PFSense blocks FTP Passive traffic



  • Hi,

    I would like to use an FTP server behind a PFSense firewall. I could use SFTP (that works), but I would like to use FTPS in PASV mode. The FTP server has been configured to only use port 50001 - 50100 for PASV communication. FTP details shows thats oke, but it looks like PFSense still blocks port 50001 - 50100.

    I have added a Firewall Rule (on LAN tab) IPv4 - TCP/UDP Source: * Port: * Destination:* Port 50001 - 50100 Gateway: *

    STATUS:>  [10/23/2015 5:10:49 PM] Getting listing ""…
    STATUS:>  [10/23/2015 5:10:49 PM] Resolving host name ftp.server.com
    STATUS:>  [10/23/2015 5:10:49 PM] Host name ftp.server.com resolved: ip = 46.x.x.x.
    STATUS:>  [10/23/2015 5:10:49 PM] Connecting to FTP server… ftp.server.com:21 (ip = 46.x.x.x)...
    STATUS:>  [10/23/2015 5:10:49 PM] Socket connected. Waiting for welcome message…
    [10/23/2015 5:10:49 PM] 220 ProFTPD 1.3.5a Server (ProFTPD) [192.168.1.200]
    STATUS:>  [10/23/2015 5:10:49 PM] Connected. Authenticating…
    COMMAND:> [10/23/2015 5:10:49 PM] AUTH SSL
    [10/23/2015 5:10:49 PM] 234 AUTH SSL successful
    STATUS:>  [10/23/2015 5:10:49 PM] Establishing SSL session…
    STATUS:>  [10/23/2015 5:10:49 PM] Connected. Exchanging encryption keys…
    Session Cipher: 0 bit
    STATUS:>  [10/23/2015 5:10:49 PM] SSL Connect time: 78 ms.
    STATUS:>  [10/23/2015 5:10:49 PM] SSL encrypted session established.
    COMMAND:> [10/23/2015 5:10:49 PM] PBSZ 0
    [10/23/2015 5:10:49 PM] 200 PBSZ 0 successful
    COMMAND:> [10/23/2015 5:10:49 PM] USER userftp
    [10/23/2015 5:10:49 PM] 331 Password required for userftp
    COMMAND:> [10/23/2015 5:10:49 PM] PASS *****
    [10/23/2015 5:10:49 PM] 230 User userftp logged in
    STATUS:>  [10/23/2015 5:10:49 PM] Login successful.
    COMMAND:> [10/23/2015 5:10:49 PM] SYST
    [10/23/2015 5:10:49 PM] 215 UNIX Type: L8
    STATUS:>  [10/23/2015 5:10:49 PM] Host type detected: Unix.
    COMMAND:> [10/23/2015 5:10:49 PM] PWD
    [10/23/2015 5:10:49 PM] 257 "/" is the current directory
    STATUS:>  [10/23/2015 5:10:49 PM] Home directory: /
    COMMAND:> [10/23/2015 5:10:49 PM] FEAT
    [10/23/2015 5:10:49 PM] Informational Message Only:
    211-Features:
    CCC
    PBSZ
    AUTH TLS
    MFF modify;UNIX.group;UNIX.mode;
    REST STREAM
    MLST modify*;perm*;size*;type*;unique*;UNIX.group*;UNIX.mode*;UNIX.owner*;
    UTF8
    LANG en-US*
    EPRT
    EPSV
    MDTM
    SSCN
    TVFS
    MFMT
    SIZE
    PROT
    211 End
    STATUS:>  [10/23/2015 5:10:49 PM] This site supports features.
    STATUS:>  [10/23/2015 5:10:49 PM] This site supports SIZE.
    STATUS:>  [10/23/2015 5:10:49 PM] This site supports UTF-8.
    STATUS:>  [10/23/2015 5:10:49 PM] This site supports LANG.
    COMMAND:> [10/23/2015 5:10:49 PM] OPTS UTF8 on
    [10/23/2015 5:10:49 PM] 200 UTF8 set to on
    STATUS:>  [10/23/2015 5:10:49 PM] This site can resume broken downloads.
    COMMAND:> [10/23/2015 5:10:49 PM] REST 0
    [10/23/2015 5:10:49 PM] 350 Restarting at 0. Send STORE or RETRIEVE to initiate transfer
    COMMAND:> [10/23/2015 5:10:49 PM] PBSZ 0
    [10/23/2015 5:10:49 PM] 200 PBSZ 0 successful
    COMMAND:> [10/23/2015 5:10:49 PM] PROT P
    [10/23/2015 5:10:49 PM] 200 Protection set to Private
    COMMAND:> [10/23/2015 5:10:49 PM] PASV
    [10/23/2015 5:10:49 PM] 227 Entering Passive Mode (192,168,1,200,195,122).
    STATUS:>  [10/23/2015 5:10:49 PM] Substituting received PASV address 192.168.1.200 to server address 46.x.x.x.
    COMMAND:> [10/23/2015 5:10:49 PM] LIST
    STATUS:>  [10/23/2015 5:10:49 PM] Connecting FTP data socket… 46.x.x.x:50042...
    ERROR:>  [10/23/2015 5:11:10 PM] The connection failed due to an error or timeout.

    Any help could be usefull. I have tried the PFSense KB, but I can't fix it using this information. Thanks!


  • Banned

    https://forum.pfsense.org/index.php?action=search
    https://doc.pfsense.org/index.php/FTP_without_a_Proxy

    @Stendec75:

    I have tried the PFSense KB, but I can't fix it using this information. Thanks!

    Yeah, you need to re-read it until you understand that you must configure your FTP server to stop sending this RFC1918 BS to clients:

    [10/23/2015 5:10:49 PM] 220 ProFTPD 1.3.5a Server (ProFTPD) [[color=red]192.168.1.200]
    [10/23/2015 5:10:49 PM] Substituting received PASV address 192.168.1.200 to server address 46.x.x.x.

    @Stendec75:

    I have added a Firewall Rule (on LAN tab)

    No. That's NOT where you add the rule. Again, re-read the above docs.


  • LAYER 8 Global Moderator

    "but I would like to use FTPS in PASV mode."

    Why I would have to ask…  sftp is so much easier!!!

    But yes as dok points out your doing it wrong, you need to setup your port forwards for your passive range..  And also should setup your ftp server to send out your public IP and not expect client to fix it..

    STATUS:>    [10/23/2015 5:10:49 PM] Substituting received PASV address 192.168.1.200 to server address 46.x.x.x.


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