OPENVPN SITE TO SITE PSK

Layout

-192.168.33.1/24 -|garlic|-10.82.1.211---------------------10.82.1.195-|hubsi|-192.168.55.1/24

Interfaces

Dummy, pseudo Interface

garlic

auto ens18
iface ens18 inet static
 address 10.82.1.211
 netmask 255.255.0.0
 gateway 10.82.0.1

auto dummy0
iface dummy0 inet static
 address 192.168.33.1
 netmask 255.255.255.0
 pre-up ip link add dummy0 type dummy

hubsi

auto ens18
iface ens18 inet static
 address 10.82.1.195
 netmask 255.255.0.0
 gateway 10.82.0.1

auto dummy0
iface dummy0 inet static
 address 192.168.55.1
 netmask 255.255.255.0
 pre-up ip link add dummy0 type dummy

Ipfordward on

• cat /etc/sysctl.conf

net.ipv4.ip_forward=1

• sysctl -p

Openvpn

Install

• sudo apt-get install openvpn

Generatre PSK on garlic

• cd /etc/openvpn/
• openvpn --genkey secret static.key

Copy to hubsi

• scp static.key hubsi:$PWD

Openvpn config on garlic

• vi /etc/openvpn/server.conf

remote 10.82.1.195
dev tun
ifconfig 172.30.30.1 172.30.30.2
secret static.key
route 192.168.55.0 255.255.255.0
keepalive 10 120

Openvpn config on hubsi

• vi /etc/openvpn/client.conf

remote 10.82.1.211
dev tun
ifconfig 172.30.30.2 172.30.30.1
secret static.key
route 192.168.33.0 255.255.255.0
keepalive 10 120

Start and Autostart on all sites

• echo 'AUTOSTART="all"' >> /etc/default/openvpn
• systemctl daemon-reload
• systemctl start openvpn
• systemctl enable openvpn