I am able to ping device with IP 10.100.0.10, but I am unable to access it via http/https web administration, it does not load.
I can also access web administration of the router with IP 10.100.0.1 from the tunnel
Here is rough topology pic:
Now.. I've done I think everything I found on random guides on the internet that were supposed to solve this problem.
1. Added push "route 10.100.0.0 255.255.255.0" in the server config, so the remote client (my PC) knows where to route this seemingly unknown network when trying to access it.
2. Added this routing to the cisco router that serves as default GW for the LAN on remote site, so clients from LAN can also with help of default GW route traffic back to the server where openvpn is running:
3. Added firewall rule on the router to allow traffic from openvpn range 10.100.0.0/24 towards LAN
4. Enabled IP routing in registry on the server as well as on both interfaces (ethernet and TAP interface) of course the server was rebooted
5. Even tried creating windows firewall rule to allow bidirectional communication between both ranges (10.100.0.0/24 <-> 10.100.1.0/24)
I am honestly just lost now, no idea what to do next.
This is my server config right now, I also tried enabling the topology subnet but it changed nothing in the situation..
ca "C:\\Program Files\\OpenVPN\\config\\ca.crt"
cert "C:\\Program Files\\OpenVPN\\config\\server.crt"
key "C:\\Program Files\\OpenVPN\\config\\server.key"
dh "C:\\Program Files\\OpenVPN\\config\\dh2048.pem"
crl-verify "C:\\Program Files\\OpenVPN\\easy-rsa\\pki\\crl.pem"
server 10.100.1.0 255.255.255.0
push "route 10.100.0.0 255.255.255.0"
keepalive 10 120
tls-auth ta.key 0
status "C:\\Program Files\\OpenVPN\\log\\openvpn-status.log"