My ftp server..

[FTPSlave]

I'm running Cerberus ftp server on my XP Professional box, and when I try to connect, everything goes down fine until I use the DIR command. Then it tries to LIST, and then reports that it's unable to open the data connection.

Like I said, i'm running XP Professional and the Cerberus ftp server. I also have a Linksys router as my default gateway onto the internet.

Any suggestions would be appreciated!

[james]

we need a more detail. "everything goes well" does not qualify. Explain exactly what you can accomplish and what fails. Explain how you are connecting to the box and where are you connecting from etc. with this, we should be able to give you help

[FTPSlave]

Ok.. sorry.

When I use the FTP command to connect to my server from the command prompt (I'm connecting from the box that the server is located on, but it needs to be able to connect from anywhere), it brings up the MOTD banner and the login prompt. It accept the username and password I set in the server, and brings me to the ftp> prompt. If I type DIR at the ftp> prompt, it says "200 Port command received," sits there for about 10 seconds, and then says "425 Unable to open the data connection."

If I go over to see what the server is doing, it reports an incoming request from the IP of the server (the LAN IP, not the WAN IP). Then it reports that the request was accepted by my router (the LAN network address). Then there are the USER and PASS commands that match the login info I used. Then it says "PORT 192, 168, 1, 1, 15, 192." My router's IP is 192.168.1.1, so I'm assuming that is the first four numbers. The last two seem arbitrary. After the PORT command, it tries a LIST command, which fails, saying "The attempt to connect timed out without establishing..."

So I can connect to the FTP server, but I'm unable to see what's on it.

[Uranium-235]

go into passive mode on your client

[FTPSlave]

I'm not sure how to do that with command line FTP, but I tried it with WS_FTP and still no connection.

[Uranium-235]

damn, BTW refrence, to enter passive in command-line it's

quot pasv

[Olavur]

I have a similar problem to FTPSlave, and it is not solved by turning on passive mode.

When I turn passive mode on - either in WS_FTP LE or in Windows FTP, the answer is "421 Unable to create socket to listen on".

However, it should be mentioned that I use port 2021 for the connection, and that the ftp CLIENT is behind a proxy. It all works find when the ftp client is not behind a proxy. The Linksys router is set to accept the 2021 port and route any traffic to the appropriate computer. When I use the standard port 21, there is no problem, even if the client is behind a proxy.

The proxy (in front of the ftp client) has no filter on port 2021, and it works to log in to the ftp server, get the current directory, change directory, but not to LIST or change to passive mode.

[xMerCLorDx]

you sure its 2021 and not port 20 and port 21? because port 20 and 21 are both used seperately..but also higher ( public ) socket numbers are used with most ftp server software..

[Olavur]

Yes, it is port 2021 (not 20 and 21).

[Jim H]

I'm having same problem. Running Win XP Pro. Command line reports invalid command if I issue "quot pasv" command. Any ideas?

[C]

can anyone explain exactly what happens (server and client actions) when an FTP client issues a LIST command when using passive/active transfer mode?

[james]

i've seen this problem now with serveral servers and passive/active mode doesn't seem to affect anything. My first assumption would be to say its a firewall issue, since ftp uses separate ports for connecting and transferring data (i believe sending the list would fall in that category). But that doesn't seem to be the issue here (since it's on a LAN). I found on several of the servers if you delete the account and recreate it the problem goes away, but not always.