Firewall, blocking POP3

Jorge Biquez jbiquez at
Wed May 30 18:47:50 UTC 2012


Thanks a lot!. Simple an elegant solution.

I just did that and of course it worked.... I just was wondering... 
what if I need to have the service working BUT want to block those 
break attemps? IN this and other services. ?
My guess is that it is a never ending process? I mean, block one, 
block another, another, etc?

What the people who has big servers running for hosting services are 
doing? Or you just have a policy of strng passworrds, server 
up-todate and let the attemps to try forever?

Thanks for the solution Mr Robert.

Jorge Biquez

At 01:32 p.m. 30/05/2012, Robert Bonomi wrote:
> > From owner-freebsd-questions at  Wed May 30 13:16:37 2012
> > Date: Wed, 30 May 2012 13:08:30 -0500
> > To: freebsd-questions at
> > From: Jorge Biquez <jbiquez at>
> > Cc:
> > Subject: Firewall, blocking POP3
> >
> > Hello all.
> >
> > I am sorry if the question is too basic.
> >
> > I have a personal small machine running
> >
> >     FreeBSD 7.3-PRERELEASE #0:
> >
> > It runs as my web and email server for a cuple of domains. NO clients
> > no other users have access to it.
> >
> > Is there any , easy/faster way to stop POP3 from being working. I am
> > running qpopper to be able to download emailes.
> > I decided to use sendmail since only a few accounts are there and I
> > do not need more but in the last days the server has been under a big
> > attack where people is trying to guess users and passwords. I am
> > using a strong schema of passwords so no problem on that but I rather
> > to be sure .
>The mail -server- you use is irrelevant to how users retrieve mail.
>you can use sendmail and qpopper, or sendmail and an IMAP server, or
>sendmail and  webmail app, or postix and qpopper, or exim and qpopper,
>All you have to do to disable qpopper is edit comment out the line in
>/etc/inetd.conf, and SIGHUP inetd.
>To re-enable when you need it, uncomment the line, and SIGHUP inetd again.

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