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    502 Bad Gateway (nginx) after Update to 2.3

    Scheduled Pinned Locked Moved Problems Installing or Upgrading pfSense Software
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    • luckman212L
      luckman212 LAYER 8
      last edited by

      I think the IPSec widget also causes this.  Not sure why that is.  Interesting info- not really a fix but it's a workaround.  Sadly, at least for me those 2 widgets are among the most useful ones to see at a glance.

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      • P
        phil.davis
        last edited by

        Make sure to retry all the widgets after upgrading to 2.3.1-RELEASE.
        Then this can move forward if there are more issues reported.
        The problems are related to the widgets doing updates every 10 seconds or so, asking the nginx server to do stuff. nginx gives the PHP to back-end PHP processes to do the work. If those things get delayed (or hung) too much then all the PHP processes get busy and nginx will have to give up.

        As the Greek philosopher Isosceles used to say, "There are 3 sides to every triangle."
        If I helped you, then help someone else - buy someone a gift from the INF catalog http://secure.inf.org/gifts/usd/

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        • C
          Christos
          last edited by

          Got the 502 Bad Gateway error with 2.3.1  :( :( :(

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          • G
            gordc
            last edited by

            Has anyone been able to figure out what is happening with this.  I get this every couple of days and the only resolution is to take the 20 minute walk to physically restart the firewall. 
            I can log in using ssh but the majority of the commands either give an error on execution or don't work.  When I log in I don't get a menu.  I start the menu with /etc/rc.initial
            After that if I use options 11 or 16 I get errors
            Restarting webConfigurator…Error: cannot open /var/etc/nginx-webConfigurator.conf in system_generate_nginx_config().

            Fatal error: Call to undefined function pfSense_interface_listget() in /etc/inc/interfaces.inc on line 80
            PHP ERROR: Type: 1, File: /etc/inc/interfaces.inc, Line: 80, Message: Call to undefined function pfSense_interface_listget()
            Fatal error: Call to undefined function gettext() in /etc/inc/rrd.inc on line 60
            PHP ERROR: Type: 1, File: /etc/inc/rrd.inc, Line: 60, Message: Call to undefined function gettext()

            Killing php-fpm
            pkill: signalling pid 737: Operation not permitted
            /etc/rc.php-fpm_restart: cannot create /tmp/php_errors.txt: Permission denied
            Found XMLRPC lock. Removing.
            rm: /tmp/xmlrpc.lock: Operation not permitted
            Starting php-fpm
            [ERROR] unable to bind listening socket for address '/var/run/php-fpm.socket': Address already in use (48)
            [ERROR] FPM initialization failed

            If I use option 5 to try to restart the system I get the prompt asking me to continue but the system does not reboot.

            I have also tried /etc/rc.initial.reboot
            Again I get the prompt asking to proceed but the system does not reboot.

            This is costing me too much time.

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            • jahonixJ
              jahonix
              last edited by

              Just upgrade to 2.3.1_1 which was released today.

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              • H
                Honest Bob
                last edited by

                I had the same issue even with 2.3.1-1. I dont have the openvpn widget open. I shut down the PFblockerNG and Snort widgets to see if they are the culprit. I am left with system information and interfaces.

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                • S
                  samham
                  last edited by

                  since upgrading from 2.2 to 2.3.1 I've been getting "502 Bad Gateway" error at least once a week which I correct by starting PHP-FPM, but this is getting very annoying especially because it causes some of my sessions to drop, does any one know of any permanent fix?

                  2.3.1-RELEASE-p1
                  IPsec
                  OPenVPN
                  PfBlockerNG

                  Capture.PNG_thumb
                  Capture.PNG

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                  • PerforadoP
                    Perforado Rebel Alliance
                    last edited by

                    Same here. Will try tomorrow without the ipsec widget for reference.

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                    • T
                      tweek
                      last edited by

                      I'm also seeing the 502 Bad Gateway error. I'm running 2.3.1-RELEASE-p1 (i386 nanobsd) as a direct update from v 2.2.6, hardware is a Soekris net6501. Installed packages are Network UPS Tools v2.3.0 and openvpn-client-export v1.3.8.

                      When it hangs up I log in via SSH and choose the 16) Restart PHP-FPM item from the text interface. As per others on this and other threads I have removed the IPsec widget from the dashboard to see if that helps.

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                      • H
                        hekmel
                        last edited by

                        I have received the 502 Bad Gateway error after upgrading to 2.3.1 Release.
                        I have the IPSec widget open. I will have to restart the firewall after working hours today, and disable the widget and see if that solves anything on our end.

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                        • G
                          gordc
                          last edited by

                          I am still getting this error even after upgrading to 2.3.1_1
                          It has happened a couple of times now.  I have also noticed that when it happens and I SSH in to the CLI I have to run sudo rc.initial to get the menu up.  (If I don't run sudo none of the commands will work).  I can then reset PHP and get access.

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                          • P
                            phil.davis
                            last edited by

                            @gordc:

                            I am still getting this error even after upgrading to 2.3.1_1
                            It has happened a couple of times now.  I have also noticed that when it happens and I SSH in to the CLI I have to run sudo rc.initial to get the menu up.  (If I don't run sudo none of the commands will work).  I can then reset PHP and get access.

                            If you SSH and login as an ordinary user (not root), then the menu is not displayed - that is normal. As you say, you have to sudo (to become root) and run the rc.initial script (the menu).

                            As the Greek philosopher Isosceles used to say, "There are 3 sides to every triangle."
                            If I helped you, then help someone else - buy someone a gift from the INF catalog http://secure.inf.org/gifts/usd/

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                            • G
                              gordc
                              last edited by

                              OK.  But how about the 502 error.  It was my understanding that 2.3.1_1 was supposed to fix that problem

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                              • P
                                phil.davis
                                last edited by

                                @gordc:

                                OK.  But how about the 502 error.  It was my understanding that 2.3.1_1 was supposed to fix that problem

                                I believe there are still possibly some cases where the IPsec widget is doing back-end requests, those hang (or take a long time) and make all the PHP processes busy.
                                If you have the IPsec widget enabled on the dashboard, then remove it. Report back if that stops the problem.

                                As the Greek philosopher Isosceles used to say, "There are 3 sides to every triangle."
                                If I helped you, then help someone else - buy someone a gift from the INF catalog http://secure.inf.org/gifts/usd/

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                                • H
                                  hekmel
                                  last edited by

                                  @hekmel:

                                  I have received the 502 Bad Gateway error after upgrading to 2.3.1 Release.
                                  I have the IPSec widget open. I will have to restart the firewall after working hours today, and disable the widget and see if that solves anything on our end.

                                  After restart I have disabled the IPsec widget and the error has stayed away. Lets hope it continues to stay away

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                                  • A
                                    aGeekhere
                                    last edited by

                                    Getting 500 error here
                                    https://help.comodo.com

                                    Never Fear, A Geek is Here!

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                                    • E
                                      edmund
                                      last edited by

                                      I haven't seen this error before today - here's the background.  My old NetGate Alix box died and I replaced it with a new box and installed 2.3.1-RELEASE-P5 with the WAN port connected to my office LAN, installed AutoConfigBackup and pulled the old config file off the server.  I setup the new interfaces and had no problems at all - there are no other packages installed, no VPN etc - it's a basic, single WAN firewall with a few custom rules and two separate LANs - I've been running on a 10 year old Alix so nothing fancy at all.  Everything went really smoothly - until I took it home and installed it.

                                      For some reason (probably a different MAC address) the firewall is not pulling a DHCP address from the to the COX cable modem - I was able to log in just fast enough to see that once, but otherwise - I'd guess 95% of the time - I get the 502 Bad Gateway (nginx) error message when I try to access the GUI via the LAN with the cable modem connected.  The error goes away if I reboot with the WAN disconnected, I can access the LAN interface if I disconnect the cable modem, so I wonder if the problem is related to something in the firewall seeing the WAN port "up" but not actually passing any data.

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                                      • P
                                        phil.davis
                                        last edited by

                                        @edmund Perhaps the cable modem is giving a (private) IP address/CIDR that matches/overlaps with the LAN subnet?

                                        Although I realize that if you are using an old config from the Alix that was working, that should not have been the case.

                                        As the Greek philosopher Isosceles used to say, "There are 3 sides to every triangle."
                                        If I helped you, then help someone else - buy someone a gift from the INF catalog http://secure.inf.org/gifts/usd/

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                                        • E
                                          edmund
                                          last edited by

                                          @phil.davis:

                                          @edmund Perhaps the cable modem is giving a (private) IP address/CIDR that matches/overlaps with the LAN subnet?

                                          Although I realize that if you are using an old config from the Alix that was working, that should not have been the case.

                                          My experience with cable modems has been that a DHCP request appears to cause them to serve the assigned IP address if the requesting device has a MAC address recognized by the modem.  That was they way that it appeared to be working previously with pfSense displaying the actually cable company IP address in the WAN status.

                                          I suspect that this is just a configuration issue - what I found interesting here is that I'm getting the 502 bad gateway error (to be expected since the WAN was not serving an address) and it's causing me to be locked out of pfSense until I disconnect the WAN.

                                          I think that my next step is to return the new box to the factory configuration and set it up again from scratch to ensure that there are no Alix specific switches in effect.

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                                          • E
                                            edmund
                                            last edited by

                                            I did a factory default reset and started the setup again.  Something seems to be very wrong with pfSense - I'm seeing an average CPU utilization of 25% with no traffic on a 4 core box with two cores running at 100% - see the attached picture.  The WAN gateway appears to be dropping up to 80% of the packets - yet switching from the pfSense box to a Linksys router gives my about 70M/10M on a speedtest - it's not the modem or connection that's causing the problem.

                                            With this new setup I've completely disabled IPv6 (at least as far as I can tell) and the 502/504 Bad Gateway messages have stopped although pfSense still shows the gateway as down on the widget.  Also unbound crashes a lot - you can see each CPU running it's own copy of unbound - is that normal?

                                            After four hours with no progress I think it's probably time to wipe the disk and start again from scratch.

                                            Capture.PNG
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