Large Network DNS

ShibasScotch · Post by **ShibasScotch** » Thu Jan 08, 2004 12:55 pm

I have 2 servers. Mail, and mailserver. Because of the way my former boss set up our email was crap. The server named mail is no longer our mail server. it was at one point, but not anymore. the new server that is hosting out mail is mailserver. our email if visited through http as so

"http://mail.xxxxxxxxxxxxxxx.org:8383"
the problem is, that internally, we have a server called mail, that isnt the mail server! so when i try to lookup mail.xxxxxxxxxxxxxxx.org:8383, it tries to redirect me to the server named mail! From the outside, this works great. but from the one building where it is hosted, it is screwed. the last guy setup outlook to directly link to the ip 192.168.40.xx, which works, except for the people with laptops that take them home.

I cant rename the servers, because of all the crap that the finance department relies on, as well as drivemapings from 8 different buildings that all access it from terminal services.

I have set it up so that it is now hosted from "mailserver.xxxxxxxxxxxxxxx.org" and it works great from the inside, but the outside can still only see "mail.xxxxxxxxxxxxxxx.org" How can I set the outside address to see the other server? The reason i need this is because when I want to set the people in outlook, i need it to be consistant for the ones with laptops.

This has been racking my brain for the last month, I think I have read everything on DNS on the web

Thanks for you help in advance!

-Tim

ShibasScotch · Post by **ShibasScotch** » Sat Jan 10, 2004 1:16 pm

anyone ?

TheManiacal1 · Post by **TheManiacal1** » Fri Feb 06, 2004 2:58 pm

this really has to deal w/ how your DNS is setup. if for instance, your DNS records are held by your ISP or webhost, then you will need to have them change the DNS name from mail. to mailserver. If you host all DNS in house, then you'll want to check the following:

1) router/firewall - forwarding for DNS names
2) DNS configuration on webserver

if you're running Linux, it's some conf file you have to edit... i forget which. 2000 server has DNS manager. i realize it's a vague response, but i'm not sure how your shop is setup.

Magexx9 · Post by **Magexx9** » Thu Feb 26, 2004 7:44 pm

Themaniacal1 has got it. Also want to look into dns for mail servers and other servers. A host name can be mapped to different canonical names depending upon whether it's mail or something else. The OS you're using would be helpful as well.. I'm assuming Microsoft.

ShibasScotch · Post by **ShibasScotch** » Fri Mar 12, 2004 10:19 pm

heh sorry, I gave up on this post after noone had responded for a week

anyway, yes we are using Microsoft servers, both the one hosting the mail, and the one hosting the DNS internally are 2000 server. The DNS to visit on the web is done from a web host. I have added the records to it for this new mailserver, and it works alot of the time, but not all the time. Sometimes it just stops working, and wont load the page. dont know why. Still researching.

TheSovereign · Post by **TheSovereign** » Fri Mar 12, 2004 10:51 pm

insert 2 entry's for mail
one with internal ip and one with external ip the system will automatically attempt a local dns before going thru the gateway, should square u away.....this also works for www clusters

ShibasScotch · Post by **ShibasScotch** » Thu Mar 18, 2004 9:04 am

Yes, that is the way that it is currently setup. There is an internal record on my DNS server here. Internal lookup isnt the problem though. Its when you are outside of the network that it doesnt always lookup properly.