Finding Port Conflicts

**MartinLiss** · Sep 30th, 2003, 09:12 AM

How would I go about looking for port conflicts on my XP system?

**parksie** · Oct 2nd, 2003, 05:25 AM

Port conflicts? As in, two programs trying to listen on the same port?

**VisionIT** · Oct 2nd, 2003, 05:40 AM

Originally posted by parksie
Port conflicts? As in, two programs trying to listen on the same port?

Is that even possible?

Are we talking COM/LPT ports? Or shall we guess and answer the first thing we think of!

**Pirate** · Oct 2nd, 2003, 06:01 AM

Originally posted by MartinLiss
How would I go about looking for port conflicts on my XP system?

Right click 'MyComputer' ---->Manage-------> Device Manager----->View 'menu'------>Resource by connection------->Interrupt Request----> then you are able to figure things out .

**MartinLiss** · Oct 2nd, 2003, 10:29 AM

Originally posted by parksie
Port conflicts? As in, two programs trying to listen on the same port?

I am trying to use a POP3 program to intercept my AOL mail so that I can use Outlook. When I try to send mail the POP3 program is throwing an error saying that it can't communicate with my SMTP port. The POP3 support person says that one reason for my problem is that some other program might be using the port that it wants to use. That port number is 25 and it was also suggested I use port 2525. (I know nothing about ports. How does one determine what ports are available and which can be used for what purposes?)

**MartinLiss** · Oct 2nd, 2003, 10:30 AM

Originally posted by Pirate
Right click 'MyComputer' ---->Manage-------> Device Manager----->View 'menu'------>Resource by connection------->Interrupt Request----> then you are able to figure things out .

I'll try that, thanks.

**MartinLiss** · Oct 2nd, 2003, 10:33 AM

Pirate, I just tried that and it doesn't show the ports that I'm interested in like 25, 2525, 110 and 111. It only shows ISA and PCI interrupt requests.

**Pirate** · Oct 2nd, 2003, 10:40 AM

lol sorry I took it you are looking for modem or so conflicts .

**Pirate** · Oct 2nd, 2003, 10:59 AM

Originally posted by MartinLiss
I know nothing about ports. How does one determine what ports are available and which can be used for what purposes?

Use this little tool that detects whether a specific port number is available or not . http://download.com.com/3000-2381-10...ml?tag=lst-0-1

**papacorn** · Oct 2nd, 2003, 01:01 PM

I doubt there IS a conflict.....perhaps it just needs to be remapped around 110 & 25...This may help http://www.analogx.com/contents/down...rk/pmapper.htm ....I thought AOL email used a different protocol through their own browser ? Good luck on this one. Please post back if you get this resolved !!!

**MartinLiss** · Oct 2nd, 2003, 04:20 PM

Originally posted by papacorn
I doubt there IS a conflict.....perhaps it just needs to be remapped around 110 & 25...This may help http://www.analogx.com/contents/down...rk/pmapper.htm ....I thought AOL email used a different protocol through their own browser ? Good luck on this one. Please post back if you get this resolved !!!

Tech support for my POP3 program suggested trying 111 and 2525 instead of 110 and 25. The mysterious thing about my problem is that I can sometimes get it to work and it continues to work until for some other reason I have to reboot. After rebooting it no longer works! Where do the numbers 111 and 2525 come from?

**papacorn** · Oct 2nd, 2003, 04:36 PM

I am not a fan of AOL and discourage is use whenever possible, The customers I have that insist on it are the ones that call the most with problems. I dont even think that the folks on the AOL help desk can help.

I have run AOL through proxies successfully for a day or two, then "All of the sudden" it wont work. AOL has no answers. But I do have a solution

....Where were we....Oh yeah, what do you mean by "Where do the numbers 111 and 2525 come from" ?

**MartinLiss** · Oct 2nd, 2003, 04:53 PM

What I mean is this. When the tech support people found that 110 and 25 were not working as ports for the POP3 tool they suggested 111 and 2525. I know of course they did not pull those numbers out of thin air and that there must be a finite set of ports available for my PC. How can I find out what those numbers are?

**papacorn** · Oct 2nd, 2003, 06:55 PM

Marty.....

What progy is this ? I know that port 111(TCP) & (UDP) is for SUN RPC and is very hackable.... Port 2525 is V-World (?) I imagine they just pulled these numbers out of their butts. I am sure whatever ports you program the program to use it will open up and use.

**MartinLiss** · Oct 2nd, 2003, 07:13 PM

The tool I am using is AOL2Pop. It intercepts AOL email (to and from) so that I (theoretically

) can use Outlook. By default AOL2Pop uses 110 for its POP3 server port number and 25 for its SMTP server port and when those didn't work they suggested I use 111 and 2525.

I'm not worried about hacking. I use McAfee Personal Filewall Plus and it protects me. BTW, I have it set so that AOL2Pop has full access to and from the internet.

**parksie** · Oct 3rd, 2003, 02:36 AM

What most likely happens is that AOL2POP is acting as both POP3 server and SMTP server, and is *listening* on local ports 25 (SMTP) and 110 (POP3). In Outlook, you then put localhost as your POP3 and SMTP servers, right?

If it gets confused, it could die or somehow leave itself behind still listening *shrugs*

**MartinLiss** · Oct 3rd, 2003, 09:18 AM

Originally posted by parksie
What most likely happens is that AOL2POP is acting as both POP3 server and SMTP server, and is *listening* on local ports 25 (SMTP) and 110 (POP3). In Outlook, you then put localhost as your POP3 and SMTP servers, right?

If it gets confused, it could die or somehow leave itself behind still listening *shrugs*

Yes, I use "localhost". What can be done about any possible confusion? I've turned it off, rebooted, etc. to no avail.

**papacorn** · Oct 3rd, 2003, 11:42 AM

Marty...
I downloaded the trial version and installed it....I used a ficticious name, I received no errors running it through Outlook and Outlook Express.

How are you accessing the internet (modem, cable, DSL) ? Also are you opening the AOL browser and signing on when you get on the internet ?

**MartinLiss** · Oct 3rd, 2003, 11:51 AM

I use SBC (Pacific Bell) DSL.

"Also are you opening the AOL browser and signing on when you get on the internet ?" Why do you ask? AOL doesn't need to be running for AOL2Pop to work.

**papacorn** · Oct 3rd, 2003, 12:04 PM

True AOL does not have to be running to use AOL2POP, but some folks use a modem and/or AOL over cable or PPOE and have to open their AOL browser to access the internet....which may be the program "listening" to ports 25 and 110 causing errors.

Go into taskmanager, see whats running and shut down programs that may confict.

**DiGiTaIErRoR** · Oct 3rd, 2003, 12:59 PM

You can use Sygate firewall to see what programs are using what ports.

**MartinLiss** · Oct 3rd, 2003, 01:24 PM

Currently only VBF is running.

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