URL:
<http://gna.org/task/?func=detailitem&item_id=2968>
Summary: ban spammers IP
Project: Gna! Administration
Submitted by: yeupou
Submitted on: samedi 25.02.2006 à 12:47
Status: In Progress
Approval Status: None
Should Start On: samedi 25.02.2006 à 00:00
Should be Finished on: samedi 25.02.2006 à 00:00
Category: Day-to-day
Priority: 5 - Normal
Privacy: Public
Assigned to: yeupou
Open/Closed: Open
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Details:
I intend to put in place a system that would ban spammers IP for a given time
- like one hour.
I still does know yet how to put that in practice
http://www.exim.org/mail-archives/exim-users/Week-of-Mon-20060220/msg00071.html
Now, my idea is to use exim to store IP somewhere with a timestamp and to
have a script that would update /etc/hosts.deny on a regular basic.
I though of using xinet.d no_access but it would require to restart xinetd
regularly and I do not like that (especially since I noticed sometimes it
does not restart properly). xinetd reads /etc/hosts.deny and I think it does
without restarting - I have to test that.
I guess this piece of code would have a public interest and as daemonzup or
alikes piece of small software, I would make it public on a specific project
at Gna! instead of adding it to gnapgnap.
If my current assumptions about hosts.deny are right, to keep thing simple, I
would have:
- a perl client that fills a database with IP and timestamp
- a perl script that would update hosts.deny according to the database
Maybe starting a perl client each time would be a problem, maybe it should
somehow be a daemon (ideally not over tcp/ip for security reasons).
So I'll first check my hosts.deny thing and then see what to do.
Banned spammers would be: IP that got denied at SMTP time due to DNSBL or IP
that got caught sending a spam to a mailing-list with a score higher to 13
(sent directly to /dev/null).
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