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.../tcp # NETBIOS Datagram Service netbios-dgm 138/udp netbios-ssn 139/tcp # NETBIOS session service netbios-ssn 139/udp I'm using the IPCHAINS and I configured in this way: ipchains -A input -i $EXTERNAL_INTERFACE \ -s $ANYWHERE $NETBIOSPORTS -p tcp \ -d $IPADDR $NETBIOSPORTS -j ACCEPT ipchains -A output -i $EXTERNAL_INTERFACE \ -s $IPADDR $NETBIOSPORTS -p tcp \ -d $ANYWHERE $NETBIOSPORTS -j ACCEPT ipchains -A input -i $EXTERNAL_INTERFACE \ -s $ANYWHERE $NETBIOSPORTS -p udp \ -d $IPADDR $NETBIOSPORTS -j ACCEPT ipchains -A output -i...

I wrote this little program to deal with the situation where there are a number of workgroups on a number of subnets with no WINS server [actually I couldn't get this configuration to run with a WINS server - but that's another story] You run this program on machines bridging your subnets and it listens for netbios nameserver packets and forwards them. [Broadcast packets are sent on to