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Introduction
The DNS is a service, whose the purpose is to make the network more convivial, to assign symbolic names ... This guide explains how to install a name server (DNS server). The DNS server (BIND8 version) needs several configuration files for this functioning:
WARNING: the OVH systems have already the configuration. You can also find the standard scripts of compilation on our server: ftp://ftp.ovh.net/made-in-ovh/patch Delete the files and kill the process named Erase the files /etc/named.conf and /etc/named and kill the process named if it exists. type: $ rm -r /var/named/ then $ rm /etc/named.conf Install the bind Server To install bind, we need to install the following rpm bind-8......rpm (use the latest version). Then use this command to install the rpm: rpm -i bind-8.....rpm and the packet caching-nameserver (this packet isn't necessary but it installs the named.conf file and /var/named/named.ca and /var/named/named.local, it also sets named.boot up, which isn't used in the 8 version of bind) It allows to configure a DNS cache (we can compile the source). In addition, it installs also the bind-uti packet, we use it to test the configuration. We obtain the following files: /etc/named.conf: contains the general parameters /var/named/named.ca: indicates the DNS servers root /var/named/named.local: local resolution of loopback addresses According to your needs, you have to create the following files: /var/named/your-domain.com.hosts: this file associates an Ip address and a system name Configuration of named.conf file /etc/named.conf / generated by named-bootconf.pl // // a caching only nameserver config // options { directory "/var/named"; }; controls { inet 127.0.0.1 allow { localhost; } keys { rndckey; }; }; zone "." IN { type hint; file "named.ca"; }; zone "localhost" IN { type master; file "localhost.zone"; allow-update { none; }; }; zone "0.0.127.in-addr.arpa" IN { type master; file "named.local"; allow-update { none; }; }; include "/etc/rndc.key"; Configuration of named.ca file /var/named/named.ca ; 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 . ; 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 IN 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 C.ROOT-SERVERS.NET. C.ROOT-SERVERS.NET. 3600000 A 192.33.4.12 ; ; formerly TERP.UMD.EDU ; . 3600000 NS D.ROOT-SERVERS.NET. D.ROOT-SERVERS.NET. 3600000 A 128.8.10.90 ; ; formerly NS.NASA.GOV ; . 3600000 NS E.ROOT-SERVERS.NET. E.ROOT-SERVERS.NET. 3600000 A 192.203.230.10 ; ; formerly NS.ISC.ORG ; . 3600000 NS F.ROOT-SERVERS.NET. F.ROOT-SERVERS.NET. 3600000 A 192.5.5.241 ; ; formerly NS.NIC.DDN.MIL ; . 3600000 NS G.ROOT-SERVERS.NET. G.ROOT-SERVERS.NET. 3600000 A 192.112.36.4 ; ; formerly AOS.ARL.ARMY.MIL ; . 3600000 NS H.ROOT-SERVERS.NET. H.ROOT-SERVERS.NET. 3600000 A 128.63.2.53 ; ; formerly NIC.NORDU.NET ; . 3600000 NS I.ROOT-SERVERS.NET. I.ROOT-SERVERS.NET. 3600000 A 192.36.148.17 ; ; temporarily housed at NSI (InterNIC) ; . 3600000 NS J.ROOT-SERVERS.NET. J.ROOT-SERVERS.NET. 3600000 A 198.41.0.10 ; ; housed in LINX, operated by RIPE NCC ; . 3600000 NS K.ROOT-SERVERS.NET. K.ROOT-SERVERS.NET. 3600000 A 193.0.14.129 ; ; temporarily housed at ISI (IANA) ; . 3600000 NS L.ROOT-SERVERS.NET. L.ROOT-SERVERS.NET. 3600000 A 198.32.64.12 ; ; housed in Japan, operated by WIDE ; . 3600000 NS M.ROOT-SERVERS.NET. M.ROOT-SERVERS.NET. 3600000 A 202.12.27.33 ; End of File Configuration of named.local file /var/named/named.local $TTL 86400 @ IN SOA localhost. root.localhost. ( 1997022700 ; Serial 28800 ; Refresh (every 8 hours) 14400 ; Retry (every 4 hours) 3600000 ; Expire 86400 ) ; Minimum (Minimal time of life: 24h) IN NS localhost. 1 IN PTR localhost. Configuration of your-domain.com.hosts file /var/named/yourdomain.com.hosts $ttl 86400 yourdomain.com. IN SOA nsxxxxx.ovh.net. webmaster.yourdomain.com. ( 2004011801 21600 3600 604800 86400 ) IN NS nsxxxxx.ovh.net. IN NS ns.ovh.net. IN MX 10 mail.votredomaine. IN A 213.186.32.xx www IN A 213.186.32.xx mail IN A 213.186.32.xx smtp IN A 213.186.32.xx pop IN A 213.186.32.xx pop3 IN A 213.186.32.xx imap IN A 213.186.32.xx sql IN A 213.186.32.xx mysql IN A 213.186.32.xx Configuration of nsswitch.conf /etc/nsswitch.conf passwd: files nisplus shadow: files nisplus group: files nisplus #hosts: db files nisplus nis dns hosts: files nisplus dns # Example - obey only what nisplus tells us... #services: nisplus [NOTFOUND=return] files #networks: nisplus [NOTFOUND=return] files #protocols: nisplus [NOTFOUND=return] files #rpc: nisplus [NOTFOUND=return] files #ethers: nisplus [NOTFOUND=return] files #netmasks: nisplus [NOTFOUND=return] files bootparams: nisplus [NOTFOUND=return] files ethers: files netmasks: files networks: files protocols: files nisplus rpc: files services: files nisplus netgroup: files nisplus publickey: nisplus #services: nisplus [NOTFOUND=return] files #networks: nisplus [NOTFOUND=return] files #protocols: nisplus [NOTFOUND=return] files #rpc: nisplus [NOTFOUND=return] files #ethers: nisplus [NOTFOUND=return] files #netmasks: nisplus [NOTFOUND=return] files bootparams: nisplus [NOTFOUND=return] files ethers: files netmasks: files networks: files protocols: files nisplus rpc: files services: files nisplus netgroup: files nisplus publickey: nisplus automount: files nisplus aliases: files nisplus Configuration of resolv.conf file (OVH) nameserver 127.0.0.1 nameserver 213.186.xx.xx (IP of your machine) nameserver 213.186.33.99 nslookup The nslookup tool allows to request a name server (DNS server) to have the information on a domain or on a system. By default nslookup uses the name server configured on your system, however you can request an other name server. root@xxx /#nslookup Default Server: localhost because I have a DNS server on my system. Address: 127.0.0.1 help: to have help set type: MX to list all the entries of kind MX (SMTP server of the domain) your domain: the domain name whose you want to have MX Replace MX by the kind of record that you want to have. For example NS for the name servers of a domain, SOA for start of authority, PTR for the reverse, A for a system. To have all the information set type=ANY then the domain name We can also use the ls -t CNAME domain-namec ommand to have all the records of CNAME type. To request another DNS server than your server by default: server NAME 213.186.xx.xx To apply all the changes without reboot : cp -f /etc/resolv.homenet /resolv.conf # (warning with the spaces) /etc/rc.d/init.d/named restart rndc reload Edit a record file 127.0.0 /var/named/named.local $TTL 86400 @ IN SOA localhost. root.localhost. ( 1997022700 ; Serial 28800 ; Refresh 14400 ; Retry 3600000 ; Expire 86400 ) ; Minimum IN NS localhost. 1 IN PTR localhost. Edit a record file localhost /var/named/localhost.zone $TTL 86400 $ORIGIN localhost. @ 1D IN SOA @ root ( 42 ; serial (d. adams) 3H ; refresh 15M ; retry 1W ; expiry 1D ) ; minimum 1D IN NS @ 1D IN A 127.0.0.1 Edit a record file of a domain /var/named/votredomaine.com.hosts $ttl 86400 david.com. IN SOA nsxxxxx.ovh.net. webmaster.yourdomain.com. ( 2004011801 21600 3600 604800 86400 ) IN NS nsxxxxx.ovh.net. IN NS ns.ovh.net. IN MX 10 mail.votredomaine. IN A 213.186.32.xx www IN A 213.186.32.xx mail IN A 213.186.32.xx smtp IN A 213.186.32.xx pop IN A 213.186.32.xx pop3 IN A 213.186.32.xx imap IN A 213.186.32.xx sql IN A 213.186.32.xx mysql IN A 213.186.32.xx Troubleshooting with the bind module Problem with the bind module in webmin on recent installations: you have error messages about "missing servers module" Install servers.wbm (http://www.webmin.com/) |
