Information re: Cyberpromo

Dalvenjah FoxFire dalvenjah at
Tue Jun 3 19:05:10 UTC 1997

Martin J. Hannigan put this into my mailbox:
> > 
> > Martin J. Hannigan put this into my mailbox:
> [ snip ]
> > Two months with these filters, and no complaints yet.
> Was that some wrappered service? Looked like tcp_wrappers.
> I think a router with enough memory would be a better performer
> for filtering activies at that layer.

What I actually did was take sendmail 8.8.5, #define TCPWRAPPERS, and
then modify the code so that it calls hosts_ctl (the function that checks
/etc/hosts.deny) on connect, not just on MAIL FROM. Yes, this causes remote
sites to churn if they get denied, but from the syslogs, there really aren't
that many people who try for that long.

The exact patch was posted to bugtraq a while back. If you're interested,
please mail me privately.


 Dalvenjah FoxFire (aka Sven Nielsen) "The weapon which causes the most
 Founder, the DALnet IRC Network       damage to the Internet is
                                       the keyboard."
 e-mail: dalvenjah at             WWW:
 whois: SN90                           Try DALnet!

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