DNS Howto (3)

Kostas Liakakis kostas at rincewind.techpath.gr
Fri Oct 10 11:41:30 EEST 1997


On Fri, 10 Oct 1997, Michalas Othon wrote:

> Or8h epanalhyh:
> 1.) To resolv.conf xreiazetai, eidika otan den trexeis ton named.

Auto pou leo einai oti kalo einai na to exeis kai stis dyo periptoseis. 
Mporei to default na einai to diko sou mhxanhma alla h sosth praktikh
einai na to exeis. Alloste mporeis na oriseis kai polla alla pragmata ekei
mesa pera apo to name server. 

> >> H sunta3h einai aplh:
> >> 1 grammh: ->domain
> >> 2 grammh: -> onoma_server_xwris_domain ip_tou_server
> >> Epanelabe th grammh 2 an exeis kai alles mhxanes
> >
> >La0os. H sosth synta3h, an to onoma mou einai skiathos.physics.auth.gr
> >einai: domain physics.auth.gr 
> >
> 
> Swstos
> =======
> Or8h epanalhyh:
> >> 1 grammh: ->domain to_domain_name

Tora den katalabaino... Sosta se dior0osa `h sosta to egrapses?

> ????? Den katalaba ?????
> =====================

Ego den eixa katalabei, tora pou to ekanes poio 3eka0aro omos...

> H grammh 2 den perigrafei kapoio 'h kapoia domain alla onomata
> mhxanwn . Sto paradeigma sou an exw duo mhxanes opou h prwth
> legetai Alfa kai h deuterh Bhta tote exw p.x.:
> 
> domain physics.auth.gr 
> alfa 192.168.12.1
> bhta 192.168.12.2

Oi dyo teleutaies den anhkoun sto resolv.conf alla sto /etc/hosts (to ip
proto to onoma deutero). To resolv.conf den kanei name resolving. 
Periexei entoles gia ths routines pou to kanoun. 

> >Otan 0a exeis diko sou nameserver den einai anagkh na baleis kanena allo,
> >exeis to sta0ero cache me tous root nameservers ap'opou o dikos sou 0a
> >ma0ei siga siga ola ta ypoloipa. 
> >
> 
> ????????????????
> ===============
> 
> Gia thn ugeia twn neurwn sou mhn to kaneis.

To kano kai ta neura mou einai poly kala sthn ygeia tous :-)

> Dioti an to kaneis kai sou pesei 'h sou kolhsei o dikos sou nameserver
> tote 8a thflw8ei to susthma sou.

Alimono an ena systhma tyflo0ei epidei exase to dns tou. An pesei o
primary nameserver mou e3allou 0a 0elo na to katalabo amesos. Oxi otan 0a
kanoun expire ta cache sta secondaries. 

Se mhxanhma pou mpainei kosmos kai douleuei pantos, exeis dikio, den 0elo
na exo olous tous xrhstes sthn porta mou: "niania nia... to telnet mou
xalase, nia nia, den exo diktyo..." 

Synh0os omos h process tou primary dns ka0etai se kapoio "server" kai oxi
"public access" mhxanhma. Telos panton einai to configuration pou kanoume
arketo kairo tora kai mas exei bolepsei. 

-K.

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