talk doesn't work when talking user on machine having more than one IP address (talk 0.16-3 and talk-server 0.16-3). Problem is probably only in client - when using another one (from some non-RH distribution), it works ok.
*** Bug 2094 has been marked as a duplicate of this bug. ***
I couldn't replicate this using RH62 talk/talk-server and/or RH7x talk/talk-server. Both computers had ntalk/talk servers on. Initially I had some problems initializing the connection when I tried to talk over non-default route -interface, but killing inetd's and such made it work properly. The IP addresses of both ends have be be in hosts/DNS though.