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    FTP Client problem

    Scheduled Pinned Locked Moved General pfSense Questions
    ftp client
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    • johnpozJ
      johnpoz LAYER 8 Global Moderator
      last edited by johnpoz

      Again the ftp client (ftp.exe) in windows only supports ACTIVE... If you want to use active on clients behind pfsense then you need to install that package..

      If your clients use passive then no you do not need the package... Understanding how ftp works is step 1 ;)
      http://slacksite.com/other/ftp.html
      Active FTP vs. Passive FTP, a Definitive Explanation

      That your still using ftp at all would be the question I would be asking yourself... It should of died off 10 years ago... Why can you not use sftp?

      An intelligent man is sometimes forced to be drunk to spend time with his fools
      If you get confused: Listen to the Music Play
      Please don't Chat/PM me for help, unless mod related
      SG-4860 24.11 | Lab VMs 2.8, 24.11

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      • S
        sasa1
        last edited by

        Hi,
        unfortunately, the ftp servers to which I have to connect are not managed by me, I use the client part.
        I attach image related to the error I have on the ftp client.
        The same connection, from the same ftp client to the same ftp server, from a PC that is not behind pfsense works well.
        Thanks.0_1548865469169_ftp4.JPG

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        • johnpozJ
          johnpoz LAYER 8 Global Moderator
          last edited by johnpoz

          Dude how dense can you be?? the ftp.exe in pfsense does NOT support passive... If you want to use active ftp client behind pfsense you need to install the ftp package!!

          They might have a passive cmd - IT DOESNT WORK!!! windows ftp.exe ONLY supports active!!!

          An intelligent man is sometimes forced to be drunk to spend time with his fools
          If you get confused: Listen to the Music Play
          Please don't Chat/PM me for help, unless mod related
          SG-4860 24.11 | Lab VMs 2.8, 24.11

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          • S
            sasa1
            last edited by

            Hi,
            so an ftp client that is behind pfsense and needs to access an ftp server that only supports passive mode, will it never work?
            did I get it right ?
            Thanks.

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            • stephenw10S
              stephenw10 Netgate Administrator
              last edited by stephenw10

              No.
              Passive FTP will work fine with the client behind pfSense without the proxy package.
              Active FTP requires the client proxy package.

              Since the Windows ftp client apparently only supports active mode you need the client proxy package.

              https://www.netgate.com/docs/pfsense/nat/ftp-without-a-proxy.html#client-behind-pfsense

              But are you sure those servers don't support encrypted mode? If they do you just switch to that.

              Steve

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              • johnpozJ
                johnpoz LAYER 8 Global Moderator
                last edited by johnpoz

                So which is it you do not read english, or your trolling... Have been over this multiple times now!!

                Please what part is unclear here

                Again the ftp client (ftp.exe) in windows only supports ACTIVE... If you want to use active on clients behind pfsense then you need to install that package..

                If your clients use passive then no you do not need the package...

                And before that how can this be clearer

                ms ftp client only supports active mode. If you want to use active mode ftp with client behind pfsense to ftp server outside pfsense you need to install the ftp package and configure it. Its called FTP_Client_Proxy in the packages.

                Your ftp.exe command tells the server hey lets do passive - and the server answers back ok, lets do passive - connect here on this port... The problem is the ftp.exe from windows will not do passive... You have to use the ftp package in pfsense to allow for active connections from clients behind pfsense because the firewall needs to open the port back to the client..

                An intelligent man is sometimes forced to be drunk to spend time with his fools
                If you get confused: Listen to the Music Play
                Please don't Chat/PM me for help, unless mod related
                SG-4860 24.11 | Lab VMs 2.8, 24.11

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                • S
                  sasa1
                  last edited by

                  Hi,
                  it does not work either in active or passive mode.
                  I installed the ftp proxy package and I indicated the LAN as an interface to be used (I have not modified any other parameter) but also in this way I always have the same problem.

                  I'm sorry if I did not understand what you told me but I can not understand where I'm wrong.
                  Thanks.

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                  • stephenw10S
                    stephenw10 Netgate Administrator
                    last edited by stephenw10

                    If you set 'Log Connections' in the proxy settings do you see firewall log entries for it?

                    Do you see blocked traffic from the FTP server?

                    You might try using a different FTP client as a test here such as Filezilla. That will show you exactly what it's doing.

                    Steve

                    S 1 Reply Last reply Reply Quote 0
                    • johnpozJ
                      johnpoz LAYER 8 Global Moderator
                      last edited by johnpoz

                      is the checkbox set to move it up the higher on the rules?

                      Here just tested this

                      C:\WINDOWS\system32>ftp speedtest.tele2.net
                      Connected to speedtest.tele2.net.
                      220 (vsFTPd 2.3.5)
                      200 Always in UTF8 mode.
                      User (speedtest.tele2.net:(none)): anonymous
                      331 Please specify the password.
                      Password:
                      230 Login successful.
                      ftp> ls
                      200 PORT command successful. Consider using PASV.
                      150 Here comes the directory listing.
                      1000GB.zip
                      100GB.zip
                      100KB.zip
                      100MB.zip
                      10GB.zip
                      10MB.zip
                      1GB.zip
                      1KB.zip
                      1MB.zip
                      200MB.zip
                      20MB.zip
                      2MB.zip
                      3MB.zip
                      500MB.zip
                      50MB.zip
                      512KB.zip
                      5MB.zip
                      upload
                      226 Directory send OK.
                      ftp: 183 bytes received in 0.02Seconds 11.44Kbytes/sec.
                      ftp>
                      

                      active works just fine with windows ftp client behind pfsense..

                      You can see where its allowed through the firewall with these rules

                       	Jan 30 12:28:54 	► LAN 	(@0) 	90.130.70.73:20		192.168.9.100:55659		TCP:S
                      	Jan 30 12:28:54 	WAN 	(@0) 	90.130.70.73:20		192.168.9.100:55659		TCP:S 
                      

                      Here doing it again with sniff..
                      0_1548873396618_controlanddatasniff.png

                      Notice the port command sent is my machine rfc1918 IP, the ftp client changes that to my public IP, and if you do the math on the command (217*256)+148 = 55700 which is the port the data channel is sent to..

                      An intelligent man is sometimes forced to be drunk to spend time with his fools
                      If you get confused: Listen to the Music Play
                      Please don't Chat/PM me for help, unless mod related
                      SG-4860 24.11 | Lab VMs 2.8, 24.11

                      S 1 Reply Last reply Reply Quote 1
                      • S
                        sasa1 @stephenw10
                        last edited by

                        @stephenw10
                        Trace: CControlSocket::SendNextCommand()
                        Trace: CFtpLogonOpData::Send() in state 0
                        Stato: Risoluzione dell'indirizzo IP x.y.eu in corso
                        Stato: Connessione a x.x.x.x:21...
                        Stato: Connessione stabilita, in attesa del messaggio di benvenuto...
                        Trace: CFtpControlSocket::OnReceive()
                        Risposta: 220 Microsoft FTP Service
                        Trace: CFtpLogonOpData::ParseResponse() in state 1
                        Trace: CControlSocket::SendNextCommand()
                        Trace: CFtpLogonOpData::Send() in state 5
                        Comando: USER pippo
                        Trace: CFtpControlSocket::OnReceive()
                        Risposta: 331 Password required
                        Trace: CFtpLogonOpData::ParseResponse() in state 5
                        Trace: CControlSocket::SendNextCommand()
                        Trace: CFtpLogonOpData::Send() in state 5
                        Comando: PASS **********
                        Trace: CFtpControlSocket::OnReceive()
                        Risposta: 230 User logged in.
                        Trace: CFtpLogonOpData::ParseResponse() in state 5
                        Trace: CControlSocket::SendNextCommand()
                        Trace: CFtpLogonOpData::Send() in state 9
                        Comando: OPTS UTF8 ON
                        Trace: CFtpControlSocket::OnReceive()
                        Risposta: 200 OPTS UTF8 command successful - UTF8 encoding now ON.
                        Trace: CFtpLogonOpData::ParseResponse() in state 9
                        Stato: Accesso effettuato
                        Trace: Measured latency of 5 ms
                        Trace: CFtpControlSocket::ResetOperation(0)
                        Trace: CControlSocket::ResetOperation(0)
                        Trace: CFtpLogonOpData::Reset(0) in state 14

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                        • S
                          sasa1 @johnpoz
                          last edited by

                          @johnpoz I do not work, when I run "ls" I have the error message that I attach0_1548873937691_ftp error.JPG

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                          • johnpozJ
                            johnpoz LAYER 8 Global Moderator
                            last edited by johnpoz

                            I don't see any port or pasv command sent in that log... Just sniff on the wan and lan of pfsense while you doing this so you can validate what is happening... ftp control is in the clear so as you see above you can see exactly what is sent by the client in the control channel. If when you sniff on the wan side you will see the ftp package change your port command to your actual public IP

                            Is pfsense behind a NAT? Not going to work if behind a NAT..

                            Is the wan of pfsense on a public IP? Sniff while you do that test of ftp to speedtest.tele2.net

                            So we can see exactly what is happening.

                            An intelligent man is sometimes forced to be drunk to spend time with his fools
                            If you get confused: Listen to the Music Play
                            Please don't Chat/PM me for help, unless mod related
                            SG-4860 24.11 | Lab VMs 2.8, 24.11

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                            • S
                              sasa1
                              last edited by

                              yes, the computer is behind a NAT, it has a private IP address.

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                              • johnpozJ
                                johnpoz LAYER 8 Global Moderator
                                last edited by

                                NO pfsense is its wan a rfc1918 or the is it public?

                                An intelligent man is sometimes forced to be drunk to spend time with his fools
                                If you get confused: Listen to the Music Play
                                Please don't Chat/PM me for help, unless mod related
                                SG-4860 24.11 | Lab VMs 2.8, 24.11

                                S 1 Reply Last reply Reply Quote 0
                                • S
                                  sasa1 @johnpoz
                                  last edited by

                                  @johnpoz on pfsense I have wan interface e lan interface, on wan interface I have an public IP address.

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                                  • johnpozJ
                                    johnpoz LAYER 8 Global Moderator
                                    last edited by

                                    Like I said do a simple sniff.. And you can see exactly what is going on..

                                    Here sniff (diag, packet capture on my wan) you can see my login on port 21... See where the PORT command gets changed to my public IP..

                                    0_1548874506740_sniffonwan.png

                                    Then here comes the data connection to the port in the the port command

                                    0_1548874537590_datasniffonwan.png

                                    (200*256)+175 = port 51375

                                    An intelligent man is sometimes forced to be drunk to spend time with his fools
                                    If you get confused: Listen to the Music Play
                                    Please don't Chat/PM me for help, unless mod related
                                    SG-4860 24.11 | Lab VMs 2.8, 24.11

                                    S 2 Replies Last reply Reply Quote 0
                                    • S
                                      sasa1 @johnpoz
                                      last edited by

                                      This post is deleted!
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                                      • S
                                        sasa1 @johnpoz
                                        last edited by

                                        @johnpoz sorry I do not know how to capture the really useful information, in the figure I sent I deleted the private IP address that is shown in the capture0_1548881523155_Cattura.JPG

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                                        • johnpozJ
                                          johnpoz LAYER 8 Global Moderator
                                          last edited by johnpoz

                                          Dude are you hiding a 10.x.x.x address? Why??? They are private and do not route on the internet... That info is useless to anyone knowing what it is.. Its like telling you I live in the US.. or the planet Earth.. Notice how I didn't hide my 192.168.9.100 address ;) You can capture the info right on pfsense.. diagnostic menu packet capture.

                                          Do the capture on your WAN interface so we can validate its getting changed to your public wan IP.. Then just download the capture and open with wireshark.

                                          In wireshark just right click on say the syn of the control channel and say follow stream.

                                          BTW, I am a mod so I can see your deleted post ;) There is ZERO reason to hide 10.0.0.18.. You need to validate that gets changed on your WAN.. This is why you need to do the sniff on the WAN of pfsense to validate your ftp package is working.

                                          here
                                          0_1548883707284_packetcapture.png

                                          Then download and open with wireshark
                                          0_1548883729585_openwithwire.png

                                          An intelligent man is sometimes forced to be drunk to spend time with his fools
                                          If you get confused: Listen to the Music Play
                                          Please don't Chat/PM me for help, unless mod related
                                          SG-4860 24.11 | Lab VMs 2.8, 24.11

                                          S 1 Reply Last reply Reply Quote 0
                                          • S
                                            sasa1 @johnpoz
                                            last edited by

                                            @johnpoz here is the log, I hope it contains useful information.
                                            Thanks.0_1548927500486_cattura1.PNG

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