My laptop OpenVPN client establishes a TAP device. My client config is TUN, though. This devices shows under ifconfig /ALL with the IP 10.8.0.6
and a subnetmask of 255.255.255.252. (!!!)
This subnetmask is obviously a multi client mask setup which gives only 4 IPs from the subnet to each client.
I have troubles pinging LAN clients inside and outside the tunnel on the remote LAN and suspect the multi client mask to be the reason.
How can I change the mask to a standard 255.255.255.0?
I run a Synology Disk Station NAS in my home (remote) network with the IP beeing 192.168.0.8. The router/standard gateway is an Ubiquity ER-X with 192.168.0.1.
This NAS has an OpenVPN Server. I can connect to this server with my client on the LAN/Wifi at work (gateway 192.168.1.1; IP of my laptop in the wifi is 192.168.5.121; tunnel IP is 10.8.0.6).
The tunnel gives my laptop an IP of 10.8.0.6 and my remote server on the NAS has 10.8.0.5
I disabled my laptop firewall (Windows 10).
I can connect via my laptop browser to https://10.8.0.1:5001 which is the web GUI of the Synology NAS Disk Managment System, a GUI of the operating system.
The weird thing: I can not ping this IP 10.8.0.1 although I am connected via the browser on parallel.