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Case Study - Can't access FTP after installing Server 2003 SP1

Situation: the client has FTP on  a Windows Server 2003 that comes with two NICs. No one can access the FTP after they installed SP1. Even the inside users can't access the FTP. However, they can access the server by using VPN or Remote Desktop Connection.

Troubleshooting: telnet port 1723 and 3389 is OK but not port 21 (which is FTP port). No Windows Firewall or other firewall is enabled or installed. No IP or inbound filtering is enabled. Finally, we find the problem is NAT blocking the FTP. What we don't know is if the sp1 disabled the FTP or they enabled NAT after sp1 and forgot to open the FTP port.

Resolution: Open RRAS>IP Routing>NAT, right-click external NIC>Properties>Services and ports, check FTP and click Edit. To forward to an internal IP, type IP address in Private address

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Related Topics

NAT/Firewall
Troubleshooting Windows Server2003 SP1 Issues

NAT/Firewall
Troubleshooting Windows Server2003 SP1 Issues

Microsoft Windows New release Issues

Don't use Windows Firewall as a complete security solution, Case study. Can't access the shared folder on 2003 server with sp1 ...
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connection issues after 2003 sp1

ftp uploads fail if file size is greater than 8kb ("unable to open data ... while the ftp tool (here: smartftp, but same behaviour in comand line ftp) ...
www.chicagotech.net/Q&A/2003sp1b.htm

The connection with the server was reset

Symptoms: When trying to access Windows FTP server, you may have following ... You receive FTP Folder Error An error occurred opening that folder on the ...
www.chicagotech.net/troubleshooting/eventid10.htm

Windows FTP errors

Symptom 1: When accessing Windows FTP server, you may receive this message: ... 1) verify the ftproot folder permission; 2) verify FTP security settings. ...
www.chicagotech.net/server/ftp1.htm


 

 


 

 

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