[the_elementary]

Well since two days i have this problem.
We're 9 on a connection on a linksys WGA200G modem/router
Everything worked fine till two days ago.
Now whenever one of my roommates connects himselfto the network, no-one has internet (excepted sometimes himself).This happens almost immediately.
When it happens no-one can even connect to the modem (using http://192.168.1.1, it just says "unable to make connection")
When i go check the router all green lights are ok, excepted the internet one.(which is turned off)
The weird thing is that even if im wired to the modem, i cant connect to it and my computer doesnt detect a connection.
My only way out till now is cutting the power of the modem and then re-power it!

Problem is, the guy doesnt want to believe he is deconnecting everyone. (i'm 99% percent sure it's him making the network fail) so i cant expect much of his help.
The only thing (i see) that could be part of the problem is that he is running on a mac computer, while everyone else uses windows.
(the problem occurs both if he's wired or when he connects himself wireless)

I tried updating the firmware, but it didnt chqnge the problem at all...
I really dont know how i could solve this! so if anyone knows, thx for the help!

Sorry for the long "text", i hope i explained it clear enough.
Thanks in advance for the help

I'll be back in arround 5 hours so don't expect a too quick reply of me if you need some precisions, but quick help would be very nice!

[JohnWill]

Truthfully, I think someone has plugged the modem into one of the router LAN connections instead of the router's WAN connection. Nothing he could do with a Mac would do what you're describing.


Let's see this from a connected Windows computer. when he's not connected.

Hold the Windows key and press R, then type CMD to open a command prompt:

In the command prompt window that opens, type type the following command:

Note that there is a space before the /ALL, but there is NOT a space after the / in the following command.

IPCONFIG /ALL

Right click in the command window and choose Select All, then hit Enter to copy the contents to the clipboard.
Paste the results in a message here.

If you are on a machine with no network connection, use a floppy, USB disk, or a CD-RW disk to transfer a text file with the information to allow pasting it here.

[the_elementary]

you might want to think i'm a "noob" as i see how you talk to me (nothing wrong with that)
In fact i do know quiet a lot about computers, and a little bit about networks.
But as this problem appeared verry strange to me i decided to post it here!

- The device is a wifi-router/modem from linksys (WGA200G)
- When the problem happens, NO-ONE cant connect to it! (so i have to unplug it, it's the only way to do it as i can't access the device by normal means to hard/soft reboot it)
- I am connected with a cable to the router, most of my roommates are with wifi, but the problem is still the same for all of us.
- I also think it's weird the mac is doing that, but or he has strange things on his computer, or the router/modem is broken. (but then why does it only fail with him?)

here is the ipconfig result (dunno how it's gonna help you )

Sorry, my conputer is configured in french, but i don't think it should be a problem.

Configuration IP de Windows

Nom de l'hôte . . . . . . . . . . : CENSORED
Suffixe DNS principal . . . . . . :
Type de noud . . . . . . . . . . : Hybride
Routage IP activé . . . . . . . . : Non
Proxy WINS activé . . . . . . . . : Non

Carte Ethernet Connexion au réseau local:

Suffixe DNS propre à la connexion :
Description . . . . . . . . . . . : Realtek RTL8139/810x Family Fast Eth
ernet NIC
Adresse physique . . . . . . . . .: 00-16-EC-45-FF-A6
DHCP activé. . . . . . . . . . . : Oui
Configuration automatique activée . . . . : Oui
Adresse IP. . . . . . . . .*. . . : 192.168.1.101
Masque de sous-réseau . . .*. . . : 255.255.255.0
Passerelle par défaut . . .*. . . : 192.168.1.1
Serveur DHCP. . . . . . . . . . . : 192.168.1.1
Serveurs DNS . . . . . . . . . . : 192.168.1.1
Bail obtenu . . . . . . . .*. . . : lundi 27 octobre 2008 13:15:25
Bail expirant . . . . . . .*. . . : mardi 28 octobre 2008 13:15:25

Carte Tunnel Teredo Tunneling Pseudo-Interface :

Suffixe DNS propre à la connexion :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Adresse physique . . . . . . . . .: FF-FF-FF-FF-FF-FF-FF-FF
DHCP activé. . . . . . . . . . . : Non
Adresse IP. . . . . . . . .*. . . : fe80::ffff:ffff:fffd%4
Passerelle par défaut . . .*. . . :
NetBIOS sur TCPIP. . . . . . . . : Désactivé

Carte Tunnel Automatic Tunneling Pseudo-Interface :

Suffixe DNS propre à la connexion :
Description . . . . . . . . . . . : Automatic Tunneling Pseudo-Interface

Adresse physique . . . . . . . . .: C0-A8-01-65
DHCP activé. . . . . . . . . . . : Non
Adresse IP. . . . . . . . .*. . . : fe80::5efe:192.168.1.101%2
Passerelle par défaut . . .*. . . :
Serveurs DNS . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS sur TCPIP. . . . . . . . : Désactivé

[JohnWill]

Given the new information that it's a one piece unit, I suspect the unit has some sort of problem.

I think my first attempt would be to upgrade the firmware to the latest available from the manufacturer, then reset to factory defaults and reconfigure the router.

[the_elementary]

I did upgrade the firmwire, reset to factory and reconfigure the router; nothing helped

I also contacted the online linksys support, the only thing they told me was to change some wireless settings (as if that would change anything, because when there are only wired computers this also happens) I tried it and as i expected, it didn't help.
So, i'm still left with this problem!

I'm also suspecting the unit to have some problems, but i want to be sure before returning it!

ps. I know it's weird, but the problem seems to happen only when one of our roommates connects himself to the internet...

[JohnWill]

Try these simple tests.

Hold the Windows key and press R, then type CMD (COMMAND for W98/WME) to open a command prompt:

In the command prompt window that opens, type type the following commands one at a time, followed by the Enter key:

IPCONFIG /ALL

PING <computer_IP_address>

PING <default_gateway_address>

PING 206.190.60.37

PING yahoo.com

Right click in the command window and choose Select All, then hit Enter to copy the contents to the clipboard.
Paste the results in a message here.

<computer_IP_address> - The IP Address of your computer, obtained from the IPCONFIG command above.

<default_gateway_address> - The IP address of the Default Gateway, obtained from the IPCONFIG command above.

If you are on a machine with no network connection, use a floppy, USB disk, or a CD-RW disk to transfer a text file with the information to allow pasting it here.

[the_elementary]

I made those ping right now, they are quite high, but that's because we're 9 on a single line and some of them are DLding stuff.
i can make those pings again late tonight if you desire they will be a lot lower then now!

Ofcourse when the problem happens i can't ping anything at all, as the modem/router doesnt respond


Microsoft Windows XP [version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\HP_Propriétaire>ping 192.168.1.101

Envoi d'une requête 'ping' sur 192.168.1.101 avec 32 octets de données*:

Réponse de 192.168.1.101*: octets=32 temps<1ms TTL=128
Réponse de 192.168.1.101*: octets=32 temps<1ms TTL=128
Réponse de 192.168.1.101*: octets=32 temps<1ms TTL=128
Réponse de 192.168.1.101*: octets=32 temps<1ms TTL=128

Statistiques Ping pour 192.168.1.101:
Paquets*: envoyés = 4, reçus = 4, perdus = 0 (perte 0%),
Durée approximative des boucles en millisecondes :
Minimum = 0ms, Maximum = 0ms, Moyenne = 0ms

C:\Documents and Settings\HP_Propriétaire>ping 192.168.1.1

Envoi d'une requête 'ping' sur 192.168.1.1 avec 32 octets de données*:

Réponse de 192.168.1.1*: octets=32 temps<1ms TTL=255
Réponse de 192.168.1.1*: octets=32 temps<1ms TTL=255
Réponse de 192.168.1.1*: octets=32 temps<1ms TTL=255
Réponse de 192.168.1.1*: octets=32 temps<1ms TTL=255

Statistiques Ping pour 192.168.1.1:
Paquets*: envoyés = 4, reçus = 4, perdus = 0 (perte 0%),
Durée approximative des boucles en millisecondes :
Minimum = 0ms, Maximum = 0ms, Moyenne = 0ms

C:\Documents and Settings\HP_Propriétaire>ping 206.190.60.37

Envoi d'une requête 'ping' sur 206.190.60.37 avec 32 octets de données*:

Réponse de 206.190.60.37*: octets=32 temps=1023 ms TTL=55
Réponse de 206.190.60.37*: octets=32 temps=790 ms TTL=55
Réponse de 206.190.60.37*: octets=32 temps=206 ms TTL=55
Réponse de 206.190.60.37*: octets=32 temps=136 ms TTL=55

Statistiques Ping pour 206.190.60.37:
Paquets*: envoyés = 4, reçus = 4, perdus = 0 (perte 0%),
Durée approximative des boucles en millisecondes :
Minimum = 136ms, Maximum = 1023ms, Moyenne = 538ms

C:\Documents and Settings\HP_Propriétaire>ping yahoo.com

Envoi d'une requête 'ping' sur yahoo.com [206.190.60.37] avec 32 octets de donné
es*:

Réponse de 206.190.60.37*: octets=32 temps=655 ms TTL=55
Réponse de 206.190.60.37*: octets=32 temps=222 ms TTL=55
Réponse de 206.190.60.37*: octets=32 temps=142 ms TTL=55
Réponse de 206.190.60.37*: octets=32 temps=521 ms TTL=55

Statistiques Ping pour 206.190.60.37:
Paquets*: envoyés = 4, reçus = 4, perdus = 0 (perte 0%),
Durée approximative des boucles en millisecondes :
Minimum = 142ms, Maximum = 655ms, Moyenne = 385ms

C:\Documents and Settings\HP_Propriétaire>

[the_elementary]

Bug happened again so pinged during it
here is the result:

C:\Documents and Settings\HP_Propriétaire>ping 192.168.1.101

Envoi d'une requête 'ping' sur 192.168.1.101 avec 32 octets de données*:

Réponse de 192.168.1.101*: octets=32 temps<1ms TTL=128
Réponse de 192.168.1.101*: octets=32 temps<1ms TTL=128
Réponse de 192.168.1.101*: octets=32 temps<1ms TTL=128
Réponse de 192.168.1.101*: octets=32 temps<1ms TTL=128

Statistiques Ping pour 192.168.1.101:
Paquets*: envoyés = 4, reçus = 4, perdus = 0 (perte 0%),
Durée approximative des boucles en millisecondes :
Minimum = 0ms, Maximum = 0ms, Moyenne = 0ms

C:\Documents and Settings\HP_Propriétaire>ping 192.168.1.1

Envoi d'une requête 'ping' sur 192.168.1.1 avec 32 octets de données*:

Délai d'attente de la demande dépassé.
Délai d'attente de la demande dépassé.
Délai d'attente de la demande dépassé.
Délai d'attente de la demande dépassé.

Statistiques Ping pour 192.168.1.1:
Paquets*: envoyés = 4, reçus = 0, perdus = 4 (perte 100%),

[JohnWill]

Now, if you could only translate some of that.

[the_elementary]

Some french lessons for you then:

Envoi d'une requête 'ping' sur 192.168.1.101 avec 32 octets de données*:
= Pinging 192.168.1.1 with 32 bytes of data

Réponse de 192.168.1.101*: octets=32 temps<1ms TTL=128
= reply from 192.168.1.101: bytes=32 time<1ms TTL=128

Paquets*: envoyés = 4, reçus = 4, perdus = 0 (perte 0%)
= Packets: sent=4, recieved = 4, lost= 0 (0% loss)

Durée approximative des boucles en millisecondes :
= Approximate round trip times in milli-seconds:

Minimum = 0ms, Maximum = 0ms, Moyenne = 0ms
= Minimum = 0ms, Maximum = 0ms, Average = 0ms

Délai d'attente de la demande dépassé.
= Timeout

Normally you should be able to understand everything with this ;p
thanks for your help till now tough!

[JohnWill]

This sure seems to be something about the router, you shouldn't be able to block other people like that by just connecting.

My next step would be a new router.

[the_elementary]

Thing is i dont have another one and i dont want to buy another one! ;p
No-one else has an explanation for this?