OpenVPN with Public IP Assignments

OpenVPN with Public IP Assignments

VPN Server IP 
                a.b.c.99

VPN Subnet IP
                a.b.c.104 ~ a.b.c.107 (255.255.255.252)

VPN Server tun IP(a.b.c.105)
                a.b.c.105

Client tun IP   (a.b.c.106)
                a.b.c.106

Route:
                Use VPN server as default route

 


Server (a.b.c.99)
#Create conf

vi /etc/openvpn

# VPN server tun IP and VPN subnet netmask (size)
ifconfig a.b.c.105 255.255.255.252

# Some common settings
port 1194
proto tcp-server
mode server
tls-server
dev tun
ca ca.crt
cert server.crt
key server.key
dh dh2048.pem
keepalive 10 120
comp-lzo

# VPN IP pool
ifconfig-pool a.b.c.106 a.b.c.107
# Use VPN server tun IP as gateway for VPN subnet
push "route-gateway a.b.c.105"
# vpn server use tun as route dev for vpn subnet
topology subnet
# vpn client use tun as route devo for vpn subnet
push "topology subnet"
#  Use VPN server as default gateway
push "redirect-gateway def1 bypass-dhcp"
# Make VPN client user use 8.8.8.8 as defualt DNS
push "dhcp-option DNS 8.8.8.8"
#Enable Client to client traffic
client-to-client

#Enable forward

iptables -I FORWARD -j ACCEPT