How to set up routing on ubuntu, router, via vpn?

Question

linux

A website and an openvpn server run on a vps server.
The home computer (Ubuntu) is connected to the Internet via a wifi router.
The problem is the following. Two options for connecting to vpn:
1) If I connect to vpn from a wi-fi router, then vps / site / ip is not available from my home computer and does not respond .
2) If I connect to vpn directly from my home computer everything is ok .
How to set up routing so that ssh / site is available in the first option?
Routing tables on first option :
ubuntu machine:

$ route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         192.168.0.1     0.0.0.0         UG    600    0        0 wlp6s0
link-local      *               255.255.0.0     U     1000   0        0 wlp6s0
192.168.0.0     *               255.255.255.0   U     600    0        0 wlp6s0

wifi router:

[email protected]:~# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         10.8.0.5        128.0.0.0       UG    0      0        0 tun0
default         a.b.c.d   0.0.0.0         UG    0      0        0 rmnet0
10.8.0.1        10.8.0.5        255.255.255.255 UGH   0      0        0 tun0
10.8.0.5        *               255.255.255.255 UH    0      0        0 tun0
10.184.69.0     *               255.255.255.0   U     0      0        0 rmnet0
128.0.0.0       10.8.0.5        128.0.0.0       UG    0      0        0 tun0
w.x.y.z    a.b.c.d   255.255.255.255 UGH   0      0        0 rmnet0
192.168.0.0     *               255.255.255.0   U     0      0        0 bridge0
239.0.0.0       *               255.0.0.0       U     0      0        0 bridge0

vps:

[email protected] ~ $ route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         static.65.57.20 0.0.0.0         UG    0      0        0 eth0
10.8.0.0        10.8.0.2        255.255.255.0   UG    0      0        0 tun0
10.8.0.2        *               255.255.255.255 UH    0      0        0 tun0
138.201.57.64   static.65.57.20 255.255.255.192 UG    0      0        0 eth0
138.201.57.64   *               255.255.255.192 U     0      0        0 eth0

wxyz - vps ip
abcd - provider ip

Answer 1

Should we come up with configs ourselves?
On the "computer" I do not see a VPN route at all, so we believe that you are lying and the "computer" is not connected to the OVPN server. :)
Also, do not forget that in the server config there must be a push route to the internal subnet of the "server", the same Ndinx does not accept connections on the tun interface.