Open port

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

Open port

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??
Dec 23rd, 2002, 04:52 PM
killerSD

Goto your Command Prompt
type netstat -a

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

Hope that helps...
Dec 23rd, 2002, 04:57 PM
Mc Brain

Ok... and what does this mean:

Code:

Proto Local Address Remote Address State TCP one:ftp one:0 LISTENING
Dec 23rd, 2002, 05:01 PM
killerSD

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 :D
Dec 23rd, 2002, 05:01 PM
Shawn N

Use -o to show the process ID of the connection's owner. Then you can use Task Manager to end the app.
Dec 23rd, 2002, 05:04 PM
Mc Brain

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

WOW....:eek:

Do you have a firewall???
You really should think about one if oyu dont!!! :cool:
Dec 23rd, 2002, 05:09 PM
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.
Dec 23rd, 2002, 05:13 PM
Mc Brain

Quote:

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.
Dec 23rd, 2002, 05:15 PM
Mc Brain

Quote:

Originally posted by killerSD
WOW....:eek:

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

I do have a firewall... but most of the connections remote addresses seem to be my computer :confused:
Dec 23rd, 2002, 05:26 PM
killerSD

Quote:

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!
Dec 23rd, 2002, 05:30 PM
Mc Brain

How do you close a connection?
Dec 23rd, 2002, 05:41 PM
killerSD

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. :D
Dec 23rd, 2002, 05:50 PM
Shawn N

Get ZoneAlarm. It's free and will tell you what programs are trying to do.
Dec 23rd, 2002, 05:53 PM
killerSD

He is right... Zonealarm is Awesome! I use it and it is amazing. :)
Dec 23rd, 2002, 05:57 PM
Mc Brain

I will... althought I'm afraid that it start messing things up with Norton's. Anyway... how do you close a connection?
Dec 23rd, 2002, 05:59 PM
Shawn N

I don't know of any simple way to close another processes connection other than using ZoneAlarm.
Dec 23rd, 2002, 06:13 PM
Mc Brain

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??
Dec 23rd, 2002, 06:31 PM
Shawn N

McBrain that's not even a connection. That's just showing that your computer is listening on that port, waiting for a connection.
Dec 23rd, 2002, 06:40 PM
Mc Brain

Thanks!! I've realized that already. And found that Windows' FTP service should be stopped to get that port free.
Dec 23rd, 2002, 07:13 PM
drew_1790

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..:D
Dec 23rd, 2002, 07:15 PM
Shawn N

You can close another processes connection, it's just not as simple as showing an input box. ZoneAlarm does it.
Dec 23rd, 2002, 07:20 PM
drew_1790

doesnt zonealarm simply disalow the application to send and establish a connection?
Dec 23rd, 2002, 07:25 PM
Shawn N

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.
Dec 23rd, 2002, 09:40 PM
adzzzz

is netstat -o only available on xp? because im on 2k and it just brings up the netstat help when i try it :D
Dec 24th, 2002, 04:44 AM
mxnmx

Quote:

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

I don't have the -o option on W2K.
Dec 24th, 2002, 05:24 AM
mxnmx

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?
Dec 24th, 2002, 04:38 PM
adzzzz

Quote:

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?
Dec 24th, 2002, 05:43 PM
Shawn N

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.