DNSを構築してみる(Cent. OS6. Bind. 9. 8). 自宅に仮想環境でたくさんOSを立て始めたので、DNSサーバを立ててみた。. Hyper- V上で構築したCent. OS6. 4上に、BIND 9. 8を使う。. DNSサーバ(公開はしない). ・IPv. IPv. 6は使わない). ・折角なので、キャッシュサーバ機能を持たせてみる. Package 3. 2: bind- 9. ROOTDIR=/var/named/chroot. OPTIONS="- 4"< < この"- 4"はIPv. IPv. 6の無効化)。# vi /etc/named. IPアドレスを指定する。指定なしの場合は全てのIPでリスンする// listen- on port 5. IPv. 6を無効化するのでポートは閉鎖 use- v. DNS SECを無効化する// dnssec- enable yes; // dnssec- validation yes; dnssec- enable no; dnssec- validation no; dnssec- lookaside auto; /* Path to ISC DLV key */ bindkeys- file "/etc/named. IN {// type hint; // file "named. ![]() First make repo nano /etc/yum.repos.d/centalt.repo [CentALT] name=CentALT Packages for Enterprise Linux 5 - $basearch baseurl=http://centos.alt.ru/repository/centos/5. Step 4: Chroot Caching-Only DNS. 8. If you want to run the DNS caching-server under chroot environment, you need to install the chroot package only, no need of. ![]() What is Webmin? Webmin is a web-based interface for system administration for Unix. Using any modern web browser, you can setup user accounts, Apache, DNS, file.DNSキャッシュサーバ用設定view localhost_resolver { match- clients { localhost; }; match- destinations { localhost; }; recursion yes; include "/etc/named. LAN用設定view "internal" { match- clients { localnets; }; match- destinations { localnets; }; recursion yes; include "/etc/named. IPv. 6は使わないので、コメントアウト#zone "1. IN {# type master; # file "named. TTL 8. IN SOA ns. Serial 2. Refresh 1. Retry 3. Expire 8. Minimum IN NS ns. IN A 1. IN A 1. IN A 1. IN A 1. IN A 1. IN CNAME nswww IN CNAME svr. IN CNAME svr. TTL 8. 64. 00@ IN SOA ns. Serial 2. Refresh 1. Retry 3. Expire 8. Minimum IN NS ns. IN PTR hayachi. IN A 2. IN PTR router. IN PTR svr. IN PTR svr. IN PTR svr. IN PTR svr. Add. Unix. Listen. Socket /var/named/chroot/dev/log< < # service rsyslog reload. Filesystem Size Used Avail Use% マウント位置/dev/mapper/Vol. Group- lv_root. 8. G 2. 8. G 5. 3. G 3. 5% /proc 0 0 0 - /procsysfs 0 0 0 - /sysdevpts 0 0 0 - /dev/ptstmpfs 2. G 0 2. 9. G 0% /dev/shm/dev/sda. M 4. 7M 4. 14. M 1. 1% /bootnone 0 0 0 - /proc/sys/fs/binfmt_misc/etc/named 8. G 2. 8. G 5. 3. G 3. 5% /var/named/chroot/etc/named/var/named 8. G 2. 8. G 5. 3. G 3. 5% /var/named/chroot/var/named/etc/named. G 2. 8. G 5. 3. G 3. 5% /var/named/chroot/etc/named. G 2. 8. G 5. 3. G 3. 5% /var/named/chroot/etc/named. G 2. 8. G 5. 3. G 3. 5% /var/named/chroot/etc/rndc. G 2. 8. G 5. 3. G 3. 5% /var/named/chroot/usr/lib. G 2. 8. G 5. 3. G 3. 5% /var/named/chroot/etc/named. G 2. 8. G 5. 3. G 3. 5% /var/named/chroot/etc/named. Di. G 9. 8. 2rc. 1- Red. Hat- 9. 8. 2- 0. 1. Got answer: ;; - > > HEADER< < - opcode: QUERY, status: NOERROR, id: 7. QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1; ; QUESTION SECTION: ;router. IN A; ; ANSWER SECTION: router. IN A 1. AUTHORITY SECTION: hayachi. IN NS ns. ADDITIONAL SECTION: ns. IN A 1. Query time: 0 msec; ; SERVER: 1. WHEN: Sun Sep 1 0. MSG SIZE rcvd: 8. DNS問い合わせが遅い. その後外向けのDNS解決が遅いことに気が付いた。. ISPのDNSに変更をしてみたところ速くなった。.
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