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I have a issue with no internet on PC...



  Fiat Panda 100hp
I'm not online for some reason.

Coming via a wired router which is working as my mac is online.

PC can pink localhost but cant ping www.bbc.co.uk

Reinstalled all network drivers etc

installed a old NIC I had lying around too, still not working, comes limited or no connectivity on both cards.

On the properties sent is blue and recieved has a cross through it, so its just recieving data but i dont know why, was working fine yesterday,tried system restore too, didnt work.

What you think is the problem?
 

sn00p

ClioSport Club Member
  A blue one.
You tried a different cable?

Edit: You'll always be able to ping localhost as it is the loopback ip address. (unless somebody has removed the localhost host entry or changed its IP).
 
Limited or no connectivity means it's not getting a DHCP address.

So it could be something like a broken DHCP server, firewall settings, damaged cable etc.
 
  Fiat Panda 100hp
ive done it now, went in to the router and released/renewed it, don't know why it worked as my mac is on the same router and thats fine. Strange.

Lol, ive been telling customers to do ping localhost to check the connection between PC and router... oops, how do you ping router then?
 

sn00p

ClioSport Club Member
  A blue one.
ive done it now, went in to the router and released/renewed it, don't know why it worked as my mac is on the same router and thats fine. Strange.

No comment. *

Lol, ive been telling customers to do ping localhost to check the connection between PC and router... oops, how do you ping router then?

You have to ensure that the computer is on the same IP range as the router and then ping the IP address of the router....

1) If you're router is running a DHCP server and you're configured to use DHCP, then it should be working anyway. (although in you're above situation it wasn't!)

2) If 1 is true, then as long as the router is supplying the gateway information then this will appear in windows. (ipconfig /all -> look for gateway), you can ping this (providing the router is configured to respond to ICMP ping packets).

3) Number 2 is academic, if your connection is not working then you won't be able to get any information out of windows.

4) If windows fails to get an IP address from the DHCP server it will will assign a link-local ip address 169.254.X.X. After failure it runs an algorithm to assign an IP in this range. You can pretty much assume that if you have an IP address in this range, something has gone wrong.

5) If you have a router that isn't giving out IP addresses then there's not much you can do apart from resetting it to factory settings and assigning it a known IP address.

There are ways around this, installing a packet sniffer and looking for network activity (usually ARP or RARP packets) that the router will be sending out as normal activity. These will give you the IP of the router.


That's about it!

* (if I were to comment I'd tell you that Windows is shite and that UNIX rules)
 


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