Date: Sat, 24 Mar 2001 19:22:39 -0500 From: Bill Moran <wmoran@iowna.com> To: Robin Lo <asailkat@hotmail.com> Cc: freebsd-questions@FreeBSD.ORG, adamlau@yahoo.com Subject: Re: NAT questions Message-ID: <3ABD3A4F.86D45ABC@iowna.com> References: <F2343VsX7PVTdAMDmZ50000ad2e@hotmail.com>
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Port 138 is netbios stuff. Typical Micros~1 broadcast traffic. The solution is to remove all the Windows-based machines from you network. Barring that, I'd program your NAT box with a firewall that rejects or drops those packets. Or you could just ignore it or program ipnat not to complain about it. It's probably just the Micros~1 machines making sure everyone else on the network knows they're there every 15 seconds or whatever the default interval is. I believe on some of the Micros~1 boxes you can turn of "lanmanager annoucements" or other such broadcast options to reduce this traffic. -Bill Robin Lo wrote: > > Hello, > > I have set up FreeBSD 4.2 to be used for NAT. I have 2 NIC cards > configured for the network. The internal network is configured > with--10.0.0.0/8, and the second NIC with it's ISP default settings. > The external NIC has been tested. I am able to ping to the outside > world. I support an internal network with an NT2000 Server used for > DNS, DHCP, and Active Directory services supporting serveral Windows > /Pro/NT40/ and 98 clients. When running the NAT box i get > these messages that appear accross the screen. It occurs while > working in vi or any other programs. > > March 24 03:36:39 firewall /kernel: Connection attempt to UDP > 64.160.131.xx9:138 from 64.160.131.xx8:138 > > March 24 03:36:39 firewall /kernel: Connection attempt to UDP > 10.255.255.255:138 from 10.10.1.1:138 > > March 24 03:36:39 firewall /kernel: Connection attempt to UDP > 10.255.255.255:138 from 10.10.1.3:138 > > March 24 03:58:38 firewall last message repeated 2 times To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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