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List:       linux-smp
Subject:    Re: Win95 bringing up link - new pppd demand dialling
From:       Eric Swanson <eswan () lips ! net>
Date:       1997-08-30 3:54:32
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At 01:25 PM 8/30/97 +1000, you wrote:
>Apparently the netbios browsing of Win95 was bringing up my link every
>few minutes. I disabled it which worked fine but now everytime I boot a
>Win95 machine on the lan diald brings up the link.
>
>I've spent a great deal of time trying to tweak the filter to prevent
>this without any luck. Not only that but running dctrl shows that the
>packet that is triggering the link coming up is from 192.168.0.1/61001
>which is the proxy serial link as far as I can tell. The second packet
>is udp/137 which appears to be filtered in the standard filter unless I
>am reading it wrong.

 udp/137 is the netbios-ns, I keep this filtered out on mine with this-
in the tcp section-
ignore tcp tcp.source=tcp.netbios-ns,tcp.dest=tcp.netbios-ns
and in the udp section-
ignore udp udp.source=udp.netbios-ns,udp.dest=udp.netbios-ns

Not sure why, but the following are accepts-
accept udp 30 udp.dest=udp.netbios-ns
accept udp 30 udp.source=udp.netbios-ns
and mine seems to work ok. 
 Now that I've -finally-(hopefully!) got my DNS working, the link only
comes up when it should.

 Make sure you've got the netbios stuff listed in your /etc/services-
netbios-ns      137/tcp
netbios-ns      137/udp
netbios-dgm     138/tcp
netbios-dgm     138/udp
netbios-ssn     139/tcp
netbios-ssn     139/udp

After that, browsing (and booting) shouldn't bring up the link, though
most of my MS-stuff is NT rather than 95, so your-mileage-may-vary.
The request showing as being from the fake slip address is typical,
maybe an artifact of IP-masq?

>On another topic altogether, I notice that ppp ver 2.31 now supports
>dial on demand. I'll wait for an rpm to come out for Redhat 4.2 and I've
>done enough kernel building to keep me satisfied for a while, but I'd be
>interested in knowing if it is easier to use than diald.

I'm curious too, but I won't play with it on my diald machine. Anybody see
any FAQ's on the new ppp?

eswan

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