[ale] Porn filters

[Fulton Green]

If you did it at the iptables layer, your SMTP server wouldn't be able to
send out a nastygram. iptables might need to take the REJECT action in order
for the sender's SMTP service to detect a problem.

Dammit, Jim, I'm a software developer, not a sysadmin. :)

On Mon, Oct 07, 2002 at 11:10:52AM -0400, Matthew Brown wrote:
> Sounds intersting...  I guess one would accomplish this with iptables
> when the SMTP server is trying to connect to the client's SMTP server?
> Or would you suggest doing it at the SMTP server side?
> 
> Has anyone tried something like this in iptables?
> 
> 
> -----Original Message-----
> From: ,,, [mailto:fultongr at greenie.frogspace.net] On Behalf Of Fulton
> Green
> Sent: Monday, October 07, 2002 10:59 AM
> To: Matthew Brown
> Cc: 'Atlanta Linux User Group (E-mail)'
> Subject: Re: [ale] Porn filters
> 
> 
> I've noticed (from personal experience) that MX.CompGen.com now blocks
> incoming mail from servers that don't have matching forward and reverse
> address lookups. That might block out a few legit servers (which should
> probably be fixed anyway), but it will definitely take care of 80% of
> all
> spam (pr0n/pyramids/mortgages/health aids/etc.), with the other 20%
> either
> being easily-blocked professional spammers or easily-contacted legit
> I[SP]Ps that happen to have a yet-to-be-discovered spammer . Your server
> daemon could be set up to automatically send a nastygram to legit
> addresses
> not following the forward/reverse lookup paradigm.
> 
> On Mon, Oct 07, 2002 at 10:45:19AM -0400, Matthew Brown wrote:
> > I have a client asking for some way to stop receiving all the porn
> they
> > are barraged with.  They want to filter stuff not so much on the web
> > side, but also on the email side.  For some reason they get a ton of
> > porn mail.
> >  
> > Beyond simply setting up email client rules and education, does anyone
> > have a silver bullet?

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