Subject: Re: NAT translation for NETBIOS -
To: None <>
From: Wolfgang Rupprecht <>
List: netbsd-bugs
Date: 09/13/2002 12:34:33 (Manuel Bouyer) writes:
> On Fri, Sep 13, 2002 at 11:49:39AM +0530, Alok  Singh wrote:
> > I want to know the deployment scenario under which the NETBIOS works fine
> > properly for the current BSD implementaion.
> This seems to be a pure win2k issue. The NAT NetBSD router will just change
> the IP address in the IP header, it won't do any special handling for
> NETBIOS packets themselves.

Most of my understanding of netbios is from examining the ipf filter
log entries that the script kiddies so kindly insure that I have
plenty of.  They always try to connect from port netbios-ns to port
netbios-ns.  I assume the src_port == dst_port is important.  If NAT
remaps that port on the NetBSD side things may not work.

    Sep 9 09:05:20 capsicum ipmon[134]: 09:05:20.005156 tlp0 @100:2 b[],netbios-ns ->[],netbios-ns PR udp len 20 78 IN

       Wolfgang Rupprecht <>
      Hackers don't spread viruses.  Microsoft spreads viruses.