How do I set up this?

Hybelkanin1

Hi!
I am Norwegian, so sorry my poor English.

1: My ISP only gives me 4 public IPs. I can not get static IPs.
2: I have pfsense router. It routes 10.0.0.15 - 10.0.0.254 currently.
3: I have debian box in Netherlands. It have 4 public static IPs (xxx.xxx.xxx.105, xxx.xxx.xxx.111, xxx.xxx.xxx.118, xxx.xxx.xxx.138)
4: I have OpenVPN server at the debian box. I use shared key.
5: I want to get pfSense to connect to the OpenVPN server and give LAN-device with IP 10.0.0.22 the public IP xxx.xxx.xxx.118 or .138.

But I don't know how to set this up.
I think I have successfully connected the pfSense box to the Debian box, but I don't know about it really works or not. The status says it's UP, and it have IP and gateway. (With shared key)

I have tried:

NAT 1:1, interface OpenVPN, assigned xxx.xxx.xxx.138 to 10.0.0.22. I dont think it worked.
Virtual IP (WAN interface, xxx.xxx.xxx.138). I dont think it worked.

DEBIAN-BOX IN NETHERLANDS, /etc/network/interfaces
I have censored the IP (Because this is a public forum), and commented eth0:0, eth0:1 and eth0:3 (Because I think I have to free the IPs?)


auto eth0
iface eth0 inet static
    address xxx.xxx.xxx.105
    gateway xxx.xxx.xxx.1
    netmask 255.255.255.0
iface eth0 inet6 static
    up echo 0 > /proc/sys/net/ipv6/conf/all/autoconf
    up echo 0 > /proc/sys/net/ipv6/conf/default/autoconf
    netmask 64
    gateway xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    address xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    up ifconfig eth0 add xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    up ifconfig eth0 add xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    up ifconfig eth0 add xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
#auto eth0:0
#iface eth0:0 inet static
#    address xxx.xxx.xxx.111
#    gateway xxx.xxx.xxx.1
#    netmask 255.255.255.0
#auto eth0:1
#iface eth0:1 inet static
#    address xxx.xxxx.xxx.118
#    gateway xxx.xxx.xxx.1
#    netmask 255.255.255.0
#auto eth0:2
#iface eth0:2 inet static
#    address xxx.xxx.xxx.138
#    gateway xxx.xxx.xxx.1
#    netmask 255.255.255.0
auto lo
iface lo inet loopback

DEBIAN-BOX IN NETHERLANDS, /etc/openvpn/server.conf


dev tun
proto udp
ifconfig xxx.xxx.xxx.105 255.255.255.0

#optional: runs /etc/openvpn/add_routes.sh when the connection is established]
#up ./add_routes.sh

secret /etc/openvpn/mykey
port 1197
user nobody
group nogroup
comp-lzo
ping 15
ping-restart 45
ping-timer-rem
persist-tun
persist-key
verb 3

DEBIAN-BOX IN NETHERLANDS, /etc/openvpn/tun0.conf


dev tun0
ifconfig xxx.xxx.xxx.105 xxx.xxx.xxx.111 ##Why do I have to insert two IPs here?...
#secret /etc/openvpn/static.key
cipher AES-128-CBC
secret /etc/openvpn/mykey

So…
What to do with the pfSense box? :)