Help with "programming" packet filter

[Marcus J. Ranum]

taku at cathedral.cerc.wvu.wvnet.edu (Takumei So) writes:

>    The machine I'm using is a ultrix machine, DECstation 5000 running
>ULTRIX V4.0 Rev.179.  I'm running it as su, and the interface is set to
>promiscuous mode.
>    Any help, or example codes for using packetfilter, will be greatly 
>appreciated!!!

	I think 4.2 comes with the packet screen daemon - which is a table
driven packet filterer - very useful for screened IP gateways. I don't know
if the source to it is something that can be given out or not. I'll defer
to the author.

mjr.