access to the specified IP range only

[LifeMaster]

I have a PC as a main server with WinGate6 installed. This computer connected to the internet and city network which has IP range for example 215.215.1.1 -- 215.215.100.255.

In my office LAN I have 30 PCs.. I need all my office LAN PCs to be connected via WinGate SOCKS5 to the city network IP range only...

I can do this but HOW to restrict them from accessing IPs other than 215.215.1.1 -- 215.215.100.255 ??

In other words, how can I let them connect to the city network IP range but not to the internet?

Thank you.

PS: Don't ask me why SOCKS5 only or why not using NAT. I can't do that because of some software installed on each PC in the office LAN.

[genie]

You have to create a policy for SOCKS service, which allows only this range of IPs to be connected to.