nahrada za bind

[Ing. Pavel PaJaSoft Janousek]

Zdenek Mazanec wrote:
>>fonet.cz.               3600    IN      SOA     excalibur.fonet.cz.
>>info.fonet.cz. 2002101501 10800 1800 86400 3600
> 
> 
>>Tak a ted bych rad vedel, ktery z DNS serveru je primarni a ktery
> 
> Soude podle radku  fonet.cz.               3600    IN      SOA
> excalibur.fonet.cz.
> jsou dve moznosti - primar je excalibur.fonet.cz nebo clovek, ktery tu zonu
> psal je cunik ;-)

	Vychazim z tohoto URL - 
http://support.microsoft.com/default.aspx?scid=KB;EN-US;Q163971&

MORE INFORMATION
The SOA resource record contains the following information:

Source host - The host where the file was created.

tedy excalibur.fonet.cz je pocitac, ktery s 'primarnim' DNS serverem 
nemusi mit nic spolecneho...

Na dalsi stranu - 
http://www.nic.fr/guides/dns-ressources/html/ripe-203.html rika:

  4.1. The MNAME Value

        The DNS specification explicitly states that the primary master
        server be named here. The value must be determined and used.

Ale v dalsim informacnim zdroji - 
http://whatexit.org/tal/mywritings/dnssoa.html

The first couple fields:
The "dirty.research.bell-labs.com" is the DNS master. (The old 
"primary/secondary" terminology has been recently replaced with 
"master/slave"). However, that's just a comment. No piece of code 
actually uses that.

	Tedy primar to je, ale nikdo to z teto informace nepouzije...

	Nicmene autoritativni RFC1035 rika v 3.3.13. jasne, ze:

MNAME           The <domain-name> of the name server that was the
                 original or primary source of data for this zone.


	Tak by mne tedy zajimalo, proc se v slave DNS serverech musi vzdy 
specifikovat zdroj, odkud to maji brat, kdyz si to vsichni jsou schopni 
sami zjistit (IMHO to neni jen zalezitost BINDu)?

> neni clovekovi, ktery se o ucasnene nameservery stara a musi nejak zajistit,
> aby oba (vsechny) davaly stejne odpovedi. V dobe (davne) kdy jsem se o djdns

	A je korektni, aby oba dva davali v SOA MNAME sebe? Uz jsem to videl...:-)

> Ted je to mozna uz jinak, to je mozne a nijak se o to nepru. Nicmene
> neverim, ze je nekomu ze zucastnenych nejasny rozdil mezi primarnim dns a
> "temi ostatnimi".

	Ja se hlasim do fronty, cist umim, teorie je hezka, ale praxi prochazim 
rovnez a priznam se, ze mi to zcela jasne neni. Registratorum to prece 
nemuze byt jedno rovnez, protoze ty tu zonu musi propagovat z primarniho 
zdroje, ne z nejakych poslicku...

PS: Ktera aplikace, resp. ktery resolver se na SOA ohlizi?

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Ing. Pavel Janousek (PaJaSoft)                 FoNet, spol. s r. o.
Vyvoj software, Intranet / Internet          Sokolova 67, 619 00 Brno
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