DNS設定やり直し

http://www.maradns.org/tutorial/dangling.htmlを読んでなえる。そもそもにnic足す必要ないじゃん。:0すればいいのだから。まあ、内向きと外向きでhardを分けるということで。内向きにはIPを２つ付与してあげました。２つ目のNICは将来的にはslaveが導入されたときにslaveのnetworkにつなぐのに使ってあげましょう。

/usr/share/doc/initscripts-8.45.19.1.EL/sysconfig.txtをへろへろ見ていくと、
こんな部分があって、

/etc/sysconfig/network-scripts/ifcfg- and
/etc/sysconfig/network-scripts/ifcfg-::

  The first defines an interface, and the second contains
  only the parts of the definition that are different in a
  "alias" (or alternative) interface.  For example, the
  network numbers might be different, but everything else
  might be the same, so only the network numbers would be
  in the alias file, but all the device information would
  be in the base ifcfg file.

  The items that can be defined in an ifcfg file depend on the
  interface type.  The really obvious ones I'm not going to
  bother to define; you can figure out what "IPADDR" is, I
  think...  :-)

これにしたがって、/etc/sysconfig/network-scriptsに設定を追加。

-rw-r--r-- 5 root root 277 Mar 31 09:22 ifcfg-eth0
-rw-r--r-- 3 root root 257 Apr  1 01:08 ifcfg-eth1
-rw-r--r-- 1 root root 122 Apr  1 01:09 ifcfg-eth1:0
-rw-r--r-- 1 root root 122 Apr  1 01:10 ifcfg-eth1:1

な感じ。再起動して確認。

[nori@housyou]/etc% /sbin/ifconfig
eth0      Link encap:Ethernet  HWaddr 00:19:DB:62:B9:9F
          inet addr:192.168.2.64  Bcast:192.168.2.255  Mask:255.255.255.0
          inet6 addr: fe80::219:dbff:fe62:b99f/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1487 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3466 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:201929 (197.1 KiB)  TX bytes:622530 (607.9 KiB)
          Interrupt:21 Base address:0xa800

eth1      Link encap:Ethernet  HWaddr 00:90:CC:EF:8C:3F
          inet6 addr: fe80::290:ccff:feef:8c3f/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3822 errors:0 dropped:0 overruns:0 frame:0
          TX packets:25 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:306202 (299.0 KiB)  TX bytes:1608 (1.5 KiB)
          Interrupt:17 Base address:0xec00

eth1:0    Link encap:Ethernet  HWaddr 00:90:CC:EF:8C:3F
          inet addr:192.168.2.65  Bcast:192.168.2.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Interrupt:17 Base address:0xec00

eth1:1    Link encap:Ethernet  HWaddr 00:90:CC:EF:8C:3F
          inet addr:192.168.2.66  Bcast:192.168.2.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Interrupt:17 Base address:0xec00

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:1525 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1525 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:2084924 (1.9 MiB)  TX bytes:2084924 (1.9 MiB)

さらに、maradnsの設定をやり直す。http://www.maradns.org/tutorial/dangling.htmlを読むが、

ipv4_bind_addresses = "192.168.1.1"
chroot_dir = "/etc/maradns"
recursive_acl = "192.168.1.0/24"
upstream_servers = "192.168.1.2"

が設定ファイルの文法として間違っていて、http://www.maradns.org/faq.html#upstream_dを読むと、

ipv4_bind_addresses = "192.168.1.1"
chroot_dir = "/etc/maradns"
recursive_acl = "192.168.1.0/24"
upstream_servers = {}
upstream_servers["."] = "192.168.1.2"

と書かねばならない。

[nori@housyou]/etc% dig @192.168.2.65 blog.tonic-water.com

; <<>> DiG 9.3.4-P1 <<>> @192.168.2.65 blog.tonic-water.com
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2585
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;blog.tonic-water.com.          IN      A

;; ANSWER SECTION:
blog.tonic-water.com.   900     IN      CNAME   ghs.google.com.
ghs.google.com.         900     IN      A       72.14.235.121

;; Query time: 12 msec
;; SERVER: 192.168.2.65#53(192.168.2.65)
;; WHEN: Wed Apr  1 01:42:09 2009
;; MSG SIZE  rcvd: 79

これでめでたくLANでprimary dnsに192.168.2.65を指定すればほしいものが引けるようになった。