I work for a very big company which has an enormous lan with the IPs like 9.xx.xx.xx. When we tryed to setup a lan game (outside working hours of course ) the server started ok but when a client wants to join we get the error: "You must enter a valid local network IP adress".

Please solve this small issue.

This is not a bug.

Quote from the_angry_angel :

Points of Interest
LFS only accepts LAN IPs in the RFC1918 range:

1. 10.0.0.0 - 10.255.255.255 (10/8)
   
2. 172.16.0.0 - 172.31.255.255 (172.16/12)
   
3. 192.168.0.0 - 192.168.255.255 (192.168/16)
   

RFC 1918.

Yes maybe it's not a bug but would it hurt to accept 9.xx.xx.xx ?

Anti-cracker protection. In S1 times, they played over Hamachi.
But i think banning Hamachi subnet (5.*.*.*) will be better than restricting everything.

Quote from Shadowww :

Anti-cracker protection. In S1 times, they played over Hamachi.
But i think banning Hamachi subnet (5.*.*.*) will be better than restricting everything.

So, can you drive with all cars in LAN?

I can't drive with all cars even in single player

Im Wrong ! ^^ :P