Resolve client hostname on a Synology VPN Server

Qaldak

Hi

On my Synology NAS an OpenVPN Server is running.
With another Synology NAS I connect to VPN Server as a client. This works.

Connect to the client with IP-address works fine. But if I try to connect from server to the client with client hostname, the hostname cannot be resolved.

How can I push the client hostname to the server?
Is following still the only possibility: https://openvpn.net/archive/openvpn-users/2006-10/msg00119.html
Does it works on Synology DSM 6?

If not necessary I try to avoid installing DNS Server or complex code/scripts.

Use case:
From Server it back up to client. Because it's not sure the client always get's the same VPN IP-address, I would connect with hostname.

Alternative:
If hostname is not possible, maybe it's an option to use a static VPN IP for this VPN client.

Qaldak

I found another post. It should be possible with "dev tap": https://forums.openvpn.net/viewtopic.php?t=19967#p55586

But actually, I use:

dev tun

Is there a possibility to resolve with "dev tun"?
Which disadvantages exists with dev tap? Would it work on Synology?

TinCanTech

DNS works equally over --dev tun or tap ..

Qaldak

Can you give more details please?

TinCanTech

Just setup what ever DNS you NAS server has built in and use that .. it will work over a vpn.

Qaldak

I setup DNS server, but I couldn't solve VPN client name without static IP. With static IP it resolved the name correct.
Actually I just use static IP.