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OpenBSD router +netbios forwarding

Posted on 2003-11-27
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Last Modified: 2013-12-09
I have 2 subnets

10.69.69.0/24
192.168.0.0/24

the OBSD box is acting as a router between the 2.
But it doesn't forward netbios over tcp/ip broadcasts to opposite subnets. Its not supposed to by default. But this is what I need.
I've tried using pf to rdr udp ports 137 138 139 over the subnets.
That didn't work :)

Any ideas? This is easy to do with cisco routers so it shouldn't be too hard with obsd.

here are some of my PF rule attempts


rdr on hme0 proto udp from 192.168.0.0/24 to any port { 137, 138, 139 } -> 10.69.69.255
rdr on hme1 proto udp from 10.69.69.0/24 to any port { 137, 138, 139 } -> 192.168.0.255

#rdr on hme0 proto udp from any to any -> 10.69.69.255      
#rdr on hme1 proto udp from any to any -> 192.168.0.255
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Question by:deadlast
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Expert Comment

by:gheist
ID: 9832336
NO.
You need shared WINS server like samba nmbd or windows PDC, and select it on all workstations.
Starting from Windows2000 it uses port 445 and maybe 80+443 for NetBIOS too, and you forgot nameservice - port 135... check out netstat -na just in case.
Easy if you have got DHCP, or somebody should attend all workstations ( and maybe switch to DHCP, so you get central workstations configuration in one place )
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Author Comment

by:deadlast
ID: 9832467
no I don't need any of that. I did this yesterday with a cisco router no prob on another section of my network.
All I need forwarded is;
UDP  137  NETBIOS Name Service
UDP  138  NETBIOS Datagram Service
UDP  139  NETBIOS Session Service

This is netbios over tcp/ip with windows 2000.

btw
UDP  135  DCE endpoint resolution - not nameservice
Thanks though :)
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Expert Comment

by:gheist
ID: 9837316
135 is important anyway...
check out www.sysinternals.com to see who binds where and why.
WINS is preferred way, or bridge for IPX or NetBEUI(not acttually routing anymore)
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Author Comment

by:deadlast
ID: 9849883
with these 2 things on in sysctl.conf broadcast routing should be taking place.

net.inet.ip.forwarding=1 -- allow routing
net.inet.ip.directed-broadcast=1 -- allow broadcast routing

its not.
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Expert Comment

by:gheist
ID: 9856156
and second parameter must be set on all involved machines...
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Expert Comment

by:gheist
ID: 10128886
No problem. I hope asker found answer somewhere else on the web
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