> -----Original Message----- > From: redhat-list-bounces@xxxxxxxxxx > [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Ed Greshko > Sent: Wednesday, July 14, 2004 10:06 AM > To: General Red Hat Linux discussion list > Subject: RE: problems receiving e-mail to my server redux > > > On Wed, 2004-07-14 at 19:11, Ed McCorduck wrote: > > > Here's what my ISP told me about any blocking of smtp connections: > > > > > Road Runner does not block any significant ports on your > connection. > > > The Road Runner service only blocks ports 137-139 > inclusive for the > > > security of your system. These blocked ports will not affect > > > connectivity > > There is nothing wrong with the connection to sendmail at your site. > > [egreshko@misty egreshko]$ telnet 24.24.15.155 25 > Trying 24.24.15.155... > Connected to syr-24-24-15-155.twcny.rr.com (24.24.15.155). > Escape character is '^]'. 220 edsgate.mccorduck.ws ESMTP > Sendmail 8.12.8/8.12.8; Wed, 14 Jul 2004 09:54:44 -0400 quit Well, that's comforting to know, at least. Thanks, Ed. > The problem is still in DNS.... > > [egreshko@misty egreshko]$ host -t mx mccorduck.ws > ;; connection timed out; no servers could be reached > > A quick nmap scan of your host shows.... > > Port State Service > 22/tcp open ssh > 25/tcp open smtp > 80/tcp open http > 110/tcp open pop-3 > 111/tcp open sunrpc > 135/tcp filtered loc-srv > 136/tcp filtered profile > 137/tcp filtered netbios-ns > 138/tcp filtered netbios-dgm > 139/tcp filtered netbios-ssn > 143/tcp open imap2 > 445/tcp filtered microsoft-ds > 593/tcp filtered http-rpc-epmap > 1024/tcp open kdm > 1400/tcp filtered cadkey-tablet > 6000/tcp open X11 > Remote operating system guess: Linux Kernel 2.4.0 - 2.5.20 > Uptime 0.267 days (since Wed Jul 14 15:37:43 2004) TCP > Sequence Prediction: Class=random positive increments > Difficulty=5447144 (Good luck!) > IPID Sequence Generation: All zeros > > Which indicates that port 53 for your DNS server is not opened. That's interesting because, as I've mentioned in an earlier post, as suggested to me I went into my Linksys router/firewall configurator and through port forwarding specifically set port 53 to be directed to my home network's IP for my Linux box, which is my Web and e-mail server. Could a firewall on my Linux machine be blocking this? That doesn't seem likely since I checked and I have my Linux computer's firewall turned off (relying--foolishly?--on the main router firewall to protect my whole network), and besides if connections can be made to my Web server on this machine through my domain name, it seems to my tiny little newbie head that the DNS must be working somehow. Ed McCorduck Department of English State University of New York College at Cortland http://mccorduck.cortland.edu ICQ: http://mccorduck.cortland.edu/pager AIM: EdMcCorduck -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
