problems receiving e-mail to my server redux

[Ed McCorduck]

> -----Original Message-----
> From: redhat-list-bounces at redhat.com 
> [mailto:redhat-list-bounces at redhat.com] 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? 

For my home network, yes. It's the static IP address assigned to me by
my ISP, to which I am connected by a cable modem. The cable goes through
my router, where the firewall is. 


> 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.

O.K., I hadn't set port 53 to be forwarded to 192.168.1.101, but I
changed that but still any e-mail sent to me is bouncing. BTW, by saying
"these ports" in your question above, did you mean that there's a
separate port number for udp? All I saw on my router's configuration
screen was that port 53 was for "DNS." 


Ed McCorduck
Department of English
117-A Old Main
753-2093
http://mccorduck.cortland.edu 
ICQ: http://mccorduck.cortland.edu/pager 
AIM: EdMcCorduck