WAN Interface IP Different from Public IP.



  • Hello,

    My WAN interface is setup to get a public IP via DCHP from Comcast.  Today I noticed that my public IP is not matching the address shown int the dashboard for the WAN interface.    Shouldn't these match?

    My cable modem is a pure modem with no routing/wifi built in.  It is a Motorola Surfboard SB6121.

    Access to the internet works but my WAN IP does not match the public IP.    I am not sure how to troubleshoot this.  I did power down both the modem and the pfSense box, but this did not resolve the issue.

    Thank you,

    Jerold



  • I tried http://www.myipaddress.com/show-my-ip-address/ and it shows my public IP does match pfsense, so it seems like ipchicken.com is just wrong and my pfsense setup is just fine.



  • Perhaps a caching issue in your browser and/or your PC?

    You could always try checkmyip.com for a third opinion, but it's much more likely to be a caching hiccup (what's ipchicken say now?).



  • IPChicken.com appears to be down.  Maybe it was their issue.



  • Perhaps something in your ISP?
    ipchicken.com works fine for me in Pacific NorthWest (or Pacific SouthWest - Canada :)  )

    You don't happen to have Snort/Suricata/Squid involved in this mix do you?


  • LAYER 8 Global Moderator

    your browser using a proxy be it intentional or a hijack, you have a vpn setup on client or pfsense..

    Unless you are using something to send your traffic elsewhere be it vpn or proxy.. Your public IP that pfsense gets on its wan would be the public IP you should see when going to these IP checkers online.



  • Sounds like your ISP has you on an internal network, I get the same thing from my ISP. Call your ISP and ask them if that's the case.

    I had to request a static public IP to solve my issue (double NAT). My WAN is still a private IP but I at least I have control of my network now.



  • @jpvonhemel:

    My WAN interface is setup to get a public IP via DCHP from Comcast.

    You cannot setup it to get a public IP, sorry. What you have now is probably 'a dynamic IP via DCHP'.
    What is your current WAN IP exactly? Feel free to mask 2 last octets.



  • @AndrewZ:

    You cannot setup it to get a public IP, sorry. What you have now is probably 'a dynamic IP via DCHP'.

    Whether an IP is dynamic or static doesn't influence whether it's public. On Comcast, he's getting a public IP via DHCP.

    Sounds like it was just a temporary problem of some sort with one site. https://pfsense.org/ip.php and https://forum.pfsense.org/ip.php are two more you can use to check your IP. Those don't cache anything, what it displays is definitely the IP your request is coming from.



  • @cmb:

    Whether an IP is dynamic or static doesn't influence whether it's public.

    Exactly. Fully agree.
    What I'm trying to say that the customer will get whatever IP assigned by the ISP.
    There is no (to my knowledge) configuration option in pfSense 'to get a public IP', that's an ISP's decision.

    Sorry, I missed that OP was able to see the right IP on another site.



  • Squid could be the culprit


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