VPN not working, how to find the reason?

Question

openvpn

For example, now I took a server (scw), and immediately after its launch I run a popular automatic configuration script
* https://github.com/Nyr/openvpn-install
As a result, the connection to the server is established but there is no Internet. Ubuntu 16.04 client -> Ubuntu 16.04 server
Exactly the same settings work for another provider, but this one doesn't. Most likely the problem is in the network settings, and not the VPN settings themselves. There is a dump of ipitables

# Generated by iptables-save v1.6.0 on Tue Oct  9 09:59:04 2018
*filter
:INPUT ACCEPT [2105:235388]
:FORWARD ACCEPT [312:19676]
:OUTPUT ACCEPT [1904:249646]
COMMIT
# Completed on Tue Oct  9 09:59:04 2018
# Generated by iptables-save v1.6.0 on Tue Oct  9 09:59:04 2018
*nat
:PREROUTING ACCEPT [604:31402]
:INPUT ACCEPT [581:29357]
:OUTPUT ACCEPT [32:2432]
:POSTROUTING ACCEPT [32:2432]
-A POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to-source THIS_SERVER_IP_ADDRESS
COMMIT
# Completed on Tue Oct  9 09:59:04 2018

Help me please.
(Support for this Provo is only at the level of iron, when the piece of iron works, they do not help in any way)

Answer 1

Set up according to the normal guide with a description of all the actions performed.
Do you have it written in the rule - THIS_SERVER_IP_ADDRESS?