I'm experiencing the weirdest of problems here. I can remote into other DCs in our domain from this one, but I cannot remote into it from outside the site that it controls. Remote Desktop is enabled and I compared it with all other DCs in the domain that aren't experiencing this issue. The settings are identical with regards to the firewall settings, ADDS settings, Sites and services settings. I can remote into it from within the LAN that it controls, but not externally. I can even ping it by DNS name from other DCs.
I don't even see how it could be our router(cisco), because we have another DC that is on the same site behind the same gateway, with the same settings and that works just fine.
Can anyone with the knowledge to help resolve this assist? I would really appreciate it.