> On Mon, 15 Jul 2002, Davi Leal wrote: > > > Well, I will format and reinstall the new firewall again. I am going to do a > > 'mondo' backup copy before reintalling so as to check via "mondo difference > > reinstalled" what happened in the firewall. > > > > > > P.D.: Do you know if sendmail uses only 25/tcp?. /etc/services does not > > shows any 25/udp. > > The version of sendmail I'm running 8.12.1-5 listens on tcp port 25 and > also TCP port 587. For details regarding port 587 use, take a look at > /usr/share/doc/sendmail/RELEASE_NOTES.gz and also RFC 2476. Port 587 is > used to run a Message Submission Agent which is turned on by default. > > As far as I know, sendmail doesn't listen on any UDP ports.
Maybe, I'm not sure, some remote MTAs, for example smtp.navegalia.com, uses UDP connections. You can try "telnet smtp.navegalia.com 25" behind a firewall which filter the udp connection. Regards, Davi Leal -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
