OS: Linux 2.4.4-smp with iptables v 1.2.1a
with rcpt-server i mean the mean the highest prior MX server from the dns
server.
I have no mail server in DMZ
I've used the following rule:
iptables -A OUTPUT -p tcp --dport smtp -s myip -j -m state --state
NEW,ESTABLISHED ACCEPT
-----Ursprüngliche Nachricht-----
Von: Brett Randall [mailto:[EMAIL PROTECTED]]
Gesendet: Montag, 13. August 2001 17:18
An: Wolfgang Pichler
Cc: QMail Mailling List
Betreff: Re: off topic
>>>>> On Mon, 13 Aug 2001 16:56:32 +0200, "Wolfgang Pichler"
<[EMAIL PROTECTED]> said:
> Hi
Mornin.
> It's a little bit off topic,
comp.security.firewalls
comp.os.linux.networking
> but does anywhere know which ports to open on my firewall so that
> qmail works correctly.
25 outbound if you only want to send e-mail to external sites. 25
inbound as well if you have a mail server in a DMZ.
> At the moment I've opend dns,smtp and pop3 but when i activate the
> firewall some messages can't be delivered (wasn't able to establish
> an smtp connection),
Log entries? Kernel details? OS even? There is a big diff between
Linux and FreeBSD. Hec, there is a big diff between Linux v2.0, v2.2
and v2.4 firewalling. How are we meant to help you if we don't even
know the foundation?
> but when i try to telnet to the specified rcpt-server everything
> works really fine.
rcpt-server = really crazy parrot tarot-server? What do you mean,
rcpt-server? Do you mean the remote MX?
> So what happend here ? (if i open the firewall for everything, then
> the messages are leaving the queue)
Nice... I think it's probably safer you leave the firewall
open. Really.
--
"Bubble Memory, n.: A derogatory term, usually referring to a person's
intelligence. See also vacuum tube."
- The Devil's Dictionary to Computer Studies
