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Old 03-30-2004, 02:18 AM   #1
Bassam
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Question Why can not access the root domain names?


Hello Guys,
my inquiry consists of two questions as follows:

1- Is it possible to use root DNS servers instead of the authoritative DNS servers of the ISP that I am connected too?

2- If yes, then why my machine can not access these root DNS servers?

to be clear, I am in Malaysia and I am connected to the main ISP and their DNS server IP address are (202.188.0.133 and 202.188.1.5), I changed the DNS IP address of my machine to one of the root DNS server (like the one operated by IANA 198.32.64.12 or by RIP NCC 193.0.14.129), but unfortunately I am not able to get any response when I request any URL.
Take note that I am able to ping these root DNS servers.

Later I changed the DNS IP address settings in my machine to the one of the DNS server of a local company in Malaysia, and I succeeded to get the URLs that I requested.

Does that mean that the DNS requests over port 53 to outside Malaysia have denied and blocked: by the ISP peolpe whoes I am connected to??


Please clarify for me this situation

Thanks for the help
Bassam
 
Old 03-30-2004, 03:06 AM   #2
born4linux
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1 - no. DNS root servers are consulted by Internet Name servers. these are queried for the domain name that you are trying to acces based from the Internet DNS server that you are using.
2 - what you can do is stick with your ISP's DNS servers OR setup your own DNS service (if you are using a commercial IP - ie. the one from your ISP). u might need to update your named.ca file. search for some DNS howto's for a clearer explanation.
 
Old 03-30-2004, 03:16 AM   #3
Rak
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born4linux , could you take a look at my post please , Do I have to change my cpu's address to Ip my isp gave me .
I am new to linux and trying to learn so sorry about these questions.
Thanks.
 
Old 03-30-2004, 03:36 AM   #4
born4linux
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if you feel you won't get blocked by that company who's DNS server you are using, well, maybe u can stick to it.
if you dont' want to setup your own DNS service, use your ISP's DNS server IP addresses - that's the most recommended solution for first time cases like this.
if u feel u want something more, go search in www.google.com/linux for some "DNS howtos" and try setting up your own DNS server. if it still fails, go back to your ISP's DNS server setup and search for more howto's that will help u in setting up your own DNS server.
 
Old 03-30-2004, 03:41 AM   #5
Rak
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Thanks For the link and the response .
This is going to sound stupid, But... I can set up the Dns service on my cpu and use that to surf and etc ?
I would like and need my own anyway .
Thanks.
 
Old 03-30-2004, 03:57 AM   #6
Bassam
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I think my inquiry has mixed with Rak's one
Any way born4linux, do you mean that normal clients can not cnosult the root DNS servers directly? Do you mean that the only Local, Authoritative or other Root DNS servers can only consult the root DNS servers???

Regards
Bassam
 
Old 03-30-2004, 04:15 AM   #7
Rak
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Sorry Bassam .
I wont post here about my problem .
 
Old 03-30-2004, 04:54 AM   #8
born4linux
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sorry Bassam, i just noticed there were two of you here. No. clients shouldn't use the root servers directly (though they can) but that would be useless and a waste of time/bandwidth. each name server consults another higher level name server for it to locate a domain that you are trying to access. it works out like some kind of hierarchial structure. better check out the DNS admin howto for a better explanation. i'm not good at explaining things.
 
  


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