Pfsense only OpenVPN Server with only single interface WAN

  • I'm not familiar with Google cloud. Is there a virtual environment with an internet gateway, where you're able to add virtual network interfaces and internal networks?

    If that is not possible take another solution.

  • I have only network card on my pfsense VM with google cloud.

    Google cloud NAT public IP directly on private IP.

    Can access to PFSENSE WEB with public IP and WAN IP in console is private IP

    I install PFSENSE with this guide …

    for other method can you explain more please ?

  • The crux of the matter is the gateway here for this solution. If you cannot configure it, that won't work.

    So let's try the NAT solution.
    That is assuming that all settings are like you wrote in your first post here.
    For this one you have to enable the Outbound NAT in the pfSense web-GUI. Firewall > NAT > Outbound. Select the hybrid mode and save that.
    Add a new rule:
    Interface: WAN
    Source: any
    Destination: 10.142.xx.xx/20 (the Google Cloud local network)
    Translation address: Interface address

    That should work if the vpn is configured correctly.

  • Thx it's work now ! :-)

  • Hello,
    I'm new with pfsense, and for now I need it only because OpenVPN.

    I installed it to some cloud, also only with one interface for wan.
    Because there is no possibility on that hosting to put few servers in the same vlan, I wan't to try with OpenVPN.

    Is it possible only with bridging? I googled so much these days, and found only this 6 years old guide
    but it seems like it is obsolete.
    Also in netgate documentation there is this link
    which also not works because it is "irrelevant" for current pfsense version.

    Can you direct me how to make possible to put different cloud standalone servers to the same vlan?

  • There should exist smaller solutions for OpenVPN only.

    You can get access by a transit network and routing if you have access to the default gateway, as already mentioned here. Or by adding a route to each remote device you want to reach or by NAT.

    Also by bridging, in theory, but my experience tells me, that you will not get much support here for bridged openVPN, but you may try a new thread.
    I can't help.

  • @majinb_igor

    Hi I am trying to do the same thing, could you share a screenshot of younnat config for this?


  • Hello, I succeeded to setup on cloud with one WAN openvpn and connect devices from different places to one network.

    ISP is Hetzner.

    This is the configuration if someone need. Mostly done via Wizards, with small corrections afterwards.
    Still need a little bit to harden firewall.


    1_1533718050734_02-OpenVPN server.PNG

    2_1533718050734_03-Server - General Information.PNG

    3_1533718050734_04-Server Tunnel Settings.PNG

    4_1533718050734_05-Server - Crypto Settings.PNG

    5_1533718050735_06-Server - Client settings.PNG

    6_1533718050735_07-Interface Assignments.PNG

    7_1533718050735_08-Firewall WAN.PNG

    8_1533718050735_09-Firewall OpenVPN.PNG


    10_1533718050736_11-Connected clients.PNG

  • Hello again ! :-)

    I'm setup PFSENSE (1 WAN nic) on google cloud with 6 pfsense (client) connected site-to-site, all client can PING my google cloud network 10.142.x.x/20

    But when connect to my server on my google cloud 10.142.x.4 i'm can't PING my local network client ….

    If i'm connect on pfsense GUI (server-side) 10.142.x.7 and make PING test on my internal local client it's WORK !!!!

    pfsense server
    google cloud server

    pfsense client
    Workstation client

    ping from to ---- WORK
    ping from to ---- WORK

    ping from to ----- WORK
    ping from to ----- FAIL

    Traffic fail on one side … can you help me whit my route table please….

    THX !!!!

  • @n1tr0666 said in Pfsense only OpenVPN Server with only single interface WAN:

    I'm setup PFSENSE (1 WAN nic) on google cloud with 6 pfsense (client) connected site-to-site

    6 site-to-site clients are connected to a single server? With CSO?

    @n1tr0666 said in Pfsense only OpenVPN Server with only single interface WAN:

    ping from to ----- FAIL

    You have to tell the cloud server where to go to reach Add a static route to it for the network of and direct it to pfSense

  • Hello,

    All client can ping 10.142.0.x but FAIL from other side ….

    When ping from (Windows 2016) to any pfsense client it's fail :-(

    If i'm log in pfsense server GUI and test ping to it's only work with OPENVPN interface if I choose WAN it's fail….

    See images in this link for more informations …..

    Where add static route in pfsense server or directly in google cloud interface ???

    Because my Windows 2016 server VM on google ( ogtain DHCP automatic and use for Gateway. Can add route directly in my Windows 2016 ? do you have demo route for me ?


  • @n1tr0666 said in Pfsense only OpenVPN Server with only single interface WAN:

    If i'm log in pfsense server GUI and test ping to it's only work with OPENVPN interface if I choose WAN it's fail….

    Seems that the client is missing the route to your google cloud network.

  • What do you means ?

  • On the client you have to set the route to the 10.142.xx.xx/20 network.
    In pfSense GUI enter the network into the "Remote network/s" box.

  • on the client ?

    client can ping google cloud VM


    google cloud VM cannot ping client

  • Again the question:
    All 6 site-to-site clients are connected to a single server? If yes, have you added CSO?

  • Yes all 6 pfsense client is connected to same pfsense server (

    CSO ?

  • You find it in the GUI: VPN > OpenVPN > Client specific overrides
    It's necessary to tell the server into which tunnel the packets have to be routed.

    CSO only work in conjunction with TLS Auth (a unique certificate for each client).

  • Yes ! already setup it !!!!

    My error it's maybe that my Windows 2016 server have Gateway but my pfsense server is

    In my Windows 2016 … if add static route like the server ignore this rules ….

    route add mask

    and cannot find option in google cloud for it and if i'm configure static ip on my google cloud VM (Windows server) I cannot reach vm after, only work in DHCP.

  • server1.conf.txt Even though this post is 2 years old, I thought should reply to it as is still relevant today and helped me fix the same problem I had in 2020.

    As like the original post, I too couldn't access any local network resources while my pfSense is set up in a local XCP-ng VM using only one WAN port. I was able to access the internet and local pfSense IP but couldn't ping any other LAN IP/resources. Oddly, the local Xen Orchestra website loaded without any images, only the login page with just text but couldn't access all the other local resources, NAS, Plex server, local servers, etc.

    Thanks to viragomann advice on setting up the Firewall NAT Outbound rule, everything works. I was able to access all LAN resources from my work!!

    My router IP is so I setup the NAT Outbound rule as followed:
    Interface: WAN
    Source: Any
    Destination: Network
    Screenshot 2020-10-11 112553.png

    I haven't set up the Dynamic DNS through pfSense as it was set up through my home router.

    ALSO, DON'T FORGET TO SET UP PORT FORWARDING to port 1194 through the home router, otherwise, you won't be able to access the VPN server.

    I followed this instruction to set up the VM:

    I followed this video to set up pfSense on local XCP-ng VM:
    Youtube Video

    I followed these videos to set up the OpenVPN on pfSense:
    Youtube Video

    [0_1602430059510_server1.conf](Uploading 100%)

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