Open port

**Mc Brain** · Dec 23rd, 2002, 04:48 PM

Each time I run my FTP Server keeps saying that it cannot open the port 21 because it's being used. Is there anyway to know who's opening... or just close the connection??

**killerSD** · Dec 23rd, 2002, 04:52 PM

Goto your Command Prompt
type netstat -a

that will show you all your active connections and what ahs them opened.

Hope that helps...

**Mc Brain** · Dec 23rd, 2002, 04:57 PM

Ok... and what does this mean:

Code:

  Proto  Local Address        Remote Address       State
  TCP    one:ftp              one:0                LISTENING

**killerSD** · Dec 23rd, 2002, 05:01 PM

it means someone, most likely you since you said you are running ftp, is listening for information via tcp. I take it your comptuer name is "one" and port 0 is being used, which i think is wierd...understand?

If I am wrong , someone please correct me

**Shawn N** · Dec 23rd, 2002, 05:01 PM

Use -o to show the process ID of the connection's owner. Then you can use Task Manager to end the app.

**Mc Brain** · Dec 23rd, 2002, 05:04 PM

BTW... aren't to many ports opened??

Code:

  Proto  Local Address        Remote Address       State
  TCP    one:ftp              one:0                LISTENING
  TCP    one:ftp              one:0                  LISTENING
  TCP    one:smtp             one:0                  LISTENING
  TCP    one:http             one:0                  LISTENING
  TCP    one:epmap            one:0                  LISTENING
  TCP    one:https            one:0                  LISTENING
  TCP    one:microsoft-ds     one:0                  LISTENING
  TCP    one:999              one:0                  LISTENING
  TCP    one:1025             one:0                  LISTENING
  TCP    one:1028             one:0                  LISTENING
  TCP    one:1031             one:0                  LISTENING
  TCP    one:1933             one:0                  LISTENING
  TCP    one:1934             one:0                  LISTENING
  TCP    one:1935             one:0                  LISTENING
  TCP    one:1936             one:0                  LISTENING
  TCP    one:2498             one:0                  LISTENING
  TCP    one:2499             one:0                  LISTENING
  TCP    one:2556             one:0                  LISTENING
  TCP    one:5000             one:0                  LISTENING
  TCP    one:5678             one:0                  LISTENING
  TCP    one:5679             one:0                  LISTENING
  TCP    one:7438             one:0                  LISTENING
  TCP    one:20004            one:0                  LISTENING
  TCP    one:60652            one:0                  LISTENING
  TCP    one:netbios-ssn      one:0                  LISTENING
  TCP    one:ms-sql-s         one:0                  LISTENING
  TCP    one:2499             205.188.11.23:5190     ESTABLISHED
  TCP    one:3307             cumeil7.prima.com.ar:pop3  TIME_WAIT
  TCP    one:3309             24.232.0.19:pop3       TIME_WAIT
  TCP    one:3311             mail.fibertel.com.ar:pop3  TIME_WAIT
  TCP    one:3313             jeeves.sinectis.com.ar:pop3  TIME_WAIT
  TCP    one:3315             zaphod.sinectis.com.ar:pop3  TIME_WAIT
  TCP    one:3319             mail.fibertel.com.ar:pop3  TIME_WAIT
  TCP    one:3321             mail.fibertel.com.ar:pop3  TIME_WAIT
  TCP    one:3325             mail.fibertel.com.ar:pop3  TIME_WAIT
  TCP    one:3327             mail.fibertel.com.ar:pop3  TIME_WAIT
  TCP    one:3361             200.49.139.132:http    TIME_WAIT
  TCP    one:990               one:0                  LISTENING
  TCP    one:990               one:1934               ESTABLISHED
  TCP    one:1026             one:0                  LISTENING
  TCP    one:1027             one:0                  LISTENING
  TCP    one:1027             one:2498               ESTABLISHED
  TCP    one:1027             one:3300               TIME_WAIT
  TCP    one:1027             one:3332               TIME_WAIT
  TCP    one:1027             one:3340               TIME_WAIT
  TCP    one:1027             one:3342               TIME_WAIT
  TCP    one:1027             one:3343               TIME_WAIT
  TCP    one:1027             one:3356               TIME_WAIT
  TCP    one:1040             one:0                  LISTENING
  TCP    one:1040             one:3302               TIME_WAIT
  TCP    one:1040             one:3306               TIME_WAIT
  TCP    one:1040             one:3308               TIME_WAIT
  TCP    one:1040             one:3310               TIME_WAIT
  TCP    one:1040             one:3314               TIME_WAIT
  TCP    one:1040             one:3316               TIME_WAIT
  TCP    one:1040             one:3318               TIME_WAIT
  TCP    one:1040             one:3320               TIME_WAIT
  TCP    one:1040             one:3322               TIME_WAIT
  TCP    one:1040             one:3324               TIME_WAIT
  TCP    one:1040             one:3326               TIME_WAIT
  TCP    one:1040             one:3328               TIME_WAIT
  TCP    one:ms-sql-s         one:0                  LISTENING
  TCP    one:1933             one:5679               ESTABLISHED
  TCP    one:1934             one:990                ESTABLISHED
  TCP    one:1935             one:5678               ESTABLISHED
  TCP    one:1936             one:5678               ESTABLISHED
  TCP    one:2498             one:1027               ESTABLISHED
  TCP    one:2556             one:1027               CLOSE_WAIT
  TCP    one:3304             one:1040               TIME_WAIT
  TCP    one:3312             one:1040               TIME_WAIT
  TCP    one:3350             one:1027               TIME_WAIT
  TCP    one:3354             one:1027               TIME_WAIT
  TCP    one:3360             one:1027               TIME_WAIT
  TCP    one:5678             one:1935               ESTABLISHED
  TCP    one:5678             one:1936               ESTABLISHED
  TCP    one:5679             one:1933               ESTABLISHED
  TCP    one:11854            one:0                  LISTENING
  TCP    one:netbios-ssn      one:0                  LISTENING
  UDP    one:epmap            *:*
  UDP    one:microsoft-ds     *:*
  UDP    one:1029             *:*
  UDP    one:1030             *:*
  UDP    one:ms-sql-m         *:*
  UDP    one:3456             *:*
  UDP    one:4737             *:*
  UDP    one:netbios-ns       *:*
  UDP    one:netbios-dgm      *:*
  UDP    one:isakmp           *:*
  UDP    one:1035             *:*
  UDP    one:1635             *:*
  UDP    one:1691             *:*
  UDP    one:2262             *:*
  UDP    one:2321             *:*
  UDP    one:netbios-ns       *:*
  UDP    one:netbios-dgm      *:*
  UDP    one:isakmp           *:*

**killerSD** · Dec 23rd, 2002, 05:06 PM

WOW....

Do you have a firewall???
You really should think about one if oyu dont!!!

**Shawn N** · Dec 23rd, 2002, 05:09 PM

Way to many ports open...I'd definately do a netstat -o to see what programs are waiting for connections.

killerSD: the 0 is there because there's no connection. The port is just listening.

**Mc Brain** · Dec 23rd, 2002, 05:13 PM

Originally posted by Shawn N
Way to many ports open...I'd definately do a netstat -o to see what programs are waiting for connections.

killerSD: the 0 is there because there's no connection. The port is just listening.

The -o option does not seem to exist here.

**Mc Brain** · Dec 23rd, 2002, 05:15 PM

Originally posted by killerSD
WOW....

Do you have a firewall???
You really should think about one if oyu dont!!!

I do have a firewall... but most of the connections remote addresses seem to be my computer

**killerSD** · Dec 23rd, 2002, 05:26 PM

killerSD: the 0 is there because there's no connection. The port is just listening.

Aight ... but there is such thing as port 0. Lol read in to it... it sounds liek fun!

**Mc Brain** · Dec 23rd, 2002, 05:30 PM

How do you close a connection?

**killerSD** · Dec 23rd, 2002, 05:41 PM

does your firewall have a lock?
if so you could "try" to lock all internet access then restart your connection..
I am just guessing here ... i will look in to it more if someone doesnt post.

**Shawn N** · Dec 23rd, 2002, 05:50 PM

Get ZoneAlarm. It's free and will tell you what programs are trying to do.

**killerSD** · Dec 23rd, 2002, 05:53 PM

He is right... Zonealarm is Awesome! I use it and it is amazing.

**Mc Brain** · Dec 23rd, 2002, 05:57 PM

I will... althought I'm afraid that it start messing things up with Norton's. Anyway... how do you close a connection?

**Shawn N** · Dec 23rd, 2002, 05:59 PM

I don't know of any simple way to close another processes connection other than using ZoneAlarm.

**Mc Brain** · Dec 23rd, 2002, 06:13 PM

Ok... and how would you close this connection:

Code:

TCP    one:ftp              one:0                LISTENING

with ZoneAlarm? Isn't there any way to close it through VB or a DOS command??

**Shawn N** · Dec 23rd, 2002, 06:31 PM

McBrain that's not even a connection. That's just showing that your computer is listening on that port, waiting for a connection.

**Mc Brain** · Dec 23rd, 2002, 06:40 PM

Thanks!! I've realized that already. And found that Windows' FTP service should be stopped to get that port free.

**drew_1790** · Dec 23rd, 2002, 07:13 PM

you asked this over and over again, "how can i close a port/connection?" the truth is you cant.. you must close the application that has opened the port that is using it on your comp. netstat -n will give you all the remote connections..look at those and any suspicious ones you better check out..

**Shawn N** · Dec 23rd, 2002, 07:15 PM

You can close another processes connection, it's just not as simple as showing an input box. ZoneAlarm does it.

**drew_1790** · Dec 23rd, 2002, 07:20 PM

doesnt zonealarm simply disalow the application to send and establish a connection?

**Shawn N** · Dec 23rd, 2002, 07:25 PM

Err - maybe you're right. I haven't used the program for a while now so I forgot. I'm pretty sure that it is possible to close other program's connections, though.

**adzzzz** · Dec 23rd, 2002, 09:40 PM

is netstat -o only available on xp? because im on 2k and it just brings up the netstat help when i try it

**mxnmx** · Dec 24th, 2002, 04:44 AM

is netstat -o only available on xp? because im on 2k and it just brings up the netstat help when i try it

netstat-o in WinXp=netstat in Win2K

**Mc Brain** · Dec 24th, 2002, 05:02 AM

I don't have the -o option on W2K.

**mxnmx** · Dec 24th, 2002, 05:24 AM

You must be getting this when you type netstat in Win2k:

Code:

Proto  Local Address        Remote Address       State
  TCP    one:ftp              one:0                LISTENING
  TCP    one:ftp              one:0                  LISTENING
....

The State might be: Established, or Waiting or Listening. Anyways, when I type netstat-o in WinXP Pro I get the same thing as shown above so these two commands are same: in Win XP it is: netstat-o and in Win2k its just netstat, thats what I meant. BTW, whats the question?

**adzzzz** · Dec 24th, 2002, 04:38 PM

Originally posted by Shawn N
Use -o to show the process ID of the connection's owner. Then you can use Task Manager to end the app.

i meant where does the -o flag come into play? xp/2k? another version of netstat?

**Shawn N** · Dec 24th, 2002, 05:43 PM

Well, I'm on XP. I don't know if it's possible to use XP's version of netstat on a different Windows version.

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