Yep, thanks. I already allow full DNS outbound from my DMZ so just enabling tcp port 25 outbound from that box will do it.
Thanks again (everyone)! Stuart > -----Original Message----- > From: Anthony E. Greene [mailto:[EMAIL PROTECTED] > Sent: Thursday, March 27, 2003 2:13 PM > To: [EMAIL PROTECTED] > Subject: Re: ports used by sendmail > > > Douglas, Stuart wrote: > > In the narrowest possible terms, what ports/protocols do I > need to allow > > outbound from a host through a firewall so that a message > generated by > > the mail command would get through? > > You'll need to allow Domain Name Service (DNS) to resolve the > MX record > and/or the A record of the destination mail server. You'll > also need to > allow SMTP for the actual mail transaction. > > grep smtp /etc/services > grep domain /etc/services > > You might only allow DNS to a local DNS server, and have that > DNS server > handle any necessary external queries. > > Tony > -- > Anthony E. Greene <mailto:[EMAIL PROTECTED]> OpenPGP Key: 0x6C94239D/7B3D BD7D 7D91 1B44 BA26 C484 A42A 60DD 6C94 239D AOL/Yahoo Chat: TonyG05 HomePage: <http://www.pobox.com/~agreene/> Linux. The choice of a GNU generation. <http://www.linux.org/> -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
