NAF

I need some help with this one!

I have a wired desktop pc , wireless laptop and wired xbox 360 connected using a Zyxel router.

All 3 can talk to each other, I can stream music etc through the xbox from both pc's.

Both the xbox and laptop can connect to the Internet.

However the desktop pc cannot. It seems as if there is a DNS error.

All are set up for automatic ip assignment and using ipconfig/all i have confirmed both computers are using the same and correct DNS addresses

No 3rd party security software . XP firewall is enabled

Any ideas ??

Dedrater

//scratch that, I re read your post

Dedrater

I would check the hosts file though.

Fabioso

Each PC connected to the router should have a unique ip address which should differ on the last quad. Can you verify that this is the case ? If you take off the firewall momentarily from the PC that doesn't work, does it then connect to the Internet ok ? If you do ping 127.0.0.1 in the cmd window of the PC with the connection issue, does it come back with a satisfactory reply ?

What if you ping www.bbc.co.uk ?

Generally I find its either a physical connection issue or a firewall issue that prevents connection. Check the type of 10/100 cable you are using and that its the right type. The physical setup could be the key, do other machines connect using the same method ok ? Do you have some kind of filter based connection on your router ? either by MAC or IP address ?

Sorry to bombard you with questions, its all the things I thought of as they came to me

Mr-Confused

Hi,

Looking at your original post you seem to have IP connectivity on your local LAN so thinking that DNS is at fault would be reasonable if you are talking to your other devices purely with IP.

To test for a DNS issus enter this IP address 66.102.9.104 into a web browser, if you get the google front page then yes you have a rogue DNS entry on your PC.

To check your DNS settings, from the command window 'Start, Run, cmd' type ipconfig /all and check the results against those from your laptop assuming that is connecting to the internet via your wireless connection and not an unencrypted network next door.

My money is on the router having a limit on the amount of outbound connections it can support though.

NAF

hi guys , thanks for the replies

I'm at work at the mo and away from home for few days but will try some of the suggestions you've made when I get back.

Also just for some further info ..

no filter based connection .. haven't tried pinging 127.0.0.1

I can ping 4.2.2.2 and get a reply which suggests it can connect to the net , hence the reason I was thinking DNS issue.

Tried pinging www.google,com but getting timed out reply , same for other sites

Each device has unique ip address , DNS settings identical on both desktop pc and lappy.

Desktop pc will not display webpages even with both h/ware and s/ware firewalls disabled and laptop disconnected from network.

It was all working fine until recently when I fowarded some ports for utorrent due to the very bad d/l speeds I was getting

I found afterwards I could not stream media from pc through xbox

After some tinkering I got it to stream again and all devices could see each other but pc won't display webpages ...

Dedrater

What is the software firewall? I would try totally removing that, Zonealarm, Sygate and Norton are known to block when the program is technically not running, due to a Service that continues to run in the background

NAF

Hi dedrater

Its win xp firewall

hodgy0_2

be carefull -- a request time out means nothing in terms of name resolution -- coz the website could block the ping protocol --the important thing is whether the name resolves as in the below example -- the txt in bold proves name resolution even though i get a resquest time out

ping "www.bbc.co.uk"

Pinging "www.bbc.net.uk" [212.58.251.195] with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.

also always keep in mind technically speaking internet access has nothing to do with web access (web access is just accessing the internet over port 80)

name resolution has nothing to do with internet access either
do you have a proxy server listed in i.e also try firefox maybe

NAF

Hi Hodgy

Good points
IIRC the ip address of the site did not show after the www name
No proxy server listed
I will try firefox and see how that goes

hodgy0_2

no worries NAF -- I think your on the right track

I would 1st confirm intenet access -- by pinging 4.2.2.2 (Which you have done)

next confirm name resolution by my method above, disregard any timeouts just look for the bold txt

next you can confirm port 80 communication by typeing the following telnet "www.bbc.co.uk" 80 (no quotes) -- this will try and make a port 80 (WWW) connection to the website (obviously wont work if name resolution isnt working) -- if successfull a new dos window will open, type something in the box -- you prob wont see it then press return the website should return an error -- in text format obviously

if all that is OK then you deffo have some sort of browser problem

NAF

Cheers Hodgy

I will try that

I wonder if I've caused an issue with port 80 whilst I was fowarding ports for utorrent.

I did try using port 80 at one stage as a listening port cos I suspected my ISP was throttling torrents

Thanks