[leaf-user] ISP and DNS issues

[John Wittenberg]

A few weeks back, our ISP decided that they were going to upgrade the mail 
servers.  On the day they were upgraded we could no longer access the mail 
servers.  My wife, who was and still may be extremely pissed, spent two days 
with the Technicians who could not help.  At the end of the second day, my 
wife mentioned that we had a router and was told that was the problem.  That 
evening I removed the LEAF router and the mail connection was _all well_ as 
the Windows XP box could connect to the mail server.  Thinking that the 
problem was with my setup of the LEAF box, I am using Dachstein CD V1.0.2, I 
set up the box to use the default Dach settings.  This still did not allow 
connection to the mail server.  At this time I was beginning to believe that 
DNS could be that problem.  About a year and a half ago, the ISP changed the 
mail server name.  Using XP's built in _firewall_  I discovered the IP 
address for the mail server and using that instead of a the FQN, I was able 
to get access to the mail server through the LEAF box with the XP Box.

So thinking that since the XP box could connect to the mail server without 
the LEAF box using the FQN, I changed the LEAF box, at least I think I did, 
to use my ISP's DNS instead of dnscache in the LEAF box.  But alass this 
_still did not_ work.  I added my ISPs servers to DNS0 and DNS1 and set 
CONFIG_DNS to YES.  Soooo, on a hunch I changed my mail Client to access the 
original mail server name and it works! Original server name = 
mail.cablespeed.com and the one that was working before the change = 
mail.bllvwa.cablespeed.com.

The real question becomes, why when using the mail server name when 
connected direct from XP it works, where as having the LEAF box connected 
using the mail server name does not work.  Is there some difference when 
using the ISP DNS versus going through the LEAF box with the ISP DNSs 
identified.

Thanks for any and all help in advance and sorry about the convoluted 
message.

John Wittenberg

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