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a very peculiar problem!

N/A

a very peculiar problem!

recently i have been having a very strange problem on my home network, to save time i will quote the email i sent to plus.net support:

Quote
A peculiar problem has arisen over the past week or so. I will be surfing the internet without any problems when all of a sudden i get "cannot find server" errors from no matter which website I visit. The strange thing is that it seems to be just http that "dies". I can email, ftp, msn, aol, telnet, etc fine, even https:// websites work - I simply cannot visit any http sites.

Sometimes this problem will affect both computers on the home network, other times the server computer will be fine. I have tried clearing the cache, and using a different internet browser but with no luck.

It was suggested to me that I needed to add the DNS servers to the dial up connection - however this has not solved the problem. The only "solution" that I have found is to shut down both computers for at least an hour.

As I say this problem has only arisen over the past week or so, however i have not done anything to the network that should affect it. It also seems to happen completely randomly - sometimes I can surf for over an hour before it happens, but it has also happened after about 5 minutes of going online.

Some information that you may find useful:
Both computers on the home network use Windows XP and are connected via a hub.
I am using an Alcatel SpeedTouch 330 USB ASDL modem.

Any help/advice you can suggest on solving this problem will be most appreciated,


i received a reply this morning informing me that plus.net are doing some maintenance and that i should monitor the problem after the maintenance.

however, i have since started to become more certain that this problem is being caused on my network somehow. so when the problem happened again at lunch time i tried viewing a localhost website using apache, and alas it did not work. combined with the fact that other web services still work, and more often than not the server computer is fine.

i just find it so strange that this problem just appeared "out of the blue", but then i guess computers are strange.

~ dave
26 REPLIES
N/A

a very peculiar problem!

the first step is to see if you can connect using ip address. Try connecting to 212.159.8.137 which is the portal if this works and you cant get it by going to www.plus.net then it is a dns problem.

try setting your second dns to 194.119.131.66 and the first one to plusnets dns. When you get the error go to the netowk and swap the dns over so the primary and secondery are swaped and see if that solves it.

Make sure you dont have any firewalls setup which may cause the problem if you have disable them tempory. do us a ipconfig /all so we can see the settings.

Check there is nothing strange in the host file situataed in etc C:\WINDOWS\system32\drivers\etc.

Open task manmager and make sure your cpu isnt at 100% as this would stop dns working
michaelscott
Grafter
Posts: 594
Registered: 09-08-2007

a very peculiar problem!

Are you using ICS in Win XP?
N/A

a very peculiar problem!

thanks for your replies. i'm 100% sure that its a problem with my computer/network and has nothing to do with plus.net now.

it happened to my computer about 10 times on thursday, and did not affect the server computer at all. a simple reboot of my computer and all is fine again. although it has not actually happened since i got home from a weekend away. so maybe it has fixed itself.

anyway, the following is the ipconfig of the host computer (which has zonealarm pro installed on it):

Quote
Windows IP Configuration

Host Name . . . . . . . . . . . . : SERVER
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : Yes
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : 100/10Mbps Fast Ethernet PCI-Bus Ada
pter
Physical Address. . . . . . . . . : 00-08-A1-19-E0-E7
Dhcp Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.0.1
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : 212.159.13.49
212.159.13.50

PPP adapter Alcatel Speedtouch Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : WAN (PPP/SLIP) Interface
Physical Address. . . . . . . . . : 00-53-45-00-00-00
Dhcp Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 81.174.152.8
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . : 81.174.152.8
DNS Servers . . . . . . . . . . . : 212.159.11.150
212.159.13.150


and this is the ipconfig of the client computer which is having the problems:

Quote

Windows IP Configuration

Host Name . . . . . . . . . . . . : dave
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Mixed
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection 3:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel 21143-Based PCI Fast Ethernet
Adapter (Generic) #2
Physical Address. . . . . . . . . : 00-00-1C-B0-A1-04
Dhcp Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.0.200
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IP Address. . . . . . . . . . . . : fe80::200:1cff:feb0:a104%4
Default Gateway . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 212.159.13.49
212.159.13.50
fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1

Tunnel adapter Teredo Tunneling Pseudo-Interface:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : FF-FF-FF-FF-FF-FF-FF-FF
Dhcp Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : fe80::5445:5245:444f%5
Default Gateway . . . . . . . . . :
NetBIOS over Tcpip. . . . . . . . : Disabled

Tunnel adapter Automatic Tunneling Pseudo-Interface:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Automatic Tunneling Pseudo-Interface

Physical Address. . . . . . . . . : C0-A8-00-C8
Dhcp Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : fe80::5efe:192.168.0.200%2
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Disabled


there is only an entry for the localhost in the host file, and the cpu wasnt running at 100% when it happened.

michaelscott, yes we are using ICS in XP.

thanks for your help.
N/A

a very peculiar problem!

i spoke too soon, it just happened again.
N/A

a very peculiar problem!

Have you tried removing IPv6 support from the client computer?

Your server system doesn't use it, so I see little reason to have it enabled on the client.

If you do need it, have you tried removing it to see if it cures the problems.
N/A

a very peculiar problem!

heh, i actually added it as a feeble atempt to solve the problem. but i will remove it.

i also changed this computer so that it obtains an ip and dns servers automatically. i am not quite sure why i had it set up otherwise.

Quote

Windows IP Configuration

Host Name . . . . . . . . . . . . : dave
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Mixed
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection 3:

Connection-specific DNS Suffix . : mshome.net
Description . . . . . . . . . . . : Intel 21143-Based PCI Fast Ethernet
Adapter (Generic) #2
Physical Address. . . . . . . . . : 00-00-1C-B0-A1-04
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.0.200
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 192.168.0.1
Lease Obtained. . . . . . . . . . : 17 November 2003 11:40:50
Lease Expires . . . . . . . . . . : 24 November 2003 11:40:50
michaelscott
Grafter
Posts: 594
Registered: 09-08-2007

a very peculiar problem!

I see from mshome.net that you are using ICS in Windows XP. That is most probably your problem. I had the exact same trouble that you have described on my network until I got a proper piece of Proxy Server software. You should try Proxy+ from http://www.proxyplus.net/ or if you want to pay for a proxy then you can get Sygate Home Network from http://www.sygate.com
N/A

a very peculiar problem!

i just spent about an hour trying to get a proxy working, but with no avail Sad

i've been having a few weird problems with this computer over the past few weeks, so i am thinking of doing a reformat and starting from scrath again. and if that doesnt work then trying to get the proxy to work again.
N/A

a very peculiar problem!

Did you try swapping the dns when you get the problem? There is a fault with a service dns cache which can stop dns working.

Get a copy of tcip view from
http://www.sysinternals.com/ntw2k/utilities.shtml its free. and keep you eye on it. It may show something swamping the network. Any software that swamps the network like a download manager can stop dns getting through
N/A

a very peculiar problem!

mwright, i haven't tried swapping the dns servers - mainly because the problem only seems to happen on the client computer. i can browse the internet fine on the host pc :?:

i downloaded the TCPView program and although i didnt really understand it - the didnt seem to be anything out of the ordinary happening when the problem reoccured just now Cry

i have noticed that sygate have a 30 day trial available for their home network software. i think i may download and install that tomorrow. or alternatively i could try analogx proxy - is is good?
michaelscott
Grafter
Posts: 594
Registered: 09-08-2007

a very peculiar problem!

To set up a proxy...

On the machine with the internet connection, right click on My Network Places and go to properties. Right click on Local Area Connection and go to properties.
Click on 'Internet Protocol (TCP/IP)' and click properties.

Make sure 'Use the following IP address' is selected. Set the following fields to the following values:
IP address: 192.168.0.1
SN Mask: 255.255.255.0

Click OK and OK again. Go to the second PC, do the same as above but with the following values...

IP address: 192.168.0.2
SN Mask: 255.255.255.0
Default gateway: 192.168.0.1

In your browser on the second machine, set it to use a proxy server with the following settings:

192.168.0.1 on port 4080 (for ProxyPlus)
N/A

a very peculiar problem!

Its on the client pc that you need to swap the dns to se if this solves it as that is were the cache problem may be. You dont ned to reboot just give it a few mins and see if it then comes back
N/A

a very peculiar problem!

it happened again just now. swapped the dns. left for 5 minutes. still didnt work. left for another 10 minutes. still didnt work. reboot. worked fine Sad
N/A

a very peculiar problem!

As the thread is getting long we are getting lost as to were we are so lets start from a know starting point.

Set up the server which has the modem as follows
ip 10.0.0.2 subnet 255.255.255.0 dns 212.159.11.150 & 212.159.13.150

Set the other pc as follows
ip 10.0.0.1 subnet 255.255.255.0 default gateway 10.0.0.2 dns 212.159.11.150 & 212.159.13.150

Reboot both pcs and see how it goes from there.
do the following tests.
Can both pc's see each other and can you connect to the shares on the other pc's?
Can you ping www.plus.net from both pc?
Make sure the net cards are set to auto.
do a tracert to 194.119.131.66 can you do this off both pc ok?