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socket error # 11001 host not found

General pfSense Questions
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  • Z
    Zs vendo
    last edited by Jun 5, 2023, 11:44 AM

    alt text

    After installing pfsense and opvn, I try to access remote company app after connecting with vpn but it is causing this error.
    DNS is not, ports is not, firewall seems not.
    On the other hand, this app is with Delphi and Firebird
    Does anyone know what it is?

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    • S
      stephenw10 Netgate Administrator
      last edited by Jun 6, 2023, 12:06 AM

      'Host not found' is not a useful error.

      What does that error number show as in the application docs?

      What is it trying to connect to? Does that resolve?

      Steve

      Z 1 Reply Last reply Jun 6, 2023, 1:25 AM Reply Quote 0
      • Z
        Zs vendo @stephenw10
        last edited by Jun 6, 2023, 1:25 AM

        @stephenw10 Connector yes, I have access to all files, but company software does not open

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        • S
          stephenw10 Netgate Administrator
          last edited by Jun 6, 2023, 11:17 AM

          I would guess it's trying to resolve some host by name and that doesn't work unless you're on the local network but we need more info to diagnose further.

          Z 1 Reply Last reply Jun 6, 2023, 12:20 PM Reply Quote 0
          • Z
            Zs vendo @stephenw10
            last edited by Jun 6, 2023, 12:20 PM

            @stephenw10 But when I close the opvn I'm on the local network, all the files open, but the app doesn't

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            • S
              stephenw10 Netgate Administrator
              last edited by Jun 6, 2023, 12:58 PM

              There's no way we can diagnose this without knowing what is actually failing.

              What is the application that's failing?

              What does error #11001 indicate in that application?

              @Zs-vendo said in socket error # 11001 host not found:

              when I close the opvn I'm on the local network, all the files open, but the app doesn't

              The application fails even when you're on the network directly?

              Steve

              Z 1 Reply Last reply Jun 6, 2023, 1:08 PM Reply Quote 0
              • Z
                Zs vendo @stephenw10
                last edited by Jun 6, 2023, 1:08 PM

                @stephenw10 a software made in delphi and firebird database

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                • S
                  stephenw10 Netgate Administrator
                  last edited by Jun 6, 2023, 1:15 PM

                  @stephenw10 said in socket error # 11001 host not found:

                  socket error # 11001

                  Ok so that appears to be a standard Windows error and it's probably a DNS failure like I suggested:

                  WSAHOST_NOT_FOUND
                  11001
                  Host not found.
                  No such host is known. The name is not an official host name or alias, or it cannot be found in the database(s) being queried. This error may also be returned for protocol and service queries, and means that the specified name could not be found in the relevant database.
                  

                  So what host is it trying to connect to?

                  It's probably trying to connect using a hostname that is only valid if you're on the remote network directly in the domain. You can add a domain override in pfSense so it points to the remote company DNS servers for hosts in that domain. If that is the issue.

                  Steve

                  Z 1 Reply Last reply Jun 6, 2023, 1:27 PM Reply Quote 0
                  • Z
                    Zs vendo @stephenw10
                    last edited by Jun 6, 2023, 1:27 PM

                    @stephenw10 I already did , I can even ping from my computer ping server.local or ping 192.168.1.2 this shows that the dns is resolved

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                    • S
                      stephenw10 Netgate Administrator
                      last edited by Jun 6, 2023, 1:45 PM

                      You shouldn't use .local as it's a specially reserved domain for mDNS. Or is that just an example here?

                      If you client is able to resolve the target host using the full FQDN (server.local) perhaps the application is trying to use the hostname only (server) and failing when .local is not it's own domain.

                      Z 2 Replies Last reply Jun 6, 2023, 1:59 PM Reply Quote 0
                      • Z
                        Zs vendo @stephenw10
                        last edited by Jun 6, 2023, 1:59 PM

                        @stephenw10 🔒 Log in to view

                        See full ping
                        before
                        ping server.company.local
                        after
                        ping 192.168.1.2

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                        • Z
                          Zs vendo @stephenw10
                          last edited by Jun 6, 2023, 2:03 PM

                          This post is deleted!
                          1 Reply Last reply Reply Quote 0
                          • S
                            stephenw10 Netgate Administrator
                            last edited by Jun 6, 2023, 2:46 PM

                            Ok, that looks good. And 53ms looks like it's not local so I assume it's going over the VPN.

                            However it will still fail if the application is trying to use just the hostname (server) instead of the full FQDN (server.company.local). Unless the local domain is company.local which it probably isn't.

                            It may not be DNS, something could be blocking the traffic. What do you have access to to solve this? Can you check the server side?

                            Otherwise try looking at the state table in pfSense and filter it by 192.168.1.2. Do you see states opening when you try to connect with the application?

                            Z 2 Replies Last reply Jun 6, 2023, 3:03 PM Reply Quote 0
                            • Z
                              Zs vendo @stephenw10
                              last edited by Jun 6, 2023, 3:03 PM

                              @stephenw10

                              on the server side I have access to everything, other applications, other software, all excel sheets, files...everything...

                              You speak in the certificate configuration?
                              🔒 Log in to view

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                              • Z
                                Zs vendo @stephenw10
                                last edited by Jun 6, 2023, 3:53 PM

                                @stephenw10 brother that's right, I certainly need to configure the open vpn client

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                                • S
                                  stephenw10 Netgate Administrator
                                  last edited by Jun 6, 2023, 5:36 PM

                                  I meant do you have access to the OpenVPN server or the application server to check for incoming connections?

                                  If you don't then check at the pfSense end for the expected states when you try to connect.

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