Berkeley Packet Filter for Sun's

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2 total messages Started by David Clunie Thu, 24 Dec 1992 13:48

Author: David Clunie
Date: Thu, 24 Dec 1992 13:48

16 lines
1150 bytes

I am interested in implementing a filter for controlling the flow
of certain tcpip packets based on source/destination, protocol and
possibly process/user of origin.

I gather from peeking at tcpdump that there is such a thing as the
"Berkeley Packet Filter" mechanism that can be implemented in SunOS 4.1x
if one has a source license which I don't :(

Is there anyone who has done this that could let me have the object
of the appropriately modified modules ?

I am presupposing of course that BPF will be of some use to me, in the
sense that it will allow me to selectively filter packets, rather than
just peek at them !

Thanks ... david

Re: Berkeley Packet Filter for Sun's

Author: Stew Ellis
Date: Tue, 29 Dec 1992 14:45

28 lines
1725 bytes

dclunie@pax.tpa.com.au (David Clunie) writes:

>I am interested in implementing a filter for controlling the flow
>of certain tcpip packets based on source/destination, protocol and
>possibly process/user of origin.

>I gather from peeking at tcpdump that there is such a thing as the
>"Berkeley Packet Filter" mechanism that can be implemented in SunOS 4.1x
>if one has a source license which I don't :(

>Is there anyone who has done this that could let me have the object
>of the appropriately modified modules ?

>I am presupposing of course that BPF will be of some use to me, in the
>sense that it will allow me to selectively filter packets, rather than
>just peek at them !

>Thanks ... david

Check out Weitse Venema's tcp/ip wrappers.  They are archived on many sites,
but the best place to check for them is cert.org.  They work only with tcp
and not with udp.

--
                                                          ___________________
  R.Stewart(Stew) Ellis, Assoc.Prof., (Off)313-762-9765  /   _____  ______ 
  Humanities & Social Science,  GMI Eng.& Mgmt. Inst.   /        / /  /  / /
  Flint, MI 48504      ellis@nova.gmi.edu              /________/ /  /  / /

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