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  • Status: Solved
  • Priority: Medium
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Some computers can ping this internet address while others cannot.

Hello all,

I am trying to setup a redundant connection for my branch offices and one of the requirements is to have my offices connect to my VPN box via VPN.Mydomain.com instead of the IP address. I setup the appropriate internet records or atleast I think I did. Now the strange thing is that one office can ping VPN.Mydomain.com but my other office cannot. The office that cannot just gets a message that says "Unknown host VPN.Mydomain.com" The office that can't ping the name can ping the address just fine though.

Any ideas?
3 Solutions
You have to add vpn.mydomain.com to the dns server the office which can't ping is connected to, or if that isn't an option, edit the HOSTS file on those PCs which have to connect.
I assume you set up DNS on one side but not on the other....if one can ping the name, it's DNS or Host records are correct, all sites need DNS or Host records modified. You could also register the name with an Internet DNS through your ISP and not bother with Internal DNS

I need to know more about your setup to help you figure it out....this is my first impression
Are your internal and external domain names different?

Example:  we are company.local (internal) and company.com (external)

If your internal and external names are the same, when someone inside pings vpn.company.com, your internal DNS server says "Hey, I'm in charge of this domain", looks at its records and says "I don't have a VPN.company.com"

So you need to add an A record to the DNS of each remote office pointing to the PUBLIC address of the VPN concentrator.

If your internal and external domains are different, it might merely be a matter of propogation of the external DNS records (it takes 24-48 hours for a new DNS record to cover the entire internet)

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Steviek411Author Commented:
Thanks all. That explains it totally so I thought I would give everyone points for it!
Steviek411Author Commented:
Hey guys one more thing.

The VPN.Mycompany.com needs to resolve to 2 different addresses.
How do I create an A record that would be able to resolve to 2 different addresses?

cant do it

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