router on 192.168.2.254
openvpn pi on 192.168.2.43 wlan0, no eth0 connected
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cat test.ovpn
client
dev tun
proto udp
remote my.external.ip 2345
resolv-retry infinite
nobind
persist-key
persist-tun
mute-replay-warnings
ns-cert-type server
key-direction 1
cipher AES-128-CBC
comp-lzo
verb 5
mute 20
<ca>
-----BEGIN CERTIFICATE-----
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sudo cat /etc/openvpn/server.conf
local 192.168.2.43 # SWAP THIS NUMBER WITH YOUR RASPBERRY PI IP ADDRESS
dev tun
proto udp #Some people prefer to use tcp. Don't change it if you don't know.
port 2345
ca /etc/openvpn/easy-rsa/keys/ca.crt
cert /etc/openvpn/easy-rsa/keys/amsterpi.crt # SWAP WITH YOUR CRT NAME
key /etc/openvpn/easy-rsa/keys/amsterpi.key # SWAP WITH YOUR KEY NAME
dh /etc/openvpn/easy-rsa/keys/dh2048.pem # If you changed to 2048, change that here!
server 10.8.0.0 255.255.255.0
# server and remote endpoints
ifconfig 10.8.0.1 10.8.0.2
# Add route to Client routing table for the OpenVPN Server
push "route 10.8.0.1 255.255.255.255"
# Add route to Client routing table for the OpenVPN Subnet
push "route 10.8.0.0 255.255.255.0"
# your local subnet
push "route 192.168.2.0 255.255.255.0" # SWAP THE IP NUMBER WITH YOUR RASPBERRY PI IP ADDRESS
# Set primary domain name server address to the SOHO Router
# If your router does not do DNS, you can use Google DNS 8.8.8.8
push "dhcp-option DNS 192.168.2.254" # This should already match your router address and not need to be changed.
# Override the Client default gateway by using 0.0.0.0/1 and
# 128.0.0.0/1 rather than 0.0.0.0/0. This has the benefit of
# overriding but not wiping out the original default gateway.
push "redirect-gateway local def1"
client-to-client
duplicate-cn
keepalive 10 120
tls-auth /etc/openvpn/easy-rsa/keys/ta.key 0
cipher AES-128-CBC
comp-lzo
user nobody
group nogroup
persist-key
persist-tun
status /var/log/openvpn-status.log 20
log /var/log/openvpn.log
verb 5
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sudo cat /etc/firewall-openvpn-rules.sh
#!/bin/sh
iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o wlan0 -j SNAT --to-source 192.168.2.43
iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o wlan0 -j MASQUERADE