Hi,
We have a situation where we are setting up RDS for externally outsourced staff and as such they are only connecting to selected apps which will allow through RDS Web.
Currently 443 is the port used for our mail server web access and cant be used for RDS. As a result I went through to the Transport Settings configuration in the RD Gateway Properties and updated the HTTPS Port from 443 to 4321.
I then proceeded to open and forward to correct ports on all the firewalls. Internally this works perfectly (also tested via VPN), but when trying to access externally it didn't want to work. I kept getting an error saying the Remote Desktop Gateway was unavailable.
So using the trusty fiddler tool I checked it out to see what connections where going on. Turns out that when remote app session was still trying to establish a connection using 443 and not the port specified.
I was under the impression that for external connections the gateway is used as a middle-man to connect to the internal network and connects over the HTTPS port specified and the UDP port.
Is there anything I'm missing here? Please help.
Thanks
Phill