Jumpstation setup

Hey all,

I've created a win10 VM on a remote site ESXI host lets call it Jumpstation. The goal is for my users to use it temporarily in order to access a server application. (I don't want them logging into the server directly). VM is created and I have basic connectivity. However, from the VPN I cannot rdp into the server. My users aren't allowed to install any software on their PCs so I am hoping to do this with basic RDP and not something like vnc etc.

Testing:

-Can remote into it from same host, from a different subnet

-Can ping the the jumpstation while VPN'd into the network.

-Cannot hit any of the usual ports (443 for example) also for testing purposes I've turned off the firewall and threat detection on the jumpstation.

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I've succesfully done this at other sites that I manage. This is not one of my usual managed sites and is poorly setup. However, fixing their entire network is out of scope for this. I'm assuming their is some weird filtering happening but I've run out of ideas on where to look.

I would be much happier if it wasn't reachable at all. I've checked FMC, access-lists but can't find anything that would cause this behavior.

Question: is there something I'm missing? Any suggestions on places to look are appreciated.