Great Circle Associates Firewalls
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Subject: Packet filtering/screening with SunLink ISDN anyone?
From: sten @ ergon . ch (Sten Gunterberg)
Date: Tue, 2 Nov 93 23:11:58 +0100
To: firewalls-contrib @ ergon . ch

Hi Firewallers!

[ I have already asked this on the sun-managers list, 
  but with no luck. Sorry if this is a duplicate for you... ]

We have now been using SunLink ISDN 1.0 for dial-up connections using
SS 10s and LXs (running SunOS 5.2) for some weeks. So far everything has
been really nice and smooth, works like a charm. 

Now, what seems to be missing is filtering/screening (based on criteria
from the packets: addresses, port numbers, etc). As we are also using
Morning Star's PPP here, we have kind of gotten used to their "thing",
(which I think is very good).

After RTFM isdnio(7), pfmod(7) and using snoop(8), I think that it must be 
possible to implement. So, has anyone already done it? Reasons against doing
it that way? Other ways of doing it? 

Even if it is not possible to implement something similar to MST-PPP's
capabilities, any kind of filter is better than no filter :)

Thanks in advance.

-- Sten

----------------------------------------------------------------------------
Sten Gunterberg, sg @
 ergon .
 ch, /C=CH/A=arCom/P=EUnet/O=Ergon/S=Gunterberg/
GCS d-(++) p-(+)(---) c+++ !l u++++ e-(*) m+(---) s/++ h-- f+ !g w+ t+ y+(*)
           Friends come and go, but enemies accumulate.
                         -- Unknown


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