FTP behind a router with Windows XP Professional FTP Server

[Alan]

I have been using a the FTP server running on Windows XP Professional with a
static IP for years with no trouble.
I have recently added a router as a firewall and port forwarded port 80 for
the web server no problem there and port 20 & 21 for the FTP server. I don't
think I have all of the necessary ports open to allow file transfers. I keep
getting permission errors. You can get a connection but transfers fail. Has
anyone set this up before without opening so many ports that the firewall is
useless. Is the version of IIS released with Windows XP Professional capable
of assigning ports for these transfers I understand you need 2 ports per
connection. Any help with this problem would be appreciated.

 

[Jack \(MVP-Networking\).]

Hi
FTP server can work in Passive or Active mode. Each mode have its own ports
configuration and need to be attendant to in the Router ports configuration.
http://support.microsoft.com/kb/555022
http://support.microsoft.com/kb/555022
Jack (MS, MVP-Networking

 

[Alan]

Hi Jack
The article was helpful I tried setting the passive range both ways and the
range used by the XP FTP server did not seem to change. Maybe the FTP server
in XP is limited. I tried another FTP server (GuildFTP) and it will let you
change the passive port range in the application settings. The only thing is
it won't let me shorten the port range down as small as I would like. As long
as there are not two many connections I can still limit the range on the
router. I can set the start of the range used and just open as many as I
think I need.
Thanks,