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Port Forwarding Problem

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Port Forwarding Problem

I am running a webserver on my laptop and want to make it publicly accessible. The webserver is running on port 3000 and I have set up port forwarding on my router (Buffalo WBR-G54) to forward port 3000 from my static, external IP to port 3000 on my laptop which has a static IP on my network. I have also opened up that port on my laptop's software firewall.

However, when I hit http://<my external ip>:3000 my browser times out and says it cannot reach http://<my external ip> -- though when I hit port 80 at that IP I get the logon screen for my Buffalo router.

A friend elsewhere cannot reach my external IP at all, and when he tries to ping that IP it times out. I can ping that IP fine.

As best as I can tell, my laptop and router are correctly configured for port forwarding. I have configured my Buffalo router as per the instructions here:

Link

Any ideas what's going on and why can I not hit http://<my external ip>:3000 and see the webserver on my laptop?

I would greatly appreciate any help.

Thanks,
Andy Stewart



[Moderator's note by James - (sallyandjames): Shortened URL as it was stretching the page.]
11 REPLIES
Community Veteran
Posts: 1,229
Thanks: 1
Registered: 30-07-2007

Port Forwarding Problem

airblade? vortex? if that's you, then i can get there ... have you changed something?
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Port Forwarding Problem

Yes, that's me.

I'm not sure what I changed because I've been tinkering with all sorts of settings for the past couple of hours.

I can't reach it myself from my own laptop but presumably that's because my router doesn't like connections starting and ending in the same place.

Strangely, though, the webservice which I am trying to get to POST data to my app can't see it.

However, I am encouraged that you can.

Thanks for helping me out,
Andy
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Port Forwarding Problem

What URL are you using?

Thanks again,
Andy
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Port Forwarding Problem

Just to add two points:

1) Yip - looks like its working from here too.

2) You know you don't have to use your IP address - you can also use http://username.plus.com:3000
(the www. resolves to your webspace, without it, it goes to your static IP instead by default - you may know this already though)
Community Veteran
Posts: 1,229
Thanks: 1
Registered: 30-07-2007

Port Forwarding Problem

i couldn't get http://www.powderblue.plus.com:3000 to work, so i nslookup-ed powderblue.plus.com to get your static ip and then entered it directly into my browser, which did work.
i'm using OpenDNS btw rather than PN DNS
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Port Forwarding Problem

Hmm, interesting.

Thank you for having a look as well. I appreciate it.

I'm glad it's working for you -- it's hard for me to test when (I believe) my router won't let me look at my own external IP.

Thanks for the tip about using my username in the URL. I didn't know about the www. resolving to my webspace, but I'll bear that in mind.

I guess I have everything configured correctly now, so time to go back to this web service which says it can't contact me....

Thanks again for your help,
Andy
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Port Forwarding Problem

For testing, you could use a proxy server, such as www.hidemyass.com (not a recommendation, just one that I can remember - it seems to work fine though)

You get an explorer window, which opens web pages within a frame from a different IP to yours. At least then you should be able to check everything looks as it ought to.
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Port Forwarding Problem

James,

That's a useful tip, thank you. I didn't know about this kind of proxy server.

I just need to figure out why some people here can see the site, but a couple of other friends of mine cannot see it (at the same time as you can).

Any ideas?
Andy
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Port Forwarding Problem

Well, I just typed http://powderblue.plus.com:3000 into my address bar, and hey presto - found out you can't windsurf too well. Wink

(I had one lesson - it was the turning that scared me, got out to sea, then wasn't sure how to get back Shockedops: - anyhow I digress..)

I presume they are using the correct URL (IP or text), and including the colon and port number?
You could go to www.tinyurl.com and enter the shortcut in there, then give them the shortened URL to try, could help avoid typo's.

Other than that, not too sure - I'm far from knowledgeable on these things.

Fortunately lots of folks are that come in here so you'll likely get some useful advice rather than my ramblings!
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Port Forwarding Problem

Indeed -- turning around is a problem! Especially when heading out to sea.

I've been emailing the link to the friends who can't see the site, so no danger of them mistyping (I double-checked my typing in the email too :-)

Thanks for all your help. I really appreciate it.
Andy
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Port Forwarding Problem

No worries, just sorry I can't be more helpful!