FTP Clients can not connect

[RonW]

After installing FTP Server using XP Pro IIS, clients have been unable to
connect.
Using Westell Speedwire Modem B90-210015-04 and Siemens SpeedStream 2Port
Router SS2602 with Verizon DSL as ISP.
The Siemens Router was set to allow Port 21 to be Open. I have verified
that the port is open.
Netstat –an shows Port 21 Listening
A test with the router disconnected still failed.
An exception was made in Windows Firewall allowing Port 21 for FTP, to
correct an issue for users of XP SVC PK 2 (although I have SVC PK 3)
Although I am using a dynamic IP address it has not changed during the test
period, thereby seeming to offer the client a valid address.
Ftp.your.spot does not return an address.
All help appreciated.

 

[Jack \(MVP-Networking\).]

Hi
Try first locally. I.e from another computer on your network using the
Server computer's local IP.
In my local Verizon blocks port 80. I never tried ftp, but I would Not be
surprised if they block port 21 as well.
Jack (MS, MVP-Networking)

 

[RonW]

My second computer on the network is currently unavailable but I believe it
would connect with the local address.
I checked with Verizon and they claim they are not blocking any ports.