[Help] Accessing remote lan from my system

Hi guys,

I’m trying to access a remote lan via my system. Apologies I’m naive at networking, I shall try explaining it as detailed as possible.

I have a windows server with public ip and internal lan let’s say 10.131.7.2 This is bastion host which can talk to other private lan 10.131.7.1/24 range.

Now I have my laptop with Ubuntu installed and I want to access the remote ( windows server ) lan with all 10.131.7.1/24 access on all ports. My Ubuntu is 192.168.2.5 broadband ADSL line natted

I figured out I have to use VPN method I tried openvpn and wire guard to setup but I failed many times.

As remote server is Windows we can’t use ipables I’m unable to set this complex route maybe?

Could someone point me in right directions with any tutorials or such.

I know this is really an easiest for you guys but I’m unable to move forward.

Please help .

Cheers!