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642 posts

Ultimate Geek
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Topic # 84192 26-May-2011 11:27
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Noob alert!

In my router's status page, why is Secondary DNS Server displayed as 0.0.0.0? Is this bad?

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1984 posts

Uber Geek
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  Reply # 474317 26-May-2011 11:39
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Your ISP might be load balancing all their DNS servers anyway, so decided not to specify the secondary in their PPP setup. Its just a backup, so if you want to set it manually then you could enter one from a different ISP.




Qualified in business, certified in fibre, stuck in copper, have to keep going  ^_^

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Ultimate Geek
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  Reply # 474322 26-May-2011 11:43
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Is this where it is listing the external DNS from the ISP or is it the DNS used for end users of your router?
I'm assuming it's an ADSL router we are talking about.

In most case if the later, you normally only have one - most often the router's own address.
If this is a listing of the DNS provided from the ISP, I would have thought there would be more than one.

Inany case, 0.0.0.0 means not defined.



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Ultimate Geek
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  Reply # 474347 26-May-2011 12:23
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alexx: Is this where it is listing the external DNS from the ISP or is it the DNS used for end users of your router?


I don't know. It's in the router's main status page, under the WAN section.

alexx: I'm assuming it's an ADSL router we are talking about.


It's a DIR-655 Router connected to a TD-8840 ADSL modem.
 

Also, should QoS be disabled on the modem and enabled on the router? 

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  Reply # 474357 26-May-2011 12:34
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Are you using the ip extension / half bridge feature? I think the TP Link implementation only passes 1 dns server address through when in half bridge.

Doesn't really make a difference unless the dns server is down.



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Ultimate Geek
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  Reply # 474385 26-May-2011 13:18
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Ragnor: Are you using the ip extension / half bridge feature?


Yes. I suppose that explains it then.

Any comment on QoS? 

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  Reply # 474387 26-May-2011 13:22
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Yeah you can disable stuff on the modem/router that the other router will be doing but I think enabling half bridge / ip extension overrides / bypasses a lot of those settings anyway.



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Ultimate Geek
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  Reply # 474462 26-May-2011 15:44
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I just gave my pc a static ip, and now I can only access the router setup page. I used to be able to access both the router and the modem with DHCP. Why is that?

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  Reply # 474496 26-May-2011 17:39
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Oubadah: I just gave my pc a static ip, and now I can only access the router setup page. I used to be able to access both the router and the modem with DHCP. Why is that?


In your setup:

What is LAN address of the modem/router?
What is the LAN address of the 2nd router (DD-WRT)? 
What is the address you gave your PC?

I think DD-WRT has an option to always assign the same address to a PC by mac address, try that option then you can leave your PC set at obtain automatically.



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Ultimate Geek
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  Reply # 474502 26-May-2011 17:54
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Ragnor:

What is LAN address of the modem/router?
What is the LAN address of the 2nd router (DD-WRT)? 
What is the address you gave your PC?


Modem: 192.168.1.1
Router:  192.168.2.1
PC:       192.168.2.10

I don't use any after market firmware. I know the DIR-655 doesn't even support DD-WRT.



642 posts

Ultimate Geek
+1 received by user: 11


  Reply # 474561 26-May-2011 20:59
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Suddenly I can access my modem again... I haven't touched anything since my last post (still using the static IP). 

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