Hi,
I have recently built a new Windows 2012 R2 domain for a client, all of the servers reside on a virtual ESXi platform, only a few of the servers actually have internet access, for patching WSUS and anti virus downloads.
The plan is to use use "jump hosts" to only show the RDWEB portal giving users the ability only to run the required applications they need, this is a highly secure environment. Everything is deployed and working as it should with no errors and all of the applications work fine, on the first Jump Host which has internet access the RDWEB page takes just over a second to load the logon screen, BUT the 2nd jump host which does NOT have internet access due to a range of IP's being blocked reaching the proxy server the RDWEB page takes over 2 minutes to load.
If I change the IP address of the 2nd jump host, still on the same subnet using the same gateway, but is allowed internet access due to a range of IP's being allowed to reach the proxy server then the logon screen takes just over a second to load, so it cannot be the config of the server or of the RDWEB, as the ONLY difference is that the "jump host" can or cannot get to the Internet via an IP address change.
I need to deploy the same system to an enclosed environment that has NO internet access so need to understand why the "jump host" needs internet access for the RDWEB logon screen to appear in under a second.