[Bug 33008] UDP listening on specific IP address does not work properly

http://bugs.winehq.org/show_bug.cgi?id=33008

--- Comment #14 from Erich Hoover  ---
(In reply to decimusmaximus from comment #12)
> ...
> Two interfaces: IF-A and IF-B, there is NAT (masquerading) running. IF-A is
> LAN, IF-B is interface with public IP.
> ...

I'd also like to reiterate that I need to know how you setup your masquerading
to help with this issue.  For the type of behavior it seems that you're
expecting you need to be using "Destination NAT" instead of "Source NAT".  For
details on the distinction between the two this article may be helpful:
http://www.netfilter.org/documentation/HOWTO/NAT-HOWTO-6.html