what the appropriate DNS name I should use, and any side effect?

[Hanry Zhou]

We need to setup a server on another site where usually use the domain name ".x.y.comp-name.com" since it has it's own dns server, as supposed to be here, we use ".a.b.comp-name.com".

Now, if I use the node name "node.a.b.com-name.com" that we usually use on this site, is there any potential problems?

Thanks,

[Steven E. Protter]

Shalom,

One potential problem is mail from node.a.b.com-name.com will not be accepted by public internet email servers.

You can make this work with DNS zone records supporting both domains you mention above.

HP-UX will not accept any section between periods being more than 8 characters unless you are 11i v2 and have extra software installed.

SEP

[Hanry Zhou]

Can you please explore it a little bit more as for why node.a.b.comp-name.com will not be accepted by public inernet email servers?


I was concerning about the time spent on resolving the ip address, because it will go through the local dns server.

Anybody?

[Steven E. Protter]

Shalom again.

the hostname node.a.b.com-name.com does not resolve on the public Internet.

Try it, nslookup or dig node.a.b.com-name.com

Public mail servers often check two things.
1) Is there a valid reverse DNS lookup record.
2) IS the domain name valid.

If either test does not give a good answer, the mail is rejected, or worse yet dropped, making you think it got there, when it never did.

SEP

[Hanry Zhou]

I don't quite understand what you are saying. Hopefully, you undestand my original questions.

why if I use node.remotesite.domainname.com, then it will cause the email problem? On my local DNS domain server, can I still resolve node.remotesite.domainname.com ?

Also, whether or not I can send out the email is not my main concern, because we dont' send emails from servers anyway. My main concern is if there will be other issues.

Maybe I should repeat my question again.
usually, we give any new server name as "servername.localdominaname.com".
now, if I want to give the server name as "servername.remotesitedomainname.com", would that cause any problem? each site has its own dns server.