FTP works on LAN but not from WAN [Answered]RSS

2 replies

Last post Nov 27, 2011 04:22 PM by aaaaaaum

  • FTP works on LAN but not from WAN

    Nov 27, 2011 05:20 AM|aaaaaaum|LINK

     Using Windows 2008 Server 32-bit, IIS7 FTP 7.5

     External Port scan confirms port 21 is open.

     Windows Firewall is disabled.

     Can FTP from LAN but not from WAN.

     

     Stopped FTP Server.

     Installed FileZilla Server and have the same behavior.

     

     FTP requests from WAN side are not being heard even though external port scan shows Port 21 open.

     Have gone through all the documentation on www.iis.net.

     

     Help please...

  • Re: FTP works on LAN but not from WAN

    Nov 27, 2011 06:07 AM|lextm|LINK

    IIS.net site documents cannot tell you what happens on your network. You should understand that any devices in between can filter out the FTP packets.

    Using tools such Network Monitor or Wireshark should help you better analyze the network connections, and provide you hints on what is the problem.

    A network expert is needed, and you should try to find a guy like that locally to help you.

    Regards,

    Lex Li
    https://lextudio.com
    ---------------------------
    This posting is provided "AS IS" with no warranties, and confers no rights.
  • Re: FTP works on LAN but not from WAN

    Nov 27, 2011 04:22 PM|aaaaaaum|LINK

     Located problem on router.

     Disabled "Filter Internet NAT Redirection" and FTP started working.