OpenVPN: IPv6 routed 2 LAN
Topology
LAN 1 ---------- HOST A ---------------- HOST B -------------- LAN 2
ovpn server ovpn client
2002::/64 2345::1/64 2345::2/64 2003::/64
HOST A OpenVPN Server
OS : Ubuntu 18.04 IP : 192.168.0.239/24 IP : 2345::1/64 LAN1 : 2002::/64
HOST B OpenVPN Client
OS : Ubuntu 18.04 IP : 2345::2/64 LAN2 : 2003::/64
Konfigurasi Server
echo 1 > /proc/sys/net/ipv4/conf/all/forwarding echo 1 > /proc/sys/net/ipv4/conf/default/forwarding echo 1 > /proc/sys/net/ipv4/conf/tun0/forwarding echo 1 > /proc/sys/net/ipv4/conf/enp0s3/forwarding echo 1 > /proc/sys/net/ipv4/conf/enp0s8/forwarding
ifconfig enp0s3 192.168.0.239 netmask 255.255.255.0 ifconfig enp0s8 10.10.10.1 netmask 255.255.255.0 ip addr add 2002::1/64 dev enp0s8
Tambahan di konfigurasi /etc/openvpn/server.conf
ifconfig 10.8.0.1 255.255.255.0 server 10.8.0.0 255.255.255.0 server-ipv6 2345::1/64 route-ipv6 2003::/64 2345::2 # routing ke arah LAN client client-config-dir client
Tambahan di /etc/openvpn/client
File: client # tergantung username client.ovpn ifconfig-push 10.8.0.2 255.255.255.0 # paksa IP static di client untuk memudahkan routing push "route 10.10.10.0 255.255.255.0" # paksa routing ke upstream iroute 10.10.20.0 255.255.255.0 # internal routing ke arah client
tun-ipv6 push tun-ipv6 ifconfig-ipv6 2345::1 2345::2 push "route-ipv6 2002::/64" push "route-ipv6 2000::/3"
Konfigurasi Client Gateway
echo 1 > /proc/sys/net/ipv4/conf/all/forwarding echo 1 > /proc/sys/net/ipv4/conf/default/forwarding echo 1 > /proc/sys/net/ipv4/conf/tun0/forwarding echo 1 > /proc/sys/net/ipv4/conf/enp0s3/forwarding echo 1 > /proc/sys/net/ipv4/conf/enp0s8/forwarding
ifconfig enp0s3 192.168.0.237 netmask 255.255.255.0 ifconfig enp0s8 10.10.20.1 netmask 255.255.255.0
ip addr add 2003::1/64 dev enp0s8
TIDAK ADA Tambahan konfigurasi di client.ovpn. Pastikan setup interface BENAR. Pastikan setup routing BENAR.
ip route show ip -6 route show route -n