Port 21 again!

[ERROR][Address already in use]
Unable to start a stand alone server. Address already in use.

Hello,

I'm Mac based, but experiencing exactly the same problem as suffered by Hookem08: Port 21 Help (FTP)

Jan 26 21:06:39 bvk2's-Computer pure-ftpd: (?@?) [ERROR]
Unable to start a standalone server: [Address already in use]

I'm testing locally: 10.1.1.2 and have tried turning off the firewall and disconnecting from the internet. I've also tried from the PC using ws_ftp, but with the same error message.

My question is simply:
How do I find out what program is already using port 21 so that I can uninstall it?

FTP access is enabled in the Mac's firewall settings.
FTP access is not blocked by service filtering in the modem/router's firewall settings.

I've set up port-forwading on port 21 to 10.1.1.2. (LAN IP of my computer).
PureFTP Manager >pure-ftpd listens on port: 21 is inactive and
cannot be changed.

Could anyone please offer a solution to this problem? What worked for Hookem08?

Thank you for any contributions.

Regards,

Bart

See what program responds when you telnet into your IP on port 21.

Thank you for replying.

I'm out of my depth when looking at the Terminal window. I've managed to turn on Telnet, but have no idea how to telnet into my IP on port 21.

I've tried the following, but think I'm on the wrong track:
Welcome to Darwin!
[Bart-Kelseys-Computer:~] bartkelsey% ssh -l bart 10.1.1.2
ssh: connect to address 10.1.1.2 port 22: Connection refused

Could you please instruct me of what to type in?

Thanks

You probably will not be able to ssh unless you've set up s(ecure)FTP b/c there's an additional encryption handshake involved in that connection.

I'm also not sure if you can telnet into your own private IP address (sorry, experience is a little short here).

I can telnet into the FTP server on my remote server by opening a Windows command prompt and using the builtin telnet program. When I open a connection via Windows telnet, I can tell it to which port I want to connect. When I `telnet X.X.X.X 21`, my FTP server replies.

What I'm suggesting is that you can see what/who replies when you telnet into your machine on port 21.

Welcome to Darwin!
[Bart-Kelseys-Computer:~] bartkelsey% telnet 10.1.1.2 21
Trying 10.1.1.2...
Connected to 10.1.1.2.
Escape character is '^]'.
Unable to start a standalone server: Address already in use
Connection closed by foreign host.
[Bart-Kelseys-Computer:~] bartkelsey%

Yea, um ... Sorry, this isn't my area of expertise.

What's in the error log for pure-ftpd? Can you increase the verbosity so you can get an idea of at exactly which step it's failing. Is it started or are you trying to start it when you get this error?

I'd stop trying to figure out what's on port 21 and look into why pure-ftpd won't start.

Also attempted from Microsoft Telnet:
Command to open port: 10.1.1.2 21
Unable to start a stand alone server: Address already in use.

Pure FTP Manager is running. Unfortunately, there is no more information which can be gleaned from the log.


FTPd Manager - Server Status

pure-ftpd is running...
Current number of sessions: 0
Total bandwidth usage: 0 B

Feb 1 14:21:24 Bart-Kelseys-Computer pure-ftpd: (?@?) [ERROR] Unable to start a standalone server: [Address already in use]

If I quit FTP Manager and telnet from my PC (rather than the host Mac), the server busy message is still displayed.