| vikas027 |
03-26-2009 02:59 PM |
Quote:
Originally Posted by dils
(Post 3488627)
hello there
well i have been deploying a linux box as a router for a private network. i have been using Fedora Core 9 as linux distribution. My NAT and DHCP server is already working fine. but now i have a problem setting up a DNS which should point to the actual DNS server of my ISP. the thing is that i don't know how to set up a DNS server. Anyone out there could help me with this. i would be very grateful to u.
cheers
dils
|
Hey,
I have made this script to configure DNS on RHEL machines, may be it works for others too. I am not very sure about this. I have tested it, works fine.
Anyways, here is it. You just need to given a hostname to your linux box like server.vikas.com, and everything else will be handled by the script.
After running the script, run these commands :--
Code:
bind-chroot-admin -d; bind-chroot-admin -e; service named restart
SCRIPT
Code:
mkdir /tmp/my_logs/
exec 2>/tmp/my_logs/dns_error_logs
IP=$(ifconfig eth0 | grep "inet addr" | sed -e 's/^[ \t]*//' | awk -F"Bcast" '{print $1}' | awk -F":" '{print $2}')
IP1=$( echo $IP | awk -F "." '{print $1}' )
IP2=$( echo $IP | awk -F "." '{print $2}' )
IP3=$( echo $IP | awk -F "." '{print $3}' )
IP4=$( echo $IP | awk -F "." '{print $4}' )
echo -n "Please enter your desired hostname (in format like server.example.com) - "
read hname
hname1=$( echo $hname | awk -F "." '{print $1}' )
hname2=$( echo $hname | awk -F "." '{print $2}' )
hname3=$( echo $hname | awk -F "." '{print $3}' )
cp -p /etc/sysconfig/network /etc/sysconfig/network.BACKUP
cp -p /etc/resolv.conf /etc/resolv.conf.BACKUP
sed -i '/HOSTNAME/d' /etc/sysconfig/network
echo "HOSTNAME=$hname" >> /etc/sysconfig/network
hostname $hname
grep $IP /etc/resolv.conf > /dev/null
if [ $? -eq 1 ]
then
echo "nameserver $IP" >> /etc/resolv.conf
fi
# Install needed packages with dependecies
yum -y remove bind* caching-nameserver* system-config-bind*
rm -rf /var/named rm -f /etc/named*
yum -y install bind* caching-nameserver* system-config-bind*
chkconfig named on
# MAKING SKELETON /etc/named.conf
echo "options {" >> /etc/named.conf
echo "listen-on port 53 { 127.0.0.1; };" >> /etc/named.conf
echo "listen-on-v6 port 53 { ::1; };" >> /etc/named.conf
echo "directory "/var/named";" >> /etc/named.conf
echo "dump-file "/var/named/data/cache_dump.db";" >> /etc/named.conf
echo "statistics-file "/var/named/data/named_stats.txt";" >> /etc/named.conf
echo "memstatistics-file "/var/named/data/named_mem_stats.txt";" >> /etc/named.conf
echo "query-source port 53;" >> /etc/named.conf
echo "query-source-v6 port 53;" >> /etc/named.conf
echo "allow-query { localhost; };" >> /etc/named.conf
echo "};" >> /etc/named.conf
echo -e -n "\n" >> /etc/named.conf
echo -e -n "\n" >> /etc/named.conf
echo "zone "localhost" IN {" >> /etc/named.conf
echo "type master;" >> /etc/named.conf
echo "file "localhost.zone";" >> /etc/named.conf
echo "allow-update { none; };" >> /etc/named.conf
echo "};" >> /etc/named.conf
echo -e -n "\n" >> /etc/named.conf
echo "zone "0.0.127.in-addr.arpa" IN {" >> /etc/named.conf
echo "type master;" >> /etc/named.conf
echo "file "named.local";" >> /etc/named.conf
echo "allow-update { none; };" >> /etc/named.conf
echo "};" >> /etc/named.conf
# Correcting entries in /etc/named.conf where double quotes (") are not inserted
sed -i 's/localhost IN/"localhost" IN/' /etc/named.conf
sed -i 's/localhost.zone/"localhost.zone"/' /etc/named.conf
sed -i 's/0.0.127.in-addr.arpa/"0.0.127.in-addr.arpa"/' /etc/named.conf
sed -i 's/named.local/"named.local"/' /etc/named.conf
sed -i 4's|/var/named|"/var/named"|' /etc/named.conf
sed -i 5's|/var/named/data/cache_dump.db|"/var/named/data/cache_dump.db"|' /etc/named.conf
sed -i 6's|/var/named/data/named_stats.txt|"/var/named/data/named_stats.txt"|' /etc/named.conf
sed -i 7's|/var/named/data/named_mem_stats.txt|"/var/named/data/named_mem_stats.txt"|' /etc/named.conf
cp -p /etc/named.conf /etc/named.conf_skel
# Putting new entries in /etc/named.conf
sed -i 2's/127.0.0.1/'$IP1'.'$IP2'.'$IP3'.'$IP4'/' /etc/named.conf
sed -i '/allow-query/d' /etc/named.conf
sed -i '10i\allow-query { IP1.IP2.IP3.0/24; };' /etc/named.conf
sed -i 's/IP1/'$IP1'/' /etc/named.conf
sed -i 's/IP2/'$IP2'/' /etc/named.conf
sed -i 's/IP3/'$IP3'/' /etc/named.conf
sed -i 14's/localhost/'$hname2'.'$hname3'/' /etc/named.conf
sed -i 's/localhost.zone/'$hname2'.fwd/' /etc/named.conf
sed -i 's/0.0.127.in-addr.arpa/'$IP2'.'$IP1'.in-addr.arpa/' /etc/named.conf
sed -i 's/named.local/'$hname2'.rev/' /etc/named.conf
# Copy sample files
cp -p /var/named/localhost.zone /var/named/$hname2.fwd
cp -p /var/named/named.local /var/named/$hname2.rev
# New Reverse Lookup file
sed -i 's/localhost/'$hname'/' /var/named/$hname2.rev
sed -i 2's/localhost/'$hname'/' /var/named/$hname2.rev
sed -i 9's/1/'$IP4'.'$IP3'/' /var/named/$hname2.rev
sed -i 9's/'$hname'./'$hname1'/' /var/named/$hname2.rev
# New Forward Lookup file
head -2 /var/named/$hname2.rev > /var/named/$hname2.fwd.tmp1
cat /var/named/$hname2.fwd.tmp1 /var/named/$hname2.fwd > /var/named/$hname2.fwd.tmp2
cp -p /var/named/$hname2.fwd.tmp2 /var/named/$hname2.fwd
rm -f /var/named/$hname2.fwd.tmp*
sed -i 11's/@/'$hname'./' /var/named/$hname2.fwd
sed -i 's/IN A/'$hname1' &/' /var/named/$hname2.fwd
sed -i 's/127.0.0.1/'$IP1'.'$IP2'.'$IP3'.'$IP4'/' /var/named/$hname2.fwd
sed -i '/IN AAAA/d' /var/named/$hname2.fwd
sed -i '13d' /var/named/$hname2.fwd
grep $IP1 /var/named/$hname2.fwd | sed -e 's/^[ \t]*//' >> /var/named/$hname2.fwd
sed -i '12d' /var/named/$hname2.fwd
sed -i '3d' /var/named/$hname2.fwd
sed -i '3d' /var/named/$hname2.fwd
echo -e -n "\t\t\t\t Reboot or logoff the machine to apply the changes\n and run bind-chroot-admin -d; bind-chroot-admin -e; service named restart"
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