Viewing IP addresses behind router

linuxrunner · 02-16-2006, 10:49 PM

This problem isn't really a big deal, but just want to know how to fix it. I have a web server on one of my machines, ip address is say 192.168.0.8. All port 80 traffic is set to be forwarded by router to this address. Works great, except when i type the complete name of the website in when i am on my network, i get the config page for the router/modem. So i when i am using another computer on my network i have to type 192.168.0.8 for it to work. Outside of the network the site works fine. Any idea how to tell to router to forward to 192.168.0.2 and not display setup screen, but still be able to access set up screen when I type in say 192.168.0.5?

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photoleif · 02-16-2006, 10:54 PM

is your DNS daemon running?

linuxrunner · 02-16-2006, 11:03 PM

Yes, DNS works fine. For some reason when I request the site from behind the router it goes out to the DNS server and then comes back and the router looks and finds that it came from "it" and it’s destination is “it” so directs it to the config page. But will forward all port 80 requests that originated from the "outside" Let me know if this is not how it works, it is just my understanding.

photoleif · 02-17-2006, 12:28 AM

edit: definitely ALL port 80 traffic, or just incoming?

still sounds a little goofed up. give these tests a try... it may reveal what's going on.

1) ping a known, public IP address like 4.2.2.4 (a big DNS server) - fails, network issue; works, goto 2
2) ping its name (vnsc-pri-dsl.genuity.net) - fails, DNS issue; works, goto 3
3) ping IP of a known, public www server like google (66.102.7.104) - fails, possible routing issue; works, goto 4
4) ping google by name (www.google.com) - fails, possible routing issue per 3; works, goto 5
5) try to http-access google via its IP (http://66.102.7.104) - fails, possible router blockage of port 80; works, goto 6
6) http-access google via URL - fails, possible cache corruption (flush and retry), hosts redirect, etc; works, go be happy.

you might also try a tracert to 4.2.2.4 to see just where it goes. i'd expect a couple hops in your net, then right out to your ISP and beyond. too bad there's no portwise ping.

linuxrunner · 02-17-2006, 09:45 AM

Quote:

Originally Posted by photoleif

edit: definitely ALL port 80 traffic, or just incoming?

still sounds a little goofed up. give these tests a try... it may reveal what's going on.

1) ping a known, public IP address like 4.2.2.4 (a big DNS server) - fails, network issue; works, goto 2
2) ping its name (vnsc-pri-dsl.genuity.net) - fails, DNS issue; works, goto 3
3) ping IP of a known, public www server like google (66.102.7.104) - fails, possible routing issue; works, goto 4
4) ping google by name (www.google.com) - fails, possible routing issue per 3; works, goto 5
5) try to http-access google via its IP (http://66.102.7.104) - fails, possible router blockage of port 80; works, goto 6
6) http-access google via URL - fails, possible cache corruption (flush and retry), hosts redirect, etc; works, go be happy.

you might also try a tracert to 4.2.2.4 to see just where it goes. i'd expect a couple hops in your net, then right out to your ISP and beyond. too bad there's no portwise ping.

All steps ping right through, and all my other internet works great, i only get the config page when i type the ip address of the modem/router or when i type my website or even if i enter it in the form of it's ip address... like 259.188... so on. But if i enter the ip address of the machine hosting apache like 192.168.4 then the site comes right up. Site always works great when accessing it from anyware but behind my router.

photoleif · 02-17-2006, 02:14 PM

OH. so let me see if i understand. if you try to access your *own* website (which is served off your machine), then that's when you get the router config page. other URLs from that machine *do* work ok? in that case, i think it could well be a DNS vs. cache vs. hosts kind of issue. remember the cycle of name resolution... and if your website has a public IP address, you'll need to try using that to test, too. if you hit it via its private IP then who knows what may happen. what do you get if you ping your URL? (not so much does it work, but rather which IP shows)?

**Tofer** · 02-17-2006, 02:25 PM

dont know if this will help or not but a great website is http://www.network-tools.com/ when you load the page it will show your internet IP address in the box as default.

it might be your router.. i dont have a webserver going, but playing around with my 2 computer networked on my wireless router. the only time i could get the router setup page is when i type 192.168.0.1, if i typed 192.168.0.100 it took me to this computer which i have muliple hard drives shared acting as a file server type thing. and 192.168.0.101 took me to my laptop. if i type 192.168.0.x (where x != 1,100, 101) it just sat there

WT · 02-17-2006, 05:45 PM

Some routers have something called remote configuration (managment) make sure thats not enabled on your router sounds like your hitting it when you use your outside address (WAN IP) from the inside. Just something to check.

linuxrunner · 02-18-2006, 11:25 PM

Remote management is off, but that is exactly what is happening, when i enter my WAN IP address from inside, whether in the form of the actual IP address or on the form of the website address which get's translated into IP. i get a config page. If i ping my WAN IP address it responds fine, and if i ping the machine address it also responds fine.

***midiwall*** · 02-19-2006, 01:16 AM

From your alias and other threads, can I/we assume that this is happening from a linux machine?

If not (ie, you're running Windows), then what happens after you clear your local DNS cache? (from a prompt type: ipconfig /flushdns).

And then, in either case, is it possible that you have a hosts file entry that's superceeding the actual IP resolution? (windows: \windows\system32\drivers\etc\hosts)

What router are you using? Any chance that yoou have it configured for server forwarding versus port forwarding?

linuxrunner · 02-26-2007, 10:23 AM

Quote:

Originally Posted by midiwall

From your alias and other threads, can I/we assume that this is happening from a linux machine?

If not (ie, you're running Windows), then what happens after you clear your local DNS cache? (from a prompt type: ipconfig /flushdns).

And then, in either case, is it possible that you have a hosts file entry that's superceeding the actual IP resolution? (windows: \windows\system32\drivers\etc\hosts)

What router are you using? Any chance that yoou have it configured for server forwarding versus port forwarding?

OLD THREAD REVIVIAL!!!

When i posted this thread it was on a linux server, but i am takeing iis classes now and i have to use server 2003, so it is now hosted on server 2003.

Still the same problem tho. I have kind of been able to get around it by editing the host file on the other machines on my network so when i type in the www.blahblah.com address it will redirect to the internial network address of the server. But if anybody has any ideas let me know.

Edit: my site is not blahblah.com!

02-16-2006, 10:54 PM	#2 (permalink)
photoleif Contributing Member Join Date: Jan 2005 Location: 39.995, 105.119 Posts: 643	is your DNS daemon running? __________________ '95 Xtra cab 3VZE SR5V6 \| 33x10.50-15 BFG AT/KOs \| 4" Superlift \| OME torsion bars \| Total Chaos idler arm and uniball \| Rancho steering stabilizer \| Smittybilt front & rear tubular bumpers \| Sportsman topper \| Aisin hubs \| Dual Optimas \| Extended diff breathers \| Custom center console sometime: rear locker some sometime: retire the IFS My truck page Photography: http://www.aspen-graphics.com

02-17-2006, 12:28 AM	#4 (permalink)
photoleif Contributing Member Join Date: Jan 2005 Location: 39.995, 105.119 Posts: 643	edit: definitely ALL port 80 traffic, or just incoming? still sounds a little goofed up. give these tests a try... it may reveal what's going on. 1) ping a known, public IP address like 4.2.2.4 (a big DNS server) - fails, network issue; works, goto 2 2) ping its name (vnsc-pri-dsl.genuity.net) - fails, DNS issue; works, goto 3 3) ping IP of a known, public www server like google (66.102.7.104) - fails, possible routing issue; works, goto 4 4) ping google by name (www.google.com) - fails, possible routing issue per 3; works, goto 5 5) try to http-access google via its IP (http://66.102.7.104) - fails, possible router blockage of port 80; works, goto 6 6) http-access google via URL - fails, possible cache corruption (flush and retry), hosts redirect, etc; works, go be happy. you might also try a tracert to 4.2.2.4 to see just where it goes. i'd expect a couple hops in your net, then right out to your ISP and beyond. too bad there's no portwise ping. __________________ '95 Xtra cab 3VZE SR5V6 \| 33x10.50-15 BFG AT/KOs \| 4" Superlift \| OME torsion bars \| Total Chaos idler arm and uniball \| Rancho steering stabilizer \| Smittybilt front & rear tubular bumpers \| Sportsman topper \| Aisin hubs \| Dual Optimas \| Extended diff breathers \| Custom center console sometime: rear locker some sometime: retire the IFS My truck page Photography: http://www.aspen-graphics.com Last edited by photoleif; 02-17-2006 at 12:32 AM.

02-17-2006, 02:14 PM	#6 (permalink)
photoleif Contributing Member Join Date: Jan 2005 Location: 39.995, 105.119 Posts: 643	OH. so let me see if i understand. if you try to access your own website (which is served off your machine), then that's when you get the router config page. other URLs from that machine do work ok? in that case, i think it could well be a DNS vs. cache vs. hosts kind of issue. remember the cycle of name resolution... and if your website has a public IP address, you'll need to try using that to test, too. if you hit it via its private IP then who knows what may happen. what do you get if you ping your URL? (not so much does it work, but rather which IP shows)? __________________ '95 Xtra cab 3VZE SR5V6 \| 33x10.50-15 BFG AT/KOs \| 4" Superlift \| OME torsion bars \| Total Chaos idler arm and uniball \| Rancho steering stabilizer \| Smittybilt front & rear tubular bumpers \| Sportsman topper \| Aisin hubs \| Dual Optimas \| Extended diff breathers \| Custom center console sometime: rear locker some sometime: retire the IFS My truck page Photography: http://www.aspen-graphics.com

02-17-2006, 02:25 PM	#7 (permalink)
Tofer Super Moderator Staff Join Date: Jul 2004 Location: Tacoma WA. Posts: 6,902	dont know if this will help or not but a great website is http://www.network-tools.com/ when you load the page it will show your internet IP address in the box as default. it might be your router.. i dont have a webserver going, but playing around with my 2 computer networked on my wireless router. the only time i could get the router setup page is when i type 192.168.0.1, if i typed 192.168.0.100 it took me to this computer which i have muliple hard drives shared acting as a file server type thing. and 192.168.0.101 took me to my laptop. if i type 192.168.0.x (where x != 1,100, 101) it just sat there __________________ 94 4runenr: all the good stuff....... 89 4runner: 3.0, Auto, 5.29 lockright f/r. 31x10.5 wildcountry ATs. 81 2wd pickup: 22R \| 5-sp \| long bed \|Civic SI seats \| LockRight \| Hella 500s pacific-crawlers.com For all your Trail-gear and HID lighting Solutions Needs check out yotaworks.com Online store coming soon :) Last edited by ToferUOP; 02-17-2006 at 02:31 PM.

02-17-2006, 05:45 PM	#8 (permalink)
WT Registered User Join Date: Apr 2003 Location: Virgina Posts: 721	Some routers have something called remote configuration (managment) make sure thats not enabled on your router sounds like your hitting it when you use your outside address (WAN IP) from the inside. Just something to check. __________________ 96 4Runner SR5 SC \| 3" Revtek Front/OME 891 Rear,Diff/Panhard Drop\|AirLift bags\|285/75/R16 Nitto Terra Grappler\|Eaqle 121 w/TRD Logo\|Bilsteins\|Cross-Drilled PS w/PF Pads\|Silver Reverse Gauges\|Custom Grill\|Catch-All Floor Mats\|Sylvania SilverStar\|Weather Tech Visors\|Clear Corner/Fronts\|Alpine MP3/WMA/CD\|99+Headlight/Console Mod\|K&N FIPK W/Drycharger\|Optima Redtop\|Trans-Cooler\|Remote Start\|PICS\|PICS2\| Last edited by WT; 02-17-2006 at 07:44 PM.

02-19-2006, 01:16 AM	#10 (permalink)
*midiwall* Sponsoring Member Join Date: Dec 2002 Location: Seattleish, WA Posts: 9,078	From your alias and other threads, can I/we assume that this is happening from a linux machine? If not (ie, you're running Windows), then what happens after you clear your local DNS cache? (from a prompt type: ipconfig /flushdns). And then, in either case, is it possible that you have a hosts file entry that's superceeding the actual IP resolution? (windows: \windows\system32\drivers\etc\hosts) What router are you using? Any chance that yoou have it configured for server forwarding versus port forwarding? __________________ ~ Mark '96 4Runner Limited S/C MI - 370cc injectors, Air! horns, Airaid MIT, ATS A-arms, 285/75/R16 BFG MTs, Bored TB, Brembo slotted, Cobra 75 WXST, Deckplate, Downey headers, Hayden cooler, IPT valve body, Level 10 torque convertor, Meanstreak exhaust, OME/OME rears, On-board PC (XM, Nav, WiFi, etc), Port 'n Polish, Remote Start, SAW fronts, Hilux console, SMT-5, Stubb's sliders, Supra MAF, TJM-17, 2.0" pulley, Viair 450c, Walbro 190, Weasy2k cams Last edited by midiwall; 02-19-2006 at 01:18 AM.

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