Question

Check computer if port is blocked, unblock it

Asked by: phileoca

How do i check my computer to see if port # 19638 is being blocked by an application or anything.
(it's not a router problem)
This port is mandatory for me to access the admin control panel on my website www.phileoca.com/admin

Thank you

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Asked On
2004-05-11 at 09:45:34ID20985582
Tags

port

,

check

,

blocked

Topic

Windows 2000 Operating System

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Answers

 

by: PeteLongPosted on 2004-05-11 at 09:53:14ID: 11042340

from command line type netstat -a this shows all listening ports :)

Finding out what Ports are open

TO find out what ports are open/exposed do the following

Start >Run >type "cmd" {enter}
At the command line type "netstat -a" {enter}

The list displayed shows "Listening ports" and established "Who is on the other end" connections to yout computer.

WARNING
This is a list of common Trojan/Backdoor Port numbers
http://www.sans.org/resources/idfaq/oddports.php


Who is listening? Use this syntax: netstat -an |find /i "listening"
Save who is listening to a text file: netstat -an |find /i "listening" > c:\openports.txt
Who is established? Use this syntax: netstat -an |find /i "established"


Note: In Windows XP, you can type NETSTAT -O to get a list of all the owning process ID associated with each connection: netstat -ao |find /i "listening"


*****Pulist*****

You can use PULIST from the W2K Resource Kit to find the PID and see what process uses it and who started it. For example, you found out that your computer had an open connection to a remote IP address on TCP port 80, and you don't have any Internet Explorer or other browser windows open. You want to find out what process is using that session.
Download: http://www.microsoft.com/windows2000/techinfo/reskit/tools/existing/pulist-o.asp


*****Links*****

Port Assignments for Commonly-Used Services
http://www.microsoft.com/windows2000/techinfo/reskit/samplechapters/cnfc/cnfc_por_simw.asp

TCP/UDP Ports Used By Exchange 2000 Server
http://support.microsoft.com/default.aspx?scid=kb;en-us;278339

Nice shiny Port List :0)
http://hackerwhacker.com/portslist.html

http://www.incubus.co.uk/os/windows/netstat.htm
http://www.petri.co.il/quickly_find_local_open_ports.htm

*****Portscan Software*****

Run Fport from Foundstone:
http://www.foundstone.com/resources/proddesc/fport.htm
It will tell you what .EXE has the ports open. You can take appropriate actions

Monitor what port is doing what with Active Ports.
http://www.protect-me.com/freeware.html

Scan Yourself (Free)

Scan your Ports with Port Detective: lets you scan your PC ports to see which are open, in use, or blocked. This will help you find out how vulnerable your system is to hackers, and will also let you know which ports you can use for applications such as Web servers
http://www.portdetective.com/

Scan Remote COmputers (Free)

Advanced port scanner is a small, fast, robust and easy-to use port scanner for Win32 platform. It uses a multithread technique, so on fast machines you can scan ports very fast. Also, it contains descriptions for common ports, and can perform scans on predefined port ranges. You can use it for FREE. Download now!
http://www.antivirus.com.au/radmin/famatech_nu/portscanner.htm

 

by: phileocaPosted on 2004-05-11 at 10:21:15ID: 11042653

i'd like to use the portdetective utility, but the site appears to not be responding.

If u can download it or, or if u have a copy, can u email it to me and then reply here that u sent it to me?

phileoca
<at>
phileoca.
<dot>
com

 

by: PeteLongPosted on 2004-05-11 at 10:28:09ID: 11042722

 

by: phileocaPosted on 2004-05-11 at 11:05:58ID: 11043126

WOOT.

Scanned Port 19638 ---> BLocked

Now for part 2 of the question, how do i unblock it? ^^

 

by: JammyPakPosted on 2004-05-11 at 11:08:36ID: 11043161

is it blocked, or is there just no service listening on that port?

 

by: phileocaPosted on 2004-05-11 at 11:12:50ID: 11043196

says it's blocked

 

by: PeteLongPosted on 2004-05-11 at 11:32:33ID: 11043374

I agree with JP I dont think its blocked theres just no application listening on that port :)

 

by: phileocaPosted on 2004-05-11 at 11:33:19ID: 11043378

the utility u gave me, returned that the port is blocked.

 

by: PeteLongPosted on 2004-05-11 at 11:36:23ID: 11043394

I know you are trying to access your website, Im curious what to do?

 

by: phileocaPosted on 2004-05-11 at 11:40:22ID: 11043426

www.phileoca.com/admin is the login page for my website so that i can do stuff say,, check bandwidth, add users, filter mail, file manager, analog reports, etc.etc.

it worked before on my home pc.  Now, it doesn't work, and it's very irritating.

The utility returned to me that the port was blocked.  I need that port open.  Somewhere it's blocked, somewhere it needs to be opened.  I just have no idea, and the question hasn't come up before in EE (with an  accepted answer anyway)

 

by: PeteLongPosted on 2004-05-11 at 11:42:25ID: 11043440

Why is it sending me a digital certificate? is that your problem????

 

by: phileocaPosted on 2004-05-11 at 11:47:53ID: 11043494

cause my site isn't verisigned, and i dont 'NEED' to get it verisigned.

I reinstalled my certificates, that did not fix the problem
web host said i need port 19638 open.  Believe me, we've checked every single possible corner, and it all comes down to this port being blocked on my PC

 

by: phileocaPosted on 2004-05-11 at 11:48:46ID: 11043505

i been reading on the MS KB, but i dont understand how this would permit me to "grant access" to the port
http://support.microsoft.com/default.aspx?scid=kb;en-us;811832&Product=win2000

 

by: phileocaPosted on 2004-05-11 at 12:00:03ID: 11043586

 

by: rhrowsonPosted on 2004-05-11 at 12:00:43ID: 11043590

IS there a firewall between you and the server. If so, check which ports are open here. The port you specify I wouldn't expect to be open

 

by: phileocaPosted on 2004-05-11 at 12:30:48ID: 11043809

no firewall.

 

by: phileocaPosted on 2004-05-11 at 12:33:43ID: 11043840

furthemore, i do use zone alarm (and even with it disabled, the site still doesn't work).  in the firewall setup of zone alarm, i gave access to the site.  Still not working. My site requires port 19638.

 

by: rhrowsonPosted on 2004-05-11 at 12:35:32ID: 11043863

Are you sure Zone Alarm is not blocking the outgoing port? Are you trying to connect by http to this port, or another protocol? Have you tried with a different machine that is not running Zone Alarm

 

by: phileocaPosted on 2004-05-11 at 12:45:07ID: 11043969

If u wanna see what else has been done that is kind of relating to this problem:
http://www.experts-exchange.com/Operating_Systems/Win2000/Q_20984141.html

-yes i've tried with other PC's works fine
-Yes i've disables ZA, still problem.

 

by: rhrowsonPosted on 2004-05-11 at 12:46:58ID: 11043989

Does ZA generate logs to tell you what is being passed and dropped?

 

by: phileocaPosted on 2004-05-11 at 14:23:34ID: 11044824

kind of.  Not everything.  Already check logs regarding port 19638

I'm really considering moving all documents and files i want to save to my F drive (serial STS)
then formating my C drive, reinstalling windows and apps.   i'm on the verge of destruction

/equip "PC" both hands
/wait 1
/climb tower
/wait 1
/launch
/emote Watches PC make a crater type hole in ground.

^^

 

by: ewtaylorPosted on 2004-05-11 at 16:06:28ID: 11045456

Do you have any vpn clients installed? Sometimes they install a firewall.

 

by: phileocaPosted on 2004-05-12 at 08:45:17ID: 11051207

vpn, hmm, i'll check my network this evening.  Good idea. =)  Keep em coming.

 

by: ewtaylorPosted on 2004-05-12 at 08:55:42ID: 11051325

Your computer is multihomed or single nic?

 

by: phileocaPosted on 2004-05-12 at 11:40:22ID: 11052739

multihomed??? whats that? ^^

My network card is imbedded in the motherboard. Network works, internet works.  port 19638... boo hoo.

 

by: ewtaylorPosted on 2004-05-12 at 12:13:49ID: 11053019

Sorry does it have multiple network cards?

 

by: phileocaPosted on 2004-05-12 at 13:36:56ID: 11053710

nope. just the one.

 

by: ewtaylorPosted on 2004-05-12 at 13:41:01ID: 11053742

Try uninstalling zonealarm I have seen issues where even disabled it has caused problems with certain ports.

 

by: phileocaPosted on 2004-05-13 at 08:21:40ID: 11060090

formatted my drive.
Now i get to deal with the joys of  trying to get all the drivers installed.
win2k

 

by: PeteLongPosted on 2004-05-13 at 12:14:00ID: 11062384

ThanQ

20120131-EE-VQP-002

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