Cannot access PfSense GUI

  • I have something strange happening and I am at my whits end.  I have installed PfSense on Xenserver and everything works swimmingly.  I have a pretty bog standard setup with the LAN assigning IP addresses and the gateway set at  Everything works.  I can ping the gateway, the VM works fine, the internet works fine.  The only thing I cannot do is type into the web browser on my desktop.  It simply times out.  The wierdest thing is that from another computer on the same network the GUI is accessible with no problem.  What could I possibly have done to the setup of my Windows 7 PC to prevent it from accessing the address.  By the way, it is exclusively  If I change the gateway address to something else, I can get to the GUI from this PC.  Thanks in advance for the help.

  • Some duplicate address in your part of the subnet/switches or even your Windows7 is set to

    arp -a

    and see what MAC address your Windows7 thinks is compared to another client that is OK.

  • Great suggestion.  I did it and the MAC address on 2 different windows 7 machines for are the same.  It works on the other one and not this one.  I only have one on this machine, the problem one.

  • Banned


    I only have one on this machine, the problem one.

    Huh? ??? ??? ???

    Do yourself a big favour and avoid setting your firewall IPs to an IP used on half of the equipment out there by default:

  • LAYER 8 Global Moderator

    ^ exactly!!!  All of my local side interfaces on pfsense all end in .253 because .1 and .254 are very very common device IPs.  I moved away from the 192.168.0 and 192.168.1 segments a while back..  But continue to use .253 out of habit.

    So your windows PC that can not get to the pfsense gui IP address is  Please post an ipconfig /all output from your problem machine..

    You do understand your PC can not have the same IP as pfsense right??  They both can not be ;)  You say it works when you change the pfsense IP.. So it seem to point to you have the same IP on your pc and pfsense and then not understanding why your pc can not talk to pfsense..  Which unless your like high as a kite seems just flabbergasting ROFL!!

  • Netgate Administrator

    It reads to me like he ran arp- a on the client that cannot reach the pfSense webgui as Phil suggested and saw one MAC using the address, as expected. Then to check it wasn't some random MAC checked it on another client and it was the same.
    The only thing left is to check that's actually the correct MAC for the pfSense LAN interface. He may already have done that.

    However, yes, changing to use a different subnet on the LAN is often a good idea. It will rule out some local IP blocking issue at least.


  • Thanks for the responses guys.  I will follow your advice and make the change from the .1 address.  I am definitely a NOOB at all this stuff but thankfully I am not such a dope to not know that my Windows PC can be configured on  My windows PC is  StephenW10's hypothesis was correct.  I checked the MAC address on my problem PC and another PC with arp -a and they are the same.  I also confirmed that it is the same MAC address listed within Xencenter for the PfSense VM.

    The only reason I haven't changed the LAN IP address as yet is that I have a lot of devices in the network and I didn't want to change the default gateway for all of them.

    I would post an ipconfig /all but it is a absolute mess because I have a VPN adapter and a Virtual Box adapter included in it.  I also realize that this probably has something to do with my issues.

    Anyway, thanks for the discussion.  I am really enjoying learning about all of this and I realize dealing with dopes like me is not often enjoyable.

  • Netgate Administrator

    No problem. That's what the forum is for.  :)
    When you try to connect from the blocked client do you see blocked traffic in the firewall log in Status > System Logs, Firewall tab? Obviously you'd have to use a different client to check.
    It seems very likely it's a local block at the client. Have you tried multiple browsers?


  • OK, so this is really weird.  It works on IE, which I never use, but not on chrome or firefox.  How can this be?

  • Do a ctrl-F5 or whatever in Firefox to make it completely reload the whole pfSense webGUI. Maybe if there is nothing old cached then it will be happy.

  • OK, so this is really weird.  It works on IE, which I never use, but not on chrome or firefox.  How can this be?

    In the MS IE mostly nothing comes pre-installed and you will only to accept and allow something comes java based
    as this would be normal in this days pointed to the java security.

    But, the other browsers comes often or will be often later sorted with script and adware blockers and there for
    it could be that you will be getting in trouble then, not only on a pfSense box, as I see it right!

    For sure let the Ccleaner running once before you will reconnect to the pfSense box makes in some rarely
    cases also sense. So that nothing from earlier connects will be stored in the cache or elsewhere that can
    corrupt the login process.

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