can help me?

[krzee]

this should be something to configure in squid. It is easily done in dante (a socks daemon that i have used)