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Forums › Linux › Debian can't access DNS


534 posts

Ultimate Geek


# 151538 28-Aug-2014 16:18
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Hi,

I've had Debian running fine on 2 computers for a while now, but suddenly neither of them can access Google DNS or the LAN. It is working fine on my Windows 8.1 laptop, but not on the servers. I have tried to reinstall but it has not fixed anything. I'm on Orcon using the Orcon Geinus (Netcomm NF4V). 

Why could this be happening?

If you have any ideas please leave them beloww.

Thanks




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gzt

10909 posts

Uber Geek


  # 1117351 28-Aug-2014 16:44
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Other than that you still have internet access from those machines?



534 posts

Ultimate Geek


  # 1117352 28-Aug-2014 16:46
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gzt: Other than that you still have internet access from those machines?

No, I can't ping my router or anything.




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541 posts

Ultimate Geek

Subscriber

  # 1117368 28-Aug-2014 17:08
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If you cannot ping an ip address then it is not a DNS issue.

Are you using static IP addresses or DHCP?




Geoff E

74 posts

Master Geek


  # 1117369 28-Aug-2014 17:10
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what is the output of ifconfig  ?



534 posts

Ultimate Geek


  # 1117370 28-Aug-2014 17:10
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geocom: If you cannot ping an ip address then it is not a DNS issue.

Are you using static IP addresses or DHCP?


Static. I tried DHCP but made no difference.

Edit: Wait, just tried DHCP and it worked. wot.




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541 posts

Ultimate Geek

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  # 1117372 28-Aug-2014 17:16
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dcole13:
geocom: If you cannot ping an ip address then it is not a DNS issue.

Are you using static IP addresses or DHCP?


Static. I tried DHCP but made no difference.

Edit: Wait, just tried DHCP and it worked. wot.


Do what gstarkey said and do an ifconfig and see if the what changed between your static IP setup and DHCP setup.




Geoff E

1015 posts

Uber Geek

Trusted

  # 1117373 28-Aug-2014 17:16
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Any chance you upgraded the version of Debian you're running?

 

Possible driver issue?

 
 
 
 




534 posts

Ultimate Geek


  # 1117374 28-Aug-2014 17:18
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geocom:
dcole13:
geocom: If you cannot ping an ip address then it is not a DNS issue.

Are you using static IP addresses or DHCP?


Static. I tried DHCP but made no difference.

Edit: Wait, just tried DHCP and it worked. wot.


Do what gstarkey said and do an ifconfig and see if the what changed between your static IP setup and DHCP setup.


Nothing changed on a ifconfig between static and DHCP, trying to find an equivilent ipconfig /all on Debian.




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534 posts

Ultimate Geek


  # 1117377 28-Aug-2014 17:19
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Andib: Any chance you upgraded the version of Debian you're running? Possible driver issue?


Haven't changed anything




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gzt

10909 posts

Uber Geek


  # 1117384 28-Aug-2014 17:27
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dcole13:
geocom: If you cannot ping an ip address then it is not a DNS issue.

Are you using static IP addresses or DHCP?


Static. I tried DHCP but made no difference.

Edit: Wait, just tried DHCP and it worked. wot.

So on DHCP - everything works?



534 posts

Ultimate Geek


  # 1117388 28-Aug-2014 17:30
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gzt:
dcole13:
geocom: If you cannot ping an ip address then it is not a DNS issue.

Are you using static IP addresses or DHCP?


Static. I tried DHCP but made no difference.

Edit: Wait, just tried DHCP and it worked. wot.

So on DHCP - everything works?


Yes




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541 posts

Ultimate Geek

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  # 1117390 28-Aug-2014 17:32
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Your not doing something like setting the static ip address within the routers DHCP range?

What happens when you ping the address you where using for the static ip address?




Geoff E



534 posts

Ultimate Geek


  # 1117391 28-Aug-2014 17:33
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geocom: Your not doing something like setting the static ip address within the routers DHCP range?

What happens when you ping the address you where using for the static ip address?


Nope, not doing that. When I ping the static IP address it just says "Destination Hosst Unreachable"




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gzt

10909 posts

Uber Geek


  # 1117392 28-Aug-2014 17:34
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This really implies that your router does not like those particular static ip addresses anymore for some reason.

What are the the static ip's you are using, and what are the DHCP IP's allocated to the same machines?



534 posts

Ultimate Geek


  # 1117394 28-Aug-2014 17:36
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gzt: This really implies that your router does not like those particular static ip addresses anymore for some reason.

What are the the static ip's you are using, and what are the DHCP IP's allocated to the same machines?


Using 192.168.1.200 for my static IP. Currently the second computer is not plugged in but ususally is on 192.168.1.201. I have disabled the 192.168.1.200-192.168.1.253 zone in DHCP on my router for any static IPs. The server is currently on 192.168.1.10




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