> -----Original Message----- > From: redhat-list-bounces@xxxxxxxxxx > [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Cowles, Steve > Sent: Thursday, July 08, 2004 6:24 PM > To: 'General Red Hat Linux discussion list' > Subject: RE: problems receiving e-mail to my server redux > > > Ed McCorduck wrote: > > > > Thanks for your very detailed reply, Steve. I'll try to dig through > > your mine of information as best as I am able, but > unfortunately it's > > mostly way over my head at the present state of my newbie knowledge. > > Ed, > > In short... > > 1) Your domain regsitration seems to be correct. i.e. The > recursion from the root servers back to your name server is working. > > 2) Whats not working are queries to your name server; which > is listed at 24.24.15.155. Is this the public IP address for > your firewall? > > 3) The reply I got back from the above IP address was an ICMP > port unreachable. This is usually caused by your firewall not > being properly configured for NAT'ing (port forwarding) to an > internal RFC1918 address. In your case, 192.168.1.101 > > > At least I understand one of your questions, though, and perhaps my > > answer can shed more light on the problem: > > > >> BTW: Is 192.168.1.101 possibly a host behind your firewall??? > > > > Yes, 192.168.1.101 is the IP address that I maintain for my Linux > > computer, which houses my Web and e-mail (sendmail) servers. My > > firewall, which is an integral part of my Linksys router > for my home > > network, I set up through Port Forwarding to send all port > 25, 80 and > > 110 queries to this computer. > > As I suspected. Please note that DNS queries require udp and > tcp port 53 to be port forwarded. You don't mention these > ports above. Also, if your mail server is also at > 24.24.15.155, then connections to it are not working. i.e. > > telnet 24.24.15.155 25 > Connecting To 24.24.15.155...Could not open connection to the > host, on port > 25: > Connect failed > > Are you sure your ISP is not blocking inbound smtp > connections? A lot of ISP's are blocking smtp connections for > residential customers. If so, then fixing your DNS problem is > pointless. Hi Steve, 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 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
