Hypothetical question about DNS sub domain resolution- I work at a firm, whose address resolves mycompany.com. Assuming I have a block of 5 IP addresses and map an address of to pass through my firewall to a terminal server on our internal LAN (for example using port forwarding) at an address like terminalservices.mycompany.com... Do I need to contact my DNS provider to create the record, or will it resolve correctly automatically when the query hits the DNS? Assume the firewall is a Cisco ASA in the small end of the 5500 series.

Thanks for your help

  • Just to be picky, that's not a subdomain, it's an A host record for your domain. – Trondh Jan 24 '14 at 12:53

You need to have DNS terminalservices.mycompany.com pointing to correct IP. This does not happen magically:) But you DNS provider could have put for you a wildcard dns for all subdomains to point to same IP lime primary domain. You just need to check what it resolves to.

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.