Redirect External IP to internal IP

[ITtech35]

Hi

 

Is this as simple as creating a new A host with the external IP as the name and putting the internal IP as the IP?

 

Thanks

[Marci]

No. An IP Address is not a Domain Name. Direct IP resolution isn't handled by DNS, it's handled by routing / proxy. DNS only handles name-to-address resolution. What specifically are you trying to achieve?

[Jawloms]

Are we talking port forwarding on the firewall?

[FN-GM]

The about is correct apart from it is handled by NAT (network Address Translation) not by proxy. You would also need to make firewalls rules to allow it through.

 

If you're using IPv6 you're internal and external address will be the same and you just need to open up firewall rules.

 

Thanks

[ITtech35]

I thought this might be the case. we have a helpdesk which i want staff to have one shortcut to (external address) unfortunately in school we can't browse to the external address, i guess i need to get in touch with the internet provider then

[Marci]

Don't think your internet providers will be able to do a great deal.

Assuming your staff use a domain name to access externally rather than typing in the IP address, you just add the same domain name entry (not the external IP) to your internal DNS servers, resolving to the internal IP (ie: nslookup any of our web servers against our internal DNS servers, they reply with the internal IP address. Do it from home against a public DNS server, they reply with the external IP address).

If they don't use a domain name to access it externally, buy one and start (or use a subdomain of an existing domain name).

Edited February 27, 2018 by Marci

[JackCPickup]

The about is correct apart from it is handled by NAT (network Address Translation) not by proxy. You would also need to make firewalls rules to allow it through.

 

If you're using IPv6 you're internal and external address will be the same and you just need to open up firewall rules.

 

Thanks

 

If you're hosting web servers internally you should be using a reverse proxy, so forwarding would need to be set up there. In addition to yours and the above though ofc