Setting up a home lab- need NAT to have internal virtual switch to go into the internet

  • LAYER 8 Netgate

    With a simple DHCP WAN and LAN, Automatic Outbound NAT pretty much "just works."

    You likely do not need to reinstall. Just save the configuration and reset to factory. You can easily restore the saved config and be right back where you are now.

    Tip for a Virtual Lab:

    The first thing I usually do after I install a new VM firewall is drop to the shell and run this:

    pfSsh.php playback enableallowallwan

    You can then just use your workstation to connect to the web gui on WAN (the address is right there above the console menu) so you don't have to connect using a VM. You would, of course want to disable (or source limit) that rule to test WAN firewall functionality.

    ETA: DISCLAIMER this is not something you want to do with anything actually on the wild internet.

  • @johnpoz Just did a factory reset, update to the latest version of pfsense.

    Did you mess with the lan rules? This no longer matter I reset it to factory default.

    Did you mess with the outbound nat tab? factory default.

    Your setup is out of the box, click click works.

    Are you running any packages? No packages with logging facilities are currently installed.

    Does pfsense have internet access? •Unable to retrieve package information. It does not have internet.......

  • LAYER 8 Netgate

    If you have no internet from the node itself, nodes behind it won't have internet either.

  • @derelict yes.... but why doesn't it have internet? If I use the same external network adapter in a windows 10 vm it has access to the internet.........i'm accessing the web gui via the LAN address which is /24.... not from the 192.168.1.x interface. It's updated to version i don't get it...... how does it not have internet but able to download and update? LOL

    The process will require 24 MiB more space.
    [1/1] Upgrading pfSense-kernel-pfSense from 2.4.2 to 2.4.4_2...
    [1/1] Extracting pfSense-kernel-pfSense-2.4.4_2: .......... done
    ===> Keeping a copy of current kernel in /boot/kernel.old

    Removing unnecessary packages... done.
    Upgrade is complete. Rebooting in 10 seconds.

    nvm it has internet...i got the package list after the update

  • LAYER 8 Global Moderator

    ok so if it has internet - then you clients behind it would have internet.

  • @johnpoz clients behind it doesn't have internet.... Any ideas?

  • LAYER 8 Global Moderator

    Can clients ping pfsense IP? Is this what is set for their gateway?

    Lets see a traceroute to for example

    First hop should be pfsense IP on your VM lan you setup. Do I really have to fire up hyper-v to show you how simple this is?

  • @johnpoz

    can ping (LAN interface), (WAN interface) fine no problem with no loss
    can not ping which used to be the ASA FW, which I am now putting in a normal Netgear Nighthawk hoping it wasn't the firewall.

    After doing a tracert looks like it don't know what to do with the traffic from This is what I get:


    Tracing route to over a maximum of 30 hops

    1 2 ms 9 ms 4 ms
    2 2 ms 9 ms 9 ms
    3 6 ms 8 ms 6 ms
    4 4 ms 9 ms 7 ms
    5 * * * Request timed out.
    6 * * * Request timed out.
    7 * * * Request timed out.
    8 * * * Request timed out.
    9 * * * Request timed out.
    10 *

    I would like to note a couple things though before I leave for work:

    pfsense has the following set:
    DNS server(s)
    Version 2.4.4-RELEASE-p2 (amd64)
    built on Wed Dec 12 07:40:18 EST 2018
    FreeBSD 11.2-RELEASE-p6

    LAN Interface Config
    Static IPv4 Configuration

    NAT > Outbound Rules
    Automatic Rules:
    Interface Source Source Port Destination Destination Port NAT Address NAT Port Static Port Description
    WAN ::1/128 * * 500 WAN address * Auto created rule for ISAKMP
    WAN ::1/128 * * * WAN address * Auto created rule
    LAN ::1/128 * * 500 LAN address * Auto created rule for ISAKMP
    LAN ::1/128 * * * LAN address * Auto created rule

    WAN Rules
    0 /270 KiB

    • RFC 1918 networks * * * * * Block private networks
      0 /22 KiB
    • Reserved
      Not assigned by IANA * * * * * Block bogon networks

    LAN Rules
    Rules (Drag to Change Order)
    States Protocol Source Port Destination Port Gateway Queue Schedule Description Actions
    1 /16.65 MiB

        • LAN Address 443
          80 * * Anti-Lockout Rule
          5 /892 KiB
          IPv4 * LAN net * * * * none Default allow LAN to any rule
          0 /0 B
          IPv6 * LAN net * * * * none Default allow LAN IPv6 to any rule

    WAN_DHCP (default) WAN Interface WAN_DHCP Gateway
    GW_LAN LAN Interface lan Gateway

    also want to mention I realized Hyper V created this weird Default Switch which is greyed out it state the Default network switch automatically gives virtual machines access to the computer's network using NAT. Any idea if I should be doing this for anything? When I look at it from the host it has a network.

  • LAYER 8 Global Moderator

    And you did a clean install of pfsense with a wan and lan switch in hyper-v?

    Here this is how freaking drop dead simple this is..

    Created my wan external switch, connected to nic on my host machine.
    Created an internal vswitch (only for vms)

    Did a pfsense vm, 2 nic 1 on wan switch, other on lan switch. even set my lan IP to be the same as yours

    Fired up test vm on the internal switch.. It got IP from pfsense dhcp, can access the gui, internet.. If it takes you more than 5 minutes to set this all up you have something wrong..

    You can see pfsense sees there is update available - so it can get to the internet.. client can get to the internet through pfsense.. See the traceroute.


  • LAYER 8 Global Moderator

    @korr2221 said in Setting up a home lab- need NAT to have internal virtual switch to go into the internet:

    LAN ::1/128 * * 500 LAN address * Auto created rule for ISAKMP
    LAN ::1/128 * * * LAN address * Auto created rule

    That is Never going to work!!! Where is your local network? 10.0.0/24

    Here is mine just setup


    You got something broke if its not creating the automatic NAT for your lan network.

    You set a GATEWAY on your LAN interface didn't you to what its OWN address... Pfsense clearly NOT to do that!!!!

    GW_LAN LAN Interface lan Gateway

    How could you think that would work???


    I just went through the wizard again... It doesn't even give you a option to set the gateway on the LAN... You have to go OUT OF YOUR WAY to do that... And then NOT read the info that clearly says NOT to set a gateway if its the local network and not your wan..


  • @johnpoz Bro it must be my pfsense image. lol..... I did not configure THAT! I set everything back to default.

  • LAYER 8 Global Moderator

    Sorry but NO its not the pfsense image..... Out of the box the IP Lan for pfsense is with NO GATEWAY.. For it to be 10.x.x.x you had to have changed it... It sure and the F would not have set a gateway to itself.. It just wouldn't!!! Its NOT possible.. You saw my setup, I just ran through it in like 5 minutes... The longest part was downloading the quick VM for ubuntu in hyper-v ;)

    Did you download this image of pfsense from somewhere other then pfsense/netgate? Is it some hyper-v image you got from somewhere?

  • @johnpoz i downloaded the image long ago and not from netgate lol.... i forgot where.... but now i'm starting to question myself.........but good find i knew something was weird i cna't wait to go home and get this working lol

  • LAYER 8 Global Moderator

    Huh? Dude grab the current ISO from netgate and install it and you will be up and running in 5 minutes.


  • @johnpoz yeah i dunno why i'm fighting with the old image. lol

  • @johnpoz UPDATE. Issue has been resolved. PHEW. I can't believe it.

  • LAYER 8 Netgate

    For posterity, do you know what the solution was?

  • @derelict johnpoz most likely got the solution right. on the LAN interface the ipv4 upstream gateway should've been none. but I got a fresh iso and did an update and had another fresh start with default configs and paid attention to make sure not to put anything in the upstream gateway. I was also able to figure out a number of other issues why the dc acted weird. it was all networking related. lol

  • LAYER 8 Global Moderator

    @korr2221 said in Setting up a home lab- need NAT to have internal virtual switch to go into the internet:

    paid attention to make sure not to put anything in the upstream gateway.

    It never even ASKS you for that in the gui wizard... And if you do it at the console it clearly states NONE for lan. You really have to go out of your way to mess it up like that! ;)

    How would the gateway be its own freaking IP... See this error quite a bit over the years - and it never makes any sense what someone was thinking when they do that..

    Glad you got it sorted - another one to chalk up to pebkac ;)

  • @johnpoz just for learning sake, if this was a cisco router, how would one set the NAT? anyone happen to know the command? is it

    configure terminal
    ip nat pool name start-ip end-ip {netmask netmask | prefix-length prefix-length }
    access-list access-list-number permit source [source-wildcard ]
    ip nat inside source list access-list-number pool name
    interface type number
    ip address ip-address mask
    ip nat inside
    interface type number
    ip address ip-address mask
    ip nat outside

Log in to reply