On 28/12/2020 12:46, Chris Green wrote:
> If a router 'supports VPN' what does that actually mean?
>
> Presumably it doesn't mean that the router runs as a VPN server, or
> does it?

Yes, decent routers such as the ASUS range (I'm currently using a
RT-ac86u), have built in VPN clients (PPTP, L2TP and OpenVPN) and severs
(PPTP, OpenVPN and IPSec VPN).

> If my router supports VPN (which it does, a Draytek 2860N) and I
> enable it what else needs to happen to make it useful?  ... and what
> does my LAN behind the router look like, is it *all* on the VPN by
> default or what?  ... and how do I connect a remote system to the VPN?

If your router supports a VPN server, everything on your LAN works as it
does now say on 192.168.1.x but there will be an extra subnet say
192.168.2.x on which any devices connected to the VPN will appear on.
For those external devices they will think they are part of the
192.168.1.x LAN.

When you create your VPN on the router, it will export a configuration
text file, which you use with your OpenVPN client. Depending on the
router this will either be usable as is (as my ASUS was) or need a
little editing (some clients need it split in to config, key and cert
files).

---druck

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