Routing packets through a proxy on another network

I'm having trouble getting some UDP packets to a server from a client on
one network, but they get through from another, and the two clients can see
each other. How can I route the packets from one client to the other, using
the second as a proxy?

My first inspiration was to route to the 2nd client, then NAT to the
server, but routing doesn't work that way. Can anyone suggest a more
complete solution?

Kenneth Porter <shiva.blacklist@sewingwitch.com> wrote in
news:Xns9504A14921A56shivasewingwitchcom@216.196.9 7.132:

> I'm having trouble getting some UDP packets to a server from a client
> on one network, but they get through from another, and the two clients
> can see each other. How can I route the packets from one client to the
> other, using the second as a proxy?
>
> My first inspiration was to route to the 2nd client, then NAT to the
> server, but routing doesn't work that way. Can anyone suggest a more
> complete solution?

Just a followup that I got something working. I use DNAT on the first
client to route the packets to the second client, then a combination of
SNAT and DNAT there to bounce them to the server and direct the replies
back along the same path.