Ӽ  ver 0.2

躴 <redhands@linux.sarang.net>
Ȩ: www.linux.sarang.net
V0.21, 1998 7 2

 ٽ    ÿ vi   ׽ϴ. ׵ ¥ 
5.0  ٴ ΰ Ȩ Ʈ  ʰ պ ٺ ̸ 
Ǿ׿. ̹ ȸ   ֱ⸦ ϴ.

 ۿ θ , Ӽ   ׸  
  ϰ ׽Ʈ   ִ   մϴ. ٽ O'Reilly
 DNS & BIND   Ҳ .   Ӽ , Ͻô 
е鿡  Ǿ մϴ.

 ϵ  غ  ̻ ϴ. ߸  η ϱ 
    ʽÿ. 

_______________________________________________________________________________
-------------------------------------------------------------------------------

                        [  &  Ӽ ]


 θ̶ ΰ?

Ӽ ϱ  켱 θ ΰ  ˾ƾ 
 մϴ. ٵ ʹ  ˰ ִ κΰ?

θ  ְڽϱ? ׳ nownuri.net ̶ linux.sarang.net  
 θ. ͳݿ  ȣƮ  ϰ ʹٸ? (̰ 
ڳ̰)  ȣƮ ּҸ ˾ƾ ϰ. ͳݿ  ִ  ȣƮ
ڽŸ IP ּҸ  ֽϴ. ̰ ٷ ͳݿ ּԴϴ.  
 ڽ linux.sarang.net   IP ּҰ 168.126.127.250 Դϴ. 
迡 ϰ   ִ ּ. ^^ (ּҰ Ȱ ΰ 
ִ° ̽ϱ?) ׷  ̶    ܿ . 
168.126.127.250, 203.238.128.51 ̷ ؼ  Ҽ ?   
 ư ϴ° 翬 ̰ п θ̶  ϰ
Ǿٰ մϴ. ^^

linux.sarang.net  168.126.127.250 ߿   ܿ   ƽø
˴ϴ. ׷ ϳ ϰ Ѿ  θ (Ȯ ؼ FQDN, 
A Fully Qualified Domain Name)  ͳ ּҰ ƴ϶ Դϴ.  
  ֱ ؼ IP ּҸ ˾ƾ  ʿ䰡 ִµ Ѵ ܿ  
 ϰڽϱ? Ӽ ٷ θ IP ּҷ ٲپ ִ 
(Ǵ  ݴ IP ּҸ θ ٲپ ִ ) ϰ ˴ϴ.

 Ӽ 

׷ Ӽ  θ <-> IP ּ    ? 
 ̷   ѵ   ׷  GO! Ʊ 
    θ IP ּҸ   ϰڽϴ.

  θ IP ּҸ ãƳ    մϴ. ϳ 
ϳ ʴ  ã  Դϴ. linux.sarang.net  IP ּҸ ã
ؼ    ൿ ϴ 캼?

----- θ -> IP ּ  ----------------------------------------------

                     linux.sarang.net.
                A.ROOT-SERVERS.NET. 
                NS ns.sarang.net    
    
local              linux.sarang.net.
 name   ns.sarang.net.
  server     NS ns.linux.sarang.net.
    
                 linux.sarang.net.
               ns.linux.sarang.net. 
               A 168.126.127.250    
     
      A  : IP ּ
(resolver)      NS :  

-------------------------------------------------------------------------------

linux.sarang.net  ã  켱 Ӽ ڽ  ִ Ӽ Ʈ 
 Ͽ ֻ  ϴ Ӽ sarang.net  
ûϰ ˴ϴ. ׷ Ʈ   sarang.net zone  ϴ Ӽ
ns.sarang.net ̶ ˷ ٰԴϴ. ׷ ٽ 츮  Ӽ 
ns.sarang.net  linux.sarang.net    ޶ ûմϴ. 
ns.sarang.net  û ް linux.sarang.net zone  ϴ Ӽ 
ns.linux.sarang.net ̶  ˷ٰ̰,  ns.linux.sarang.net 
 ûϸ ڽ Ÿ̽ linux.sarang.net  IP ּҰ 
168.126.127.250 ̶  ˷ Դϴ. ( ?  
δٴ°  ʰ ^^) κ ( "."  ؼ 
ʿ  θԴϴ.)   ؼ  
 Դϴ. ġ Žϴ° .

----- ܺο  ã? -------------------------------------------

ϳ ¤ Ѿ Ұ ֽϴ.  е ڽ  Ӽ 
⸸ ϸ ܺο   ã   ϴ° 
ҽϴ.  Ѱó θ IP ּҷ ٲٱ ؼ Ӽ 
 Ӽκ ʴ  ϰ  µ ߰ ̻  
ִٸ  ã ? ڽ  Ӽ  ִٰ ص  
Ӽ  zone  ϴ Ӽ  Ǿ  ʴٸ  
   Դϴ.  ǳʶٴ  ŵ.  Ӽ
      ִٸ Ƹ ͳ  
ɲϴ. ^^

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 ϰ Ӽ   ִµ  ̳༮ 
 ϴ ϱ ϴ  ġ  鼭   ? 
  ߵ  ū 
θ IP ּҷ ȯؼ ˷ְ  IP ּҸ θ ȯ 
Դϴ. ׸  ϳ, Ư (zone)  Ÿ  ܺο 
   ְ ˴ϴ.  ϴ° ƴ϶ 亯 ϴ . 
Ӽ ̶ ٸ ƴ϶ 亯 ϱ     ֵ 
ִ ̰.  ϴ Ӽ ̶   ʿ䵵
  մϴ. 
( ϳ ޶ ־ ָ ̰ŵ. caching only name server  մϴ. 
Ŀ Ҳ.)

Ӽ   ̿ؼ θ <-> IP ּ  س . 
ڽ    ʴٸ?   ó  ãƼ ٸ 
Ӽ鿡  ϰ Ǵ Դϴ. (׷  ϴ   Ѱ.
ϴ  ãƴ ش!^^)

  ϴ   ?  ⺻̴  ϴ°͵ ܿ
  ϴ.     鼭 ߰ ߰ μ 
 ϵ .



                        [ Ӽ  ]

 ۿ Ӽ α׷ bind  ϰ ġϰ ϴ°   
ʰڽϴ. 򿡾  Ű  ͼ    ʾƵ 
⺻  ϴϱ.  ؼ ž ڴٸ ftp.isc.org  
bind ҽ ޾ƿż     о ð  غñ ٶϴ.

 ʱȭ   (named.boot)

Ӽ ⺻   ϳԴϴ. ٷ /etc/named.boot Դϴ.   
κ ڰ ϱ Դϴ.

Ӽ Ҷ /etc/named.boot   о Ŀ  ȿ   
ٸ  ϱ⵵ ϰ Ű´ ۵ ϰ ˴ϴ. ƹ  鿩
ƾ ?

----- /etc/named.boot   -----------------------------------------------

directory                                       /var/named
cache           .                               named.root
primary         linux.sarang.net                linux.zone
primary         0.0.127.in-addr.arpa            local.rev
primary         127.126.168.in-addr.arpa        linux.rev

-------------------------------------------------------------------------------

 ýۿ Ǿ ִ°  ־ϴ. . ⺻ 
̴ ɼ? ±?  3Դϴ. װ͸  Ӽ ϳ ҵ ذ
 ֽϴ.  ϰ ٹ     ô. ( Ҹ 
ϴ°?)

directory, cache, primary ̷ 3 Դϴ.  غ .

- directory   <new-directory>
  Ӽ   Ÿ ϵ ġ 丮 ϴ Դϴ. 
  ٸ ɼǿ ϴ ϵ ⼭  丮 ؿ ã Ǵ 
  Դϴ. ̰ ̳༮ ϴ  Դϴ.

- cache   <domain>   <file>
  Ʈ Ӽ鿡    ִ  մϴ.   κп
   ϳ ˰ Ѿ Ұ ݱ.  츮 θ  
  linux.sarang.net ̷ .  Ȯϰ   "."  ϳ
   ٿ մϴ. ׷ϱ 츮 Ϲ   "."  Ǿ ִ
  Դϴ. ׷ϱ ֻ  "."  Ǵ .  Ӽ 
   ã Ҷ      "."  ϴ Ӽ
  ǰ.  domain   κп "."   ִ ذ ǽô?

   ϴ cache Ͽ "."  ϴ Ӽ鿡   
  ϵǾ ְ   ̿ؼ  ã Ǵ°̴ϴ.  ߿ 
  ̰?  Ӽ ϵ   ׻ ؾ մϴ.

   ̸  named.root  µ  ֱ Դϴ.  
  ڰ   ƴ϶ ʹп ϴ  ޾Ƽ  ˴ϴ. 
  ftp://ftp.rs.internic.net/domain  named.root  ޾Ƽ ϸ 
  ˴ϴ. bind ҽ Ű ԵǾ ֽϴ.  뿡 ؼ 
  Ŀ ˾  .

- primary   <domain-name-of-zone>   <file>
    ϴ  (zone)     մϴ.

    domain κп linux.sarang.net ̶  . ׷ϱ 
  Ӽ (query) ö linux.sarang.net  θ ؼ
   Ͽ  ã  Դϴ. linux.sarang.net  ̶
  ϸ  򰥸 𸣰ڽϴ. ϰ ڸ *.linux.sarang.net  
  ϴ Դϴ. ( *   ϴ ƽø Ͻϴ.)

   ϳ غ?    ϳ Ӽ    
  ִ ? 翬 ϰ?      ְ Ÿ
   ϸ شٸ?  鰳     ?

----- IP -> θ ã -----------------------------------------------------

   domain κп  ִ 0.0.127.in-addr.arpa  ü ϱ? ٽ 
  ѹ  ġ   ڱ. Ӽ ϴ ߿ θ
  IP ּҷ ٲٴ°Ͱ IP ּҸ θ ٲٴ  ִٴ°  
   ƽð. in-addr.arpa κ IP   ٲٱ  
  Դϴ.

  0.0.127.in-addr.arpa  ϴ  127.0.0.*   IP   Ѵٴ 
  Դϴ.  ̻? 츮    ƴ϶ . IP 
  ؼ ΰ Ʋ  ϴ. ѹ ã  ˾ ?  
  linux.sarang.net   غ .  IP ּҰ 168.126.127.250
  ̴ϱ ϳ ϳ  ãư ô. ( պκк ãƾ ? 
  named.boot      250.127.126.168.in-addr.arpa ̷
  ǳ׿. ΰ  ڿ ã . )

----- IP ּ -> θ  ----------------------------------------------

        250.127.126.168.in-addr.arpa. 
                A.ROOT-SERVERS.NET. 
                NS ns.kornet.nm.kr  
    
local        203.127.126.168.in...  
 name   ns.kornet.nm.kr.
  server       co-H1-250.kornet.nm.kr 

                     NS :  
     
     

(resolver)


-------------------------------------------------------------------------------

    IP  ãƺ θ co-H1-250.kornet.nm.kr  ±. , 
  · ã    .

   ֻ "." ̾ IP ּ ֻ in-addr.arpa. Դϴ.  
  ֻ IP  ϴ Ӽ Ǹ ϰ. ׷ ֻ  
  168.126.*.*  ϴ Ӽ ns.kornet.nm.kr ̶  ݴϴ. 
  (߰ Ǿٱ? 168  ֻ ʹ  ־ 
  ׷ϴ.) ׷ ns.kornet.nm.kr  Ǹ ϰ ǰ  IP  ´ 
   co-H1-250.kornet.nm.kr ̶  ˷.

  ⼭ ø Ѱ ̽½ Դϴ. и linux.sarang.net  
  IP  168.126.127.250 ̾µ IP κ ãƺ   ? 
  IP   ̿  谡  ?  򰥸  
  κԴϴ.

   IP  ٲپ ִ°    ϴ Ӽ
  մϴ. IP   ٲپ ִ     IP  ϴ
  Ӽ ְ ˴ϴ.  ġؾ߸ ұ?  ƴմϴ.

   203.251.92.*  C Ŭ IP  ϰ sarang.net ̶  
   ִٰ غ? 168.126.127.250 ̶ IP  linux.sarang.net ̶
   ְ ͽϴ.   IP  ƴ? Ұұ? ƴմϴ. 
  ƹ   οټ ֽϴ. ϴ  Դϴ. nownuri.net
   IP  203.238.128.51 ٰ slow.sarang.net  ְ   ص
  ˴ϴ. ( 촩 T_T) ׷ IP  ? nownuri.net ̶ 
   203.251.92.250 ٰ ְ ʹٸ? ָ ˴ϴ. ƹ  
  ϴ. ^^

  ٽ ؼ ڽ   ڽ  IP  ο  ִ ͵ 
  ڽ  IP  ڽ  θ οټ ִ ͵ ƴմϴ. ׳ 
  ϴ´ ^^  sarang.net ̶    ִµ ϰ 
  linux.net ̷ οټ ִ  ƴ. ذ Ƿ 
  𸣰ڽϴ.  ְ  ...

-------------------------------------------------------------------------------

- secondary   <domain-name-of-zone> <ip-address-list>   [backup-file]
    ϴ  (zone)     ׸ 
   մϴ.

  Ӽ ΰ Ÿ ֽϴ.  ߴ (ٸ κб 鿴
  ) primary master  secondary master Դϴ. (ide ϵ  ϴ° .)
   ̴  Ÿ   ִ ƴϳ ϴ Դϴ.  
   Ȱϴ. primary     Ÿ   ־ 
   secondary  ٸ   Ÿ ޾ƿͼ մϴ.

  ip-address-list κп    ip   ˴ϴ. ׷ 
   ο      ˴ϴ.  ν 
     ̰ ɽҶ غ  Դϴ. SOA ʵ secondary 
   谡   κп  ڼ ⸦ غ .

    ͵  Ѱ ?  û  ֽϴ.
θ     ؾ߰.

- forwarders   <ip-address-list>
  ڽſ  Ǹ ٸ  ѱ  մϴ. ip-address-list 
  κп  ip   ˴ϴ. տ   ׾    
    ̷ Ǹ Ѱ ϴ. ڽ   Ǹ  
  168.126.127.250 IP    ѱ ʹٸ ̷ ϸ ˴ϴ.

  forwarders    168.126.127.250

- include   <file>
  ٸ   Խŵϴ. ? primary  secondry  
  ϰ named.boot    ҷ  ϸ  ϰ. ( 
  ұ?)

- options
   ɼ ֽϴ. (  ϴ°͵ ±׶ ؾ ϳ? 
   ҷ ϴ°... ƽôº?)

  options   <option>

  + forward-only
    ׳ forwarders       ÿ ڽ 
    Ӽ  ϰ Ǵµ (Ʈ   Ǹ ϰ ٽ Ž
    縦 ϴ°.) forward-only ɼ   װ͸  ʽϴ.
          ϰ ׳  ϴ. (
    ༮ )

  + query-log
    ڽſԷ   Ǹ syslog  ϰ ˴ϴ. (syslog  
    װ ޾Ƽ /var/log/message  ϰ) α   
    Ŀϴ. ^^

  + debug
     ޼  ݴϴ. Ӽ     ְ.



  (zone) 

 /var/named 丮 ̵غ. named.boot  linux.sarang.net
    ִ ̶  linux.zone   
鼭 Ÿ  ⺻  ˾ƺ .

------------------------------- linux.zone ------------------------------------

@               IN      SOA     ns.linux.sarang.net.    root.linux.sarang.net.
(
                        1998020700      ;Serial
                        10800           ;Refresh
                        3600            ;Retry
                        3600000         ;Expire
                        43200           ;Minimum
)

                IN      NS      ns.linux.sarang.net.

                IN      A       168.126.127.250
                IN      HINFO   "Interm Pentium" "ALzzA Linux"


localhost       IN      A       127.0.0.1
ns              IN      A       168.126.127.250
www             IN      A       168.126.127.250
w3              IN      CNAME   @
irc             IN      CNAME   @
ftp             IN      CNAME   @
news            IN      CNAME   @

-------------------------------------------------------------------------------

  ϴ   Ģ ֽϴ.  Ģ  
ۼϱ⸸ Ѵٸ ƹ  ϴ. ^^   3   Record  
 ϴ. SOA, NS, ׸ ׿  ϳ ϳ ˾ ƾ ?

- SOA Records
    ( )   κб SOA κԴϴ.

  @             IN      SOA     ns.linux.sarang.net.  root.linux.sarang.net.
  (
                        1998020700      ;Serial
                        10800           ;Refresh
                        3600            ;Retry
                        3600000         ;Expire
                        43200           ;Minimum
  )

   κ  Ӽ   ʰ ˴ϴ.  ־ ϰ 
   ȵǴ κԴϴ. ⼭  ִ   θ, 
  primary Ӽ,  ̸, ׸ secondary  ִ , 
   TTL ð մϴ. ó   ˾  ұ.

  @             IN      SOA     ns.linux.sarang.net.  root.linux.sarang.net

  ⼭ @  ߴ   Īմϴ. named.boot Ͽ 
  ־?

  primary         linux.sarang.net                linux.zone

   κ    . ׷ϱ   Ͽ @ 
  linux.sarang.net.  Ÿ Ǵ Դϴ. (ѰͿ  ٸ.) 
  @ ſ linux.sarang.net.    ϴ.

----- "."  ߿伺 -----------------------------------------------------------

  Ѱ ߿  ֽϴ. Ÿ  鶧  Ǽϱ  κ 
  "." Դϴ. ̰   ʴĿ  Ӽ  ư 
  ƴϸ      ο  . "."  
   ν  θ̶  Ÿ ִ Դϴ. "." 
   ֻ ̶    ߾. ( ϽǷ?) ࿡ 
   @ ſ linux.sarang.net.  ´ٰ Ҷ  "."  ٰ 
  ϸ?  ̷  .

  linux.sarang.net       IN     SOA     ns.linux.sarang.net. .....

  ̷ Ǹ  Ӽ νϱ ̷ ν Դϴ.

  linux.sarang.net.linux.sarang.net.     IN         SOA .....

  հ ? ߴ  θ ڿ ½ پ ϴ. ̷  
   ư? SOA κ ƴ϶ ٸ  κп  Դϴ.

-------------------------------------------------------------------------------

  SOA   Record  (type) ϴ κԴϴ. (  ѱ
  ϱ.)   ִµ   帮ڽϴ.

  + SOA
       authority  Ѵٰ ϴµ  ܾ ü  
    ѱ۷ ٲܱ?

  + NS
      Ҷ ̱.

  + A
    θ -> IP ּҸ Ҷ Դϴ.

  + PTR
    IP -> θ Ҷ .

  + CNAME
    (alias) Ҷ Դϴ.

  + MX
     ͽü մϴ. ߿   .

    ˸  ̷  ص ˴ϴ.   ϴ. ! 
  ̰ ׸ϰ  SOA ʵ鿡   ؾ߰ڳ׿.  ð 
  ٰ ֽϴ.

   ns.linux.sarang.net. κ primary Ӽ  ˴ϴ. ׸ 
   root.linux.sarang.net.   ̸ ּԴϴ. Ӽ 
   ְų ܺο ڿ ϰ   ̰  ϰ 
  ǰ.   ̸  Ͱ  Ʋ. root@linux.sarang.net.
  ̷  ٵ .  ׷? մϴ. Ӽ Ÿ 
  Ͽ @  ٸ ǹ̷  ֱ .   ݾƿ. ^^ 
  (ѹ !  "."   .)

   Ѿϴ.   Ѿϴ.   5ñ. ̸Ϸ 
   °  ±.  "You are a real turkey!"   
  ִ±.  ϴ Ҹ ƿ.  T_T

  (
                        1998020700      ;Serial
                        10800           ;Refresh
                        3600            ;Retry
                        3600000         ;Expire
                        43200           ;Minimum
  )

   κ  ߿ κ̸鼭  ʿ  ִ κԴϴ. Serial
   Expire  primary <-> secondary  ʿ κ̶ ø ˴ϴ. 
  (  ȵ˴ϴ.)

  + Serial
      ? Ÿϴ. secondary  primary  Ÿ 
     ö 켱 primary  serial ȣ ޶ û ϰ ˴ϴ. 
    ׸ ڽ  Ÿ serial ȣ ٸ  Ÿ 
    ޾ƿ ˴ϴ. ų ٸ ŵ   ϰ ű⼭ ׳ 
    ϴ. ^^

     ¥+ڸ   ˴ϴ.  ˾ƺ  .  
    ƴٴ  ^^ ׻ Ӽ   Ŀ serial ȣ ϳ 
    ÷ִ  ñ ٶϴ. ߿ secondary  ϰ ǰ 
    ׷ 3  ȸɲϴ.

  + Refresh
    secondary  ο  ûҶ ð մϴ. ʴ 
    ϴµ ⿡  ð Ŀ secondary  primary  
    ŵ  ִ ϰ .

  + Retry
     ״ õ ϴ°Դϴ. primary   Ҽ  ⿡ 
     ðĿ ٽ  õϰ ˴ϴ.

  + Expire
    Ⱓ ̻ primary   Ѵٸ  Դ 
    ı Ⱓ մϴ.

     primary   ϴ°. secondary 
  ޾ƿ   κ о ״ ൿ  Դϴ.  ϳ  
  ص Ǵ Դϴ.

  + Menium TTL(Time to Live)
     ִ κԴϴ. Ӽ ѹ ãҴ  ؼ ĳ 
    մϴ.  鼭  ϴ°  . Ӽ 
    linux.sarang.net  ã´ٰ սô. ׷ Ʈ   켱 Ǹ 
    ̰ sarang.net   Ӽ ns.sarang.net ̶° ˾Ƴ
    ̰ linux.sarang.net   Ӽ ns.linux.sarang.net ̶ 
      Դϴ.   ٽ www.sarang.net  ã´ٰ Ѵٸ 
     Ʈ  Ǹ ؼ ó ãƼ ñ? ׷ 
    ʽϴ. ̹ sarang.net   Ӽ ns.sarang.net ̶  
    ĳؼ  ֱ  sarang.net  ο  ִ 
    www.sarang.net  ã Ѵٸ ٷ ns.sarang.net  Ǹ ϰ ˴ϴ. 
    ϳ ȶ. ׸ ٽ ѹ linux.sarang.net  ã´ٰ ϸ ̹ 
    ׳ ڽ ĳ  ݴϴ. (̰  Ӽ  ĵ 
     Ⱓ   ͳݻ  Դϴ.)

    TTL  ̳ĸ ٸ  ڽ     
    ĳ   󸶳 ӹ̳ĸ մϴ. 3600 ʷ شٸ  
      ٸ Ӽ Ȯ 3600  Ŀ ĳ  
     Դϴ. ׸    ûѴٸ ó ٽ ã 
     Դϴ. ׷ ü ̰  մ ϱ ñϽ е 
     ϴ. ٸ  ĳ ڽ  󸶳   
        ƴ϶ ʿ Ѵٴ . ( ? 
     մµ ^^) ð Ե ªԵ    Դϴ.

----- TTL ð  -----------------------------------------------------------

    TTL ð ª Ѵٸ  ġ ª ðȿ ٸ  
    ο    Դϴ. ٸ ĳ     
    ؼ ǰ  . dyn.ml.org   TTL Ÿ  ª
      Դϴ. ̳ IP   PPP ڵ  ο 
    ϴ°̱  ؼ  ٲ ǰ ִ   Ѿ 
    ϱ . (Ƹ 5   ϴ.)

    ð   Ѵٸ   ٸ  ĳ  
    Դϴ. ڽ Ӽ  ׾ ִٰ ص   
    Դϴ. ׷  Ͽ    ŵǱ  
    ð  ɸ. ( ġ մϴ.)  43200 ~ 86400(1) 
     ؼ ϰ ˴ϴ.  ڽ Ӽ 뵵  
    ؾ߰.    ô?

-------------------------------------------------------------------------------

  + NS Records
    Ӽ ϴ κԴϴ.    Ӽ  
    굵 Ҷ ϰ ˴ϴ.

    linux.sarang.net.   IN      NS      ns.linux.sarang.net.

    ̷ κ ɰԴϴ. linux.sarang.net. ("."     
    ̶° Ͻ!!!)   Ӽ 
    ns.linux.sarang.net ̶ Ͽϴ.  ʹ  ٸ 
    ?

    @           IN      SOA ...
    (
                
    )
                IN      NS      ns.linux.sarang.net.

    ̷   . Ȱ ǥԴϴ. @     
    Ÿٴ° Ͻ.   linux.sarang.net.  Ÿ.

    linux.sarang.net.           IN      NS      ns.linux.sarang.net
    (linux.sarang.net. )  IN      HINFO   i586    linux
    (           ''           )  IN      A       168.126.127.250

    www                         IN      CNAME   @

    ̷  www  "IN   A  ..." κб linux.sarang.net.  
       κ ˴ϴ.  NS κе տ @   
    Ǿ Ǿ ֱ  @      Ǵ .


~~~~~ 굵  [] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

      е ϴ° ߿ ϳ ü 굵  
    ϲϴ. sarang.net ̶    ִٰ սô. 
    linux.sarang.net  굵 ְ ͽϴ. Ӽ 
    168.126.127.250 IP   ִ  ϱ.

    ns.linux.sarang.net.        IN      A       168.126.127.250
    linux.sarang.net.           IN      NS      ns.linux.sarang.net.

    ? 켱 Ӽ  IP   ns.linux.sarang.net ̶ 
     ο߽ϴ. ( ns  ϴ°  ƴ.  ̰ 
    Ӽ  ˾   ׷  Դϴ.) ׸
    linux.sarang.net.   Ӽ ns.linux.sarang.net ̶ 
    . ϳ , ns.linux.sarang.net  Ӽ  Ҷ  
    θ ´ IP ּҰ ־ .   Ұϴϱ. 
     . Ӽ  ο  IP  Դϴ.

    ʹ linux.sarang.net  (zone) ؼ ns.linux.sarang.net
     Ӽ ϰ ˴ϴ. sarang.net Ӽ  "  
    ༮ ϴ°ž  "  ٻԴϴ. (ڽ  
    Ӽ  ϱ ؼ ڽ  Ӽ ٷ ̷ 
    Ǿ ־ ϴ .)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  ⺻ ΰ Record  ؼ ˾ ñ. ٸ͵  ?

  @             IN      SOA ...
  (
                
  )
                IN      NS      ns.linux.sarang.net.
                IN      A       168.126.127.250
                IN      HINFO   "Interm Pentium" "ALzzA Linux"
                IN      MX 10   mail.linux.sarang.net.
                IN      MX 20   mail.sarang.net.

  localhost     IN      A       127.0.0.1
  ns            IN      A       168.126.127.250
  mail          IN      A       203.251.92.8
  www           IN      A       168.126.127.250
  w3            IN      CNAME   www
  irc           IN      CNAME   @
  ftp           IN      CNAME   @
  news          IN      CNAME   @

  Ұ  ° .  ִ°͸ ϸ  ǰڴ°ɿ? ( PTR 
  .)   .

  A  θ -> IP ּҸ Ѵٰ  Ⱦ. ⼭  κ 
  ׷    .

  ns            IN      A       168.126.127.250

   κ .  ̻? ޶ ns     Ѵٴ 
  ? ns   IP  168.126.127.250 ̶ ϱ? "."  
  Ͻʽÿ.  "."     θ  
  ʰ @  δٰ ߾. ׷ٸ  ̷ ɲϴ.

  ns.linux.sarang.net.  IN      A       168.126.127.250

  ? ߿  ᵵ  . "."   ´ٸ...  
  մϴ.  Ÿ   ̰ Դϴ.  ̻ 
    .  MX  ־.

  ׷ MX  ؼ ̾߱ غ? MX  Mail Exchanger  ڷ ø 
  ˴ϴ. ϴ  Ư η     Ѱ ִ  
  մϴ. ִ   . 

  <doamin>              IN       MX <preference>    <mail server>

  ̷  ˴ϴ. domain κп  θ    
   Ű ˴ϴ. preference κ 켱 ϴµ  MX 
    Ұ쿡 켱  õ  ڸ ָ .
  ڰ   մϴ. mail server  ״ mail server  
   ϴ θ Ǵ IP ּҸ  ְ ˴ϴ. װ  
  Ѱ .

----- MX   ------------------------------------------------------------

      , ϼ иǾ ִ 찡 
  κ.   ׻ Ƽ 촩  ׷ϴ. (Ƹ 
   NT  ɽϸ ״´ٴ ҹ) 촩 ϼ 
  tiger1.nownuri.net . ̷   Ҽ ? ڵ 
  ID@nownuri.net     tiger1.nownuri.net   
   ٵ . ̰ ٷ MX  Դϴ. Ƹ 촩 
  ̷ Ǿ ְ.

  nownuri.net.          IN      MX 0    tiger1.nownuri.net.
  tiger1.nownuri.net.   IN      A       203.238.129.52

  nownuri.net     tiger1.nownuri.net  ѱ 
  Դϴ. ~/.forward   ƽ?  Ű.  ڰ 
  ( ó) ڱ׸ϰ Ӽ ٸ  MX  ʿ ʽϴ. 
   Ѵ뿡   ϰ ε ڱ 翬    
     ڳ. 

   MX  °  .  츦 ѹ ?

  hitel.net       preference = 10, mail exchanger = mail.hitel.net
  hitel.net       preference = 200, mail exchanger = mail.UU.NET

  ΰ MX   ֽϴ. (nslookup  ſ. ׷ uu.net ϰ 
   谡 ִٰ  MX  Ǿ ִ°?) 켱 hitel.net 
    mail.hitel.net  Ѱ ˴ϴ. mail.hitel.net   
  ٸ  켱  mail.uu.net   ޵ǰ ˴ϴ.   
   ״´ٸ  ݼ۵ǰų ϼ Ƴ  ϰ 
  ǰ. ⺻ ϼ ϳ   Ҷ ̷ 
   ְ.

-------------------------------------------------------------------------------

  ,  ߴ "You are a real turkey!"    ΰ   . 
  (  û̱!  ̷. T_T) CNAME  ٽ½ Ѱ  
  ߽ϴ. θ Ҷ ΰ  ֽϴ. ϳ  IP ּҸ
  ϴ ̰  ϳ ̹  ο alias  Ŵ ̴ϴ. CNAME 
  .

  www           IN      A       168.126.127.250
  w3            IN      CNAME   www

    www  ּҰ 168.126.127.250  Ǿ ְ w3  www  alias 
   Ǿ . w3   õص Ȱ168.126.127.250   ǰ
  ˴ϴ.  θٰ ΰ ٲ  ƴ ó Դϴ.

  Ѱ   ִٸ @  alias  ɸ ȵȴٴ Դϴ. @  ϴ
    ̴ٸ ٽ  ö󰡼  ñ ٶ󱸿.

  www           IN      A       168.126.127.250
  @             IN      CNAME   www

  ̷ @  alias  ع 쿡 secondary ʿ  
  Ÿ  մϴ. nslookup  ls  ϵ θ
   .  secondary   ʴ´ٸ  ص 
   ϴ.

----- ý л -------------------------------------------------------------

   IP  ؼ  θ ο Ҷ  CNAME   ϴ  
  ƴմϴ.    168.126.127.250  ü  ޶پ ִ
  ^^ Ȱ IP   ൵   ϳ ο  
  IP  οص   ϴ.

  home.taegu.net.          IN    A        203.251.92.86
                           IN    A        203.251.92.190
                           IN    A        203.251.92.9

  nslookup    Ȯ غ?

  # nslookup home.taegu.net
  Server:  localhost
  Address:  127.0.0.1

  Name:    home.taegu.net
  Addresses:  203.251.92.86, 203.251.92.190, 203.251.92.9

    . ̷ ϸ  찡 ߻ϴ? home.taegu.net
    õϰ Ǹ  3 IP  ư鼭  õϰ 
  ˴ϴ. İ ý л ̷ °. ( home.taegu.net 
   ׷ ư ֽϴ. NFS  ڷḦ ϰ CPU  лŰ
  .)

  ping   غ?

  [root@linux /root]# ping -c 1 home.taegu.net
  PING home.taegu.net (203.251.92.9): 56 data bytes
  64 bytes from 203.251.92.9: icmp_seq=0 ttl=59 time=174.4 ms

  [root@linux /root]# ping -c 1 home.taegu.net
  PING home.taegu.net (203.251.92.86): 56 data bytes
  64 bytes from 203.251.92.86: icmp_seq=0 ttl=58 time=173.9 ms

  [root@linux /root]# ping -c 1 home.taegu.net
  PING home.taegu.net (203.251.92.190): 56 data bytes
  64 bytes from 203.251.92.190: icmp_seq=0 ttl=59 time=173.9 ms

  Ȱ θε ping  õҶ IP ּҰ ٲ. 촩, 
  , ڳݵ  ̷ ϸ   лŰ.  
  ǥ    Ⱦϴ microsoft  ϲϴ. nslookup 
  www.microsoft.com ̶ ߴ 16 IP  µǴ±. (   
  180밡  پ ִٰ ϴ) ϰ  ɸ ɸ ϴ. (ݵ
   ϰ. )

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

   ϴ 迡  սô. HINFO  κе . Hardware Info 
   Ǵ°ε ϵ   ִ Դϴ.

  linux.sarang.net.     IN      HINFO   "Interm Pentium" "ALzzA Linux"

  ̷  ־ nslookup  캸 ̷ ɴϴ.

  linux.sarang.net        CPU = Interm Pentium    OS = ALzzA Linux

   ϴ ½   ʽϱ?

 reverse map 

    Ӽ Ÿ  (type)  ̴° PTR ϳ  
  ұ. ̰ Ϸ 0.0.127.in-addr.arpa     local.rev
     ڳ׿.

----- local.rev ---------------------------------------------------------------

@               IN      SOA     localhost.      root.localhost.
(
                        1998020700      ;Serial
                        28800           ;Refresh
                        14400           ;Retry
                        3600000         ;Expire
                        86400           ;Minimum
)
                IN      NS      localhost.

1               IN      PTR     localhost.

-------------------------------------------------------------------------------

   . local.rev  0.0.127.in-addr.arpa  IP   
   ִ°  ⼭ @  0.0.127.in-addr.arpa  Ÿڱ.
      ִ ϰ  SOA Record  NS Record  
   .

  Ӱ ̴°   ۿ . 1 ̶ ䷷  ϳ  
  ֱ.  "."   ʾ ڿ   ƴ  IP 
  پ ڱ. ̷ ٲ㾵 ְڴµ.

  1.0.0.127.in-addr.arpa.    IN    PTR  localhost.

  .in-addr.arpa   Ųٷ  127.0.0.1  . loopback IP ּҰ 
  Ǵ±. 127.0.0.1 IP  θ localhost  ְ ִ .
   մϴ. 0.0.127.in-addr.arpa  ƴ϶ ϳ  ִ 
  127.126.168.in-addr.arpa  쵵 Դϴ.   IP  
  ٲپִ κ̶ ̰  ܿ Ʋ  ϴ.  IP   
  Ӽ  IP  ϴ Ӽ Ҽ ְ Ʋ .
  ( "." ٽ ѹ ϼ.) , 1  տ ĭ  
  ȵ˴ϴ. ϼ.

----- Ӽ reverse map --------------------------------------------------

뿡 ¸ ġ  ڽ    Ѱ ߿ 
 ˰ Ǿϴ.   ֿ̿  縦... ^^ reverse mapping 
  ʴ ׷ϱ IP   ã   쿡   
߻մϴ.  ĸ Ӽ ̿Ҽ  Ǵ Դϴ. ( ū
. ^^)

Ӽ IP  168.126.127.250 ̶  IP  ´  ã   
  Ҽ  Ǵ . ! ڽ Ӽ ܺο IP
ּҷ  ã°  ʴ´ٰ ص  ϴ. Į̶ 
ã  ˴ϴ.   Ӽ ⺻ ٸ ڽ  ִ
 ˷ְ Ǵϱ.

   reverse map    ð Ӽ ο 
  ñ ٶϴ.

-------------------------------------------------------------------------------

2.2.3. root server cache 

   ϳ  ҽϴ. Ʈ Ӽ   ִ , 
   ٿ  ̸ named.root  Ǵ±.

----- named.root --------------------------------------------------------------

;       This file holds the information on root name servers needed to
;       initialize cache of Internet domain name servers
;       (e.g. reference this file in the "cache  .  <file>"
;       configuration file of BIND domain name servers).
;
;       This file is made available by InterNIC registration services
;       under anonymous FTP as
;           file                /domain/named.root
;           on server           FTP.RS.INTERNIC.NET
;       -OR- under Gopher at    RS.INTERNIC.NET
;           under menu          InterNIC Registration Services (NSI)
;              submenu          InterNIC Registration Archives
;           file                named.root
;
;       last update:    Aug 22, 1997
;       related version of root zone:   1997082200
;
;
; formerly NS.INTERNIC.NET
;
.                        3600000      NS    A.ROOT-SERVERS.NET.
A.ROOT-SERVERS.NET.      3600000      A     198.41.0.4
;
; formerly NS1.ISI.EDU
;
.                        3600000      NS    B.ROOT-SERVERS.NET.
B.ROOT-SERVERS.NET.      3600000      A     128.9.0.107
;
; formerly C.PSI.NET
;

                        

.                        3600000      NS    M.ROOT-SERVERS.NET.
M.ROOT-SERVERS.NET.      3600000      A     202.12.27.33
; End of File

-------------------------------------------------------------------------------

   ּ    Ҽ ִ° ˷ ְ . ռ 
  Ѵ ftp://rs.internic.net/domain  Ҽ ֽϴ.    
  ִµ  ϴ  ۼ ʿ䰡  .  ų ̹
  ִ   ˴ϴ. ^^

    . ణ ϰ  Ƽ ׷  캻 ϵ
  Ʋ ϴ.

  .                        3600000      NS    A.ROOT-SERVERS.NET.
  A.ROOT-SERVERS.NET.      3600000      A     198.41.0.4

  .  Ӽ A.ROOT-SERVER.NET. ̰ A.ROOT-SERVER.NET 
  IP ּҰ 198.41.0.4  ֱ. ׷  Ǿ ִ Ϳ 
  Ұմϴ. Ӱ ̴° IN ſ 3600000 ̶ ε ̰ ռ 
  ߴ TTL(Time to Live) Դϴ.     Ÿ  
  ü Ǵ ̰  ô°  θ ؼ   
  ϴ Դϴ.  Ÿ  ?    ϴ. ϱ
   κ Ű? غ. (̸Ϸ ϶  ˾?)


----- caching only name server -------------------------------------------------

caching only name server  ϴ  ϱ.  ߴ Ӽ 
 ũ ΰ  ٸ ٸ κ  ã  Ͱ ڽ
  ˷ ִ°  ְ. caching only name server   
ൿ  Դϴ.  ڽ  ִ   (resolver) 
ο  IP ּҸ ˱⸦ ûϸ   ãƿͼ ڿ  
ִ Դϴ. caching only name server   2 ϸ ˴ϴ. 
̹ ϼ Ǵµ Ӽ ʱ   /etc/named.boot  
ƮӼ ĳ Դϴ. ƮӼ   ʿ   
 Ǹ ؾ Ұ̱ . ڽ   ʴٸ 𼭵 
 ϱ!

 ܿ loopback   reverse map     ݻ÷ȭԴϴ.
(0.0.127.in-addr.arpa  Ͻô.)

-------------------------------------------------------------------------------

                       [ Ӽ  ã ]

Ӽ   ̻ϰ  ϸ鼭   ʴ´ٸ  
Ͻðڽϱ? ׳   . Դ   ã ذ 
ؾ ٵ   ľϴ   ? װͿ ؼ ˾
 .

 Ӽ Ǵ SIGNAL

kill  Ҷ SIGNAL  ͼϽ 𸣰ڽϴ. -HUP   ƽø
մϴ. restart  reload  ǰ. Ӽ  httpd ó kill 
-HUP  ̿ؼ  ʰ   ų  ֽϴ. װ͸ ƴ϶ 
 ִµ ? .

- HUP
  Ӽ ŸƮ ŵϴ.   ϰ Ǵ . primary 
  Ӽ ڽ  ִ   ϰ ɰ̰ secondary
   primary  ο  ִ  ûϰ  Դϴ.

  killall -HUP named ϸ  pid  ã ʰ ѹ Ҽ ְ. kill -1 
  $(cat /var/run/named.pid) ص ˴ϴ. ^^

- INT
  Ӽ ĳ ϰ ִ  Ϸ (dump) մϴ.
  /usr/tmp/named_dump.db  ̸ ϴ. ޸𸮿  ִ 
   Ϸ  .  Ҳϴ.

- ABRT
     Ȳ Ϸ մϴ. /usr/tmp/named.stats  Ϸ 
  ϵ˴ϴ.

- USR1, USR2
  Ӽ  ״  Ҽ ֽϴ. /usr/tmp/named.run Ϸ 
  ǰ    ˴ϴ. USR1  ѱ  SIGNAL ̰ USR2  
    Դϴ. ó մϴ. T_T

- WINCH
  named.boot  Ҷ option query-log  ϰ ʴϱ? Ӽ 
    Ǹ Ϸ syslogd  ϴ  Ѱ  ֽϴ. ^^
  ʿҶ  ״ ϸ ǰ.

   SIGNAL  ̿ؼ Ӽ  ľҼ ְ. 
̷ ͵  ϰ Ǹ  ȯ ڰ ɼ  .

 syslog  ̿

 ϰ ִ   Ӽ syslogd    ޼ 
/var/log/message  ϵ ʰ Ǿ ֽϴ. /etc/syslogd.conf   
 /var/log/message  ϵ   ǰ ֽϴ.

*.info;mail.none;news.none;authpriv.none                /var/log/messages

info   ޼ mail, news,   κ  κ Ͽ
ϰ Ǿ . Ӽ ޼   ؿ ° ϴ.
̷ ġø Ӽ  ޼ Ǽ  ̴ϴ. ( ٸ 
 ޼ Դϴ.)

*.*;mail.none;news.none;authpriv.none                /var/log/messages

ƴϸ ̷  ֽϴ. ͹̳ tty12     . 
 syslog ޼ tty12 ͹̳η  ޼      
 alt+ctrl+f12 Ű tty12 ͹̳η ȯϿ ǽð ޼ Ȯ  
ֽϴ. (Ӽ ƴ϶   ϴ  ޼ ߿
Դϴ.)

*.*;mail.none;news.none;authpriv.none     <TAB>       /dev/tty12

̷ ټ ְڱ.     ġ  ̴  <TAB> 
 ϼž մϴ. Ӽ Ҷ (Ǵ ٸ ) tty12 ͹̳ 
ֽϰ    ľ  ϴ.

 nslookup, dig

Ӽ ̿ϰ  Ӽ  ã  ⺻ Ǵ 
Դϴ.  ϸ help  ° ε     
Դϴ.. ׿ܿ dig (domain information groper)  α׷ ִµ 
nslookup  ϰ   ִµ    ʾƼ   ׷ 
Ʋ 𸣰ڳ׿. nslookup ϳ   ˾Ƴ  ϱ. ^^

  ޴  °   մϴ. ̰ 
     ϰ ´ٴ°͵  Ӹ .


                         [ Ӽ   ]

ξ  鼭 ȿ Ӽ  ؼ  ڽϴ. 
Դϴ.

   ϰ Ѵٸ 2 ~ 3 Ӽ ʿ մϴ. (ϳ 
־  ư մϴ.  ʽÿ.  ݾƿ.) ʹп  
ûѴٰ ص Ƹ 2 ⺻ Ӽ ϴ  ˰ ֽϴ.

 ΰ Ǵ  Ǵ Ӽ ʿ ϱ?  IP  ã 
Ѵٸ  ӵ Ѵٴ    ƽǲϴ. (  
.)  Ӽ   ٿ ȴٸ ܺο  
ϰ ϴ     ۿ  ˴ϴ.    
ϴ Ӽ ׾ ӵ ϰ IP  ܿ ִ ͵ ƴϰ, 
׷ ϱ ؼ  Ӽ ư  .   
secondary  ؼ  Ÿ ۼ ʿ  primary  
Ÿ  س´ٸ   ǰ. 

ϳ  ʿ 찡 ִٸ  Ʈ ׾Դϴ. ο ִ  
Ӽ Ʈ ׾µ ۵ ұ? Ŷ  ϴµ . 
̷  ؼ ڽ  ƴ ٸ Ʈ Ӽ ϳ ΰ 
Ǵ°.  isp   ޾ ϸ  Ӽ ̷ 뵵 
ϰ ˴ϴ.  ܺ Ӽ secondary  ϰ Ǹ   
  ְ. Ʈ ׾µ  ãƺ  ҿ̳  
ϽǼ  Ӽ θ οϴ° ڽ Ʈ ƴ϶  ƽ?

Ѱ ٸ 츦   .  Ӽ  ū   
ϰ . ū ̶  Ͽ ܰ е а  ̰ л
 ġ ʰ.    ϳ Ӽ Ѵٸ û Ͽ
޸𸮸 ϰ  Դϴ. ̷ 쿡 secondary   ̿ؼ 
 ϸ лŰ ͵  ⺻ ƴұ մϴ.


----- Ӽ   ------------------------------------------------------

                      
                      ߾    primary 
                      
                            
        
                                            
                                            
                        
     ߾Ӽ     
     secondary      
                                            
                            
                                        
                                
                        İ      
                            
                                      
                                      
                                                
                                                
    

                     ܰ  
                     secondary 

------------------------------------------------------------------------------

 ׸° ʹ ׿. ^^ ̷  ִٰ ô. ߾Ӽ 
ϳ Ӽ ִٸ  л û ó ϴ ̸ 
.  ϰ ɸԴϴ. ׷  ׸ó  ܰ뿡 
secondary ν ߾Ӽ Ÿ ޾ƿ Ӽ   ؿ  
  ܰ  Ÿ ̿ؼ secondary  ϰ л
 Ӽ ̿Ѵٸ ߾Ӽ ܺο  ǿ  ܰ 
secondary ν  ð ڷḦ ޶ û ް ˴ϴ. ū ϰ 
ɸ ʰ. ܰ    ûϴ Ÿ ϰ ǰ
 л Ǹ ޾ ó ϰ . ý ϰ ü 
лǴ  ڱ.

̷  ?   û ũ ĳ ϳ Ӽ 
 Ͱ   ̰ . λ ó ÷ 
Ӽ Ű ϴ ϵ ױ. (  е 
.  ϴ° ġ ϴ   Ȱ  .
)

     Ҿ ſ   
ɼ ־ ϴ ٷԴϴ.
