Rebuild corrupter & missing *.db Zone files

Rebuild corrupter & missing *.db Zone files

The Zone files contain namespace details. By default, they are stored in the named working directory located in /var / named/, and each zone file is named in the zone statement according to the file option.

Usually in a manner that relates to the domain in question and identifies the file as containing zone data such as sample.com.zone.

The named service zone files

/var/named/ The working directory is for the named service. The nameserver is not allowed to write to this directory  
/var/named/slaves/ The directory for secondary zones and is writable by the named service  
/var/named/dynamic/ This is for other files, such as dynamic DNS (DDNS) zones or managed DNSSEC keys. It is writable by the named service.  
/var/named/data/ This is for statistics and debugging files and is writable by the named service.

named.conf sometimes gets corrupted on server cPanel.

Here’s the way cPanel servers repair that:

First, move the corrupted “named.conf” using the command below

root@shadowserver[~]# mv /etc/named.conf /etc/named.conf.bak

Create even a copy of the latest zone data just in case anything goes wrong. You can do that by simply executing the following command line

root@shadowserver[~]# cp -rf /var/named /var/named.backup

Now run the cPanel script to rebuild the named.conf

root@shadowserver[~]# /usr/local/cpanel/scripts/rebuilddnsconfig

This script will rebuild all your files of /var/named/*.db.

First, it pulls every client from /var/cpanel/user and collects every user domain and IP address.

It then collects the first 2 nameservers from /etc/wwwacct.conf and reconstructs the zones as they would be if you were to set up this account already.

==================================================================================

#!/usr/bin/perl

# cPlicensing.net – scripts        Copyright(c) 2003 cPlicensing.net.

#                                 All rights Reserved.

# support@cPlicensing.net      http://cPlicensing.net

# Unauthorized copying is prohibited

# Version: 0.01

$nameddir = ‘/var/named’;

$cpanelusers = ‘/var/cpanel/users’;

$wwwacct = ‘/etc/wwwacct.conf’;

print “Rebuild Named Zones Script from cPlicensing.net\n\n”;

print “MAKE SURE YOU BACKUP YOUR EXISTING $nameddir directory\n”;

print “Waiting 5 seconds… press ctrl+c to quit\n”;

sleep 5;

print “\n\n”;

opendir(USERS,”$cpanelusers”);

@CPUSERS=readdir(USERS);

closedir(USERS);

print “Grabbing first 2 NameServers from $wwwacct…”;

open(CONF,”$wwwacct”);

while(<CONF>) {

$_ =~ s/\n//g;

if ($_ !~ /^;/) {

if ($_ =~ /^NS /) {

                        (undef,$nameserver) = split(/ /, $_);

                }

if ($_ =~ /^NS2 /) {

                        (undef,$nameserver2) = split(/ /, $_);

                }

}

}

close(CONF);

print “done.\n”;

print “Rebuilding Zone Files… (cross your fingers)…”;

foreach $cpusers (@CPUSERS) {

chomp;

open(USERDB,”$cpanelusers/$cpusers”);

while(<USERDB>) {

if(/IP=/i) { (undef,$ip) = split(/=/, $_, 2); }

if(/DNS=/i) { (undef,$dns) = split(/=/, $_, 2); }

chomp($ip);

chomp($dns);

}

createzone();

}

print “Done.\n”;

print “\n\nZones have been rebuild but the named.conf has not.\n”;

print “use /scripts/rebuildnamedconf to rebuild the named.conf with\n”;

print “the new zones.  Note that running /scripts/rebuildnamedconf will not\n”;

print “just rebuild the named.conf, you will need to pipe it into the file but\n”;

print “also you need to make sure their are no existing zones in it\n”;

sub createzone(){

$time=time();

$nameddata = <<EOM;

; cPanel 5.x

; Zone file for $domain

@    14400   IN      SOA     $nameserver. hostmaster.$dns. (

                        $time      ; serial, todays date+todays

                        28800           ; refresh, seconds

                        7200            ; retry, seconds

                        3600000         ; expire, seconds

86400 )         ; minimum, seconds

$dns. 14400 IN NS $nameserver.

$dns. 14400 IN NS $nameserver2.

$dns. 14400 IN A $ip

localhost.$dns.   14400    IN A   127.0.0.1

$dns. 14400 IN MX 0 $dns.

mail    14400        IN CNAME    $dns.

www     14400        IN CNAME    $dns.

ftp     14400        IN CNAME    $dns.

EOM

open(VNAMEDF,”>$nameddir/$dns.db”);

print VNAMEDF $nameddata;

close(VNAMEDF);

 }

==================================================================================

Then restart the service “named”.

root@shadowserver[~]#/etc/init.d/named restart

Now we have rebuild corrupter & missing *.db Zone files. If you find any difficulty in fixing feel free to Contact Us.

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