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domain name not resolving with server externally

Hi, current setup is windows 2008 standard with exchange 2010.

There is no external communication at the moment with the server when resolving with DNS.

eg: to access owa we should be able to go to https://mail.xxxxxx.com/owa and then all is fine.

However this is no longer working - page cannot be found. But if i type in the IP address like

https://29.12.124.44/owa this works fine (ip address is just an example)

We cannot send emails externally or receive externally.

Not really sure where to start with this one.

Any help is much appreciated.
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cybertechcomputers
Asked:
cybertechcomputers
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2 Solutions
 
NivleshCommented:
have you checked to ensure your dns registration is still active and not expired? if you want i can check it if you post your domain name (that is if you dont mind revealing it)
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cybertechcomputersAuthor Commented:
mail.altum.com.au - thank you for your help
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andossCommented:
Your dns registration doesn't seem to be active.
You can perform your own queries at - http://www.dnsstuff.com/
Would suggest you contact whoever you registered altum.com.au with.
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NivleshCommented:
hi.

Your dns registration is not properly setup. There are no MX entries so servers are unable to locate your server. Also you need an A record for mail.altum.com.au so that you can reach the server using that name. So basically you need the following

MX for altum.com.au pointing to mail.altum.com.au
An A record for mail.altum.com.au with your external ip address

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cybertechcomputersAuthor Commented:
Thank you for the advice, in the mean time i was on the phone to our dns provider. Apparently somehow someone has requested a dns change name to a site called worldsecuresystem.com

All they could provide me with was the time it was changed and how it was changed. But not who authorised it.

Anyway its in the process of getting changed back. takes up to 24 hours to be updated globally. Fingers crossed
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NivleshCommented:
Yup I can confirm that according to this http://whois.domaintools.com/altum.com.au

your dns was changed at 07-Mar-2011 04:45:57 UTC

It is quite strange that your dns provider wasnt able to tell you who authorised the change. Normally dns changes are closely guarded. Unless you have a portal access to change the dns (even then it will be logged), you have to call your provider and they will ask you alot of authorising questions before they change it for you. I would seriously consider going back to your dns provider and getting them to tell you who did the change.

Regards
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cybertechcomputersAuthor Commented:
Yeah i asked them who authorised it and all they could say is that if they logged into the account using the right details they could change it simple as.

I done the same over the phone. provided them with the login username and password and they changed it back straight away - no questions asked.

So i guess somehow the password has been breached. Time to change all the passwords.

Do you know if there is a way to tell what ip address it was used to change the details.

I was on my honeymoon a few weeks ago so they called another IT guy in while i was away. Not suggesting anything but you never know.
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NivleshCommented:
those details will be private to your dns provider so only they would be able to tell you . sorry
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cybertechcomputersAuthor Commented:
i found out that the website hosting company needed to change the dns setting for the site. but instead of changing the www. they changed the mail.

Dam hippies

Thank you both for your help
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