How to move the proxy to a separate server?

Question

linux

I can’t figure out how it will be right
. I imagine it like this: the client goes to the Internet, the gateway redirects it to a proxy, which, after processing, throws it back to the gateway and then it goes to the Internet.
there are two networks 10.214.2.128/25 192.168.1.0/24 proxy 10.214.2.138 gateway 10.214.2.134 and 192.168.1.5 from all networks there must be access to the Internet. how to write correct rules?

Answer 1

add a masquerade, something like:
iptables -t nat -A POSTROUTING -j MASQURADE