Tom's Hardware > Forum > General Networking > Network General Discussions > Port 21 is in use?
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CompIliterate   04-25-2002 at 05:58:02 AM

Hello, I have a question regarding port 21. Recently, my friend tried to send me a file via ICQ but it failed to deliver. So I install Bulletproof FTP server software so that he can upload the file to me. When I tried to connect the FTP server, it said fail to connect server, port 21 is in use. What does that mean? I tried open and close port 21 but still getting the same message. I'm using Linksys router w/4 ports switch.

Thanks in advance.

<P ID="edit"><FONT SIZE=-1><EM>Edited by CompIliterate on 04/24/02 11:59 PM.</EM></FONT></P>

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Zlash   04-25-2002 at 06:13:22 AM
- 0 +

It might mean it's in use on the other computer, not sure. You can always goto a command prompt and do a "net stat" and see if anything is on port 21.

<font color=red>:</font color=red> <font color=white>:</font color=white> <font color=blue>:</font color=blue>

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jlanka   04-25-2002 at 08:49:56 AM
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use "netstat -a" to see all ports in use

<i>It's always the one thing you never suspected.</i>

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CALV   04-25-2002 at 10:41:07 AM
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hoe did you try to connect to it? I run an ftp server, but if i conenct to xx.xx.x.x (my external ip) I cant conenct to it.

If they squeeze olives to get olive oil, how do they get baby oil?

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CompIliterate   04-25-2002 at 07:07:05 PM
- 0 +

Thanks for the feedbacks guys. I really appreciate it. CALV, I tried to get FTP server online, I click on the "connect" icon, that's when I get the port 21 in use message.

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jlanka   04-25-2002 at 10:38:44 PM
- 0 +

what OS are you running? If NT/2K/XP do you possibly already have a default ftp server running? Try ftp-ing to yourself and see if it responds.

<i>It's always the one thing you never suspected.</i>

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CompIliterate   04-26-2002 at 12:51:15 AM
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I'm running w2k workstation. I'll try that. Thanks

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CALV   04-26-2002 at 10:26:18 AM
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Good point, IIS is probably running (you may want to ensure you have the 2k updates or you may end up with .eml attatchments all over the place.........)




If they squeeze olives to get olive oil, how do they get baby oil?

Reply to CALV
CompIliterate   04-27-2002 at 12:54:52 AM
- 0 +

I'll try a patch for w2k. Bulletproof is the only FTP server that I have installed. Thanks again

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