Weird intermitten problem with DNS.

[itsmebcc]

Hello, I am not sure if anyone in here may be able to shed some light on
this situation, but I sure hope so.  I have a few different servers spread
across the US. Some of them are just plain old Red Hat and some of them are
Red Hat with Ensim on it.  One of my customers has several sites that get a
lot of traffic, and he has people complaining all of the time that they
cannot get to the site.  When they try and ping the domain it gives them a
"ping request could not find host domain.com".  When I have them ping the IP
it also times out.  I can always get to the domains, and the servers, but
several people have told him the same thing, so it is too much of a
coincidence.  Another weird thing is he has an AOL account that he uses
while he is on the road, and when he dial's up with that account and uses
the aol browser he can get to the domains fine, but when he dials up with
aol and then minimizes it and uses IE he cannot get to the site's.  I
figured it was just some weird aol proxy thing or something, but I don't
know.  Here are a couple of the web site's on the servers that people cannot
get to. If anyone has any idea's as to what the problem may be please post
it here. And if you don't know what the problem is could you please check
out these site's and let me know if you can get to them and what ISP you are
using (I know that is a lot to ask, but it would help a lot).

TIA

http://www.ccflonline.com
http://www.centralpowerokc.com
http://www.netmoneywizard.com


Regards