DNS settings

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rscole86

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Topic # 18143 29-Dec-2007 16:19

How about we have a list of DNS settings/servers that each of the ISP's use? Along with their 'names' eg terminator etc etc.

We could also have informaion abour their TTL? Or is that kind of information sensitive?

cokemaster

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Reply # 102202 29-Dec-2007 20:49

I've added a little bit about DNS servers here, which involves an extremely brief description and link to wikipedia (useful information there).

Also included a few ISP DNS servers (some appear not to answer off net queries??)

Its sitting under Internet Settings till we find a better place for it.

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stu28

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Reply # 102524 2-Jan-2008 01:08

rscole86: Along with their 'names' eg terminator etc etc.

How did you guys find the “names” of the DNS servers?

cokemaster

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Reply # 102529 2-Jan-2008 09:26

A records or reverse DNS look ups :)

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stu28

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Reply # 102560 2-Jan-2008 14:59

Thanks cokemaster

PenultimateHop

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Reply # 102576 2-Jan-2008 18:10

I'm not sure what you mean by 'their TTL', as zone TTL is specific to the zone origin (generally speaking- - there are some exceptions).

The list put together by cokemaster looks good but I urge caution to people statically configuring DNS servers: use this only if you really must. From an ISP's perspective it is a major pain when you are migrating DNS servers (e.g. renumbering) and find that even after you change the automatically assigned addresses, you still have queries zinging in that you can't stop.

Also, many ISPs (with any sense) will restrict or will be restricting recursive queries coming from IP addresses that do not belong to them for security, much like how SMTP open relays stopped existing 11 years ago.

For what it's worth, I believe for recursive service you want dns1.clear.net.nz and dns2.clear.net.nz rather than ns1/ns2 - those used to be slave nameservers for the '.nz' zone. Alien and Terminator at Xtra also should no longer be used as recursive dns servers, with dnsc1 and dnsc2.xtra.co.nz replacing them.

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Reply # 102581 2-Jan-2008 18:27

Thanks PenultimateHop. I'll add a note to that effect given that most providers appear to be blocking external connections..

I've tried dns1.clear.net.nz and dns2. - they both appear to block external connections. I'm aware that dial up and broadband connections ( from personal experience) with xtra have been getting dnsc1 & dnsc2 for quite a while but still use alien and terminator (old habits die hard).

I think Ross was referring to TTL that applies to DNS records. Specifically his new domain.

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