OpenVPN Support Forum

Posted: **Sun Aug 21, 2022 7:20 am**

Hello,

I want to connect two networks to give to the remote network (192.168.1.0) a public IP and the networks to be accessible in any direction between.
The system is working, I can access from client side(192.168.1.0) all the devices on 192.168.0.0, but vice versa not. This is what I want to sort out if you can help.

The server device is a qnap NAS, TS-251D. Openvpn is set up via QVPN app.
The client device is an Openwrt router with no public ip.

Server.conf from qnap is this:

Code: Select all

cd /etc/openvpn
dev tun
keepalive 10 60
reneg-sec 0
persist-key
persist-tun
duplicate-cn
script-security 3
client-to-client
management localhost 7505
#username-as-common-name
client-cert-not-required
auth-user-pass-verify /usr/sbin/qvpn.sauth via-env
multihome

ca /etc/openvpn/keys/ca.crt
dh /etc/openvpn/keys/dh1024.pem
key /etc/openvpn/keys/myserver.key
cert /etc/openvpn/keys/myserver.crt

client-connect /etc/openvpn/connect.sh
client-disconnect /etc/openvpn/disconnect.sh

status /var/log/openvpn-status.log
writepid /var/run/openvpn.server.pid

port 1194
proto udp
max-clients 5
server 10.8.0.0 255.255.255.0

push "dhcp-option DNS 8.8.8.8"
push "redirect-gateway def1"

cipher AES-256-CBC
tls-cipher TLS-ECDHE-RSA-WITH-......this is tha last line

The routing table on server:

Code: Select all

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         dlinkrouter     0.0.0.0         UG    100    0        0 br0
10.0.3.0        *               255.255.255.0   U     0      0        0 lxcbr0
10.0.5.0        *               255.255.255.0   U     0      0        0 docker0
10.0.7.0        *               255.255.255.0   U     0      0        0 lxdbr0
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
127.0.0.0       *               255.0.0.0       U     0      0        0 lo
192.168.0.0     *               255.255.255.0   U     0      0        0 br0
253.253.253.0   *               255.255.255.0   U     0      0        0 vethgw01

Also I attach a schema and the vpn setup from qnap server.

I have tried to add routes but I am missing something.

Thank you!

Topology and qvpn setup screenshot here:
https://postimg.cc/cK4krQwK
https://postimg.cc/3khcHMwF

Posted: **Thu Aug 25, 2022 5:48 pm**

I have solved it, here is the solution
Title:
" Including multiple machines on the client side when using a routed VPN (dev tun)"
from here: https://openvpn.net/community-resources ... er-subnet/

in order to edit the server.conf you need to edit here: /etc/init.d/vpn_openvpn.sh
because qnap's QVPN this overwrites server.conf when you restart service to apply changes.

OpenVPN Support Forum

Bidirection VPN tunnel between two networks can not setup properly

Bidirection VPN tunnel between two networks can not setup properly

Re: Bidirection VPN tunnel between two networks can not setup properly