Both myself and the company i work for are with the same ISP, a fairly small one, and we have both been assigned IPs in the same range i.e. 111.111.111.111/16.
My company has their IP assigned to the eth0 of the router and an internal address on eth1 of the router.
The router is configured to forward HTTP and RDP requests to one of our servers on the relevant port.
My works website is hosted on this server and the URL resolves to my works static IP.

I can browse all websites fine from home except one, my works website, which i cant access by IP address either.
I can however access my works website when using an anonymous proxy from home.

Ive just recently noticed as well that i cant RDP to the above mentioned server, even though port forwarding has been configured and "allow remote connections" has been enabled on the server.
I can RDP to the server from my work PC to the internal IP of the server.

Ive spoken with my ISP whos "IT Manager" is supposed to have called me back 2 weeks ago to resolve.

What could be the problem here? Im guessing its a problem with my ISPs DNS servers?

Any help would be appreciated cos im stumped.

Cheers