Ghetto DDNS

client.ghetto-ddns.init

#! /bin/bash
#
# ddns       Apply DDNS Configuration on first boot
#
# chkconfig: 2345 09 90
# description: Applies DDNS configuration to DHCP network interfaces
#

# Source function library.
. /etc/init.d/functions

CWD=$(pwd)
cd /etc/sysconfig/network-scripts

. ./network-functions

# find all the interfaces besides loopback.
# ignore aliases, alternative configurations, and editor backup files
interfaces=$(ls ifcfg* | \
	    LANG=C sed -e "$__sed_discard_ignored_files" \
		       -e '/\(ifcfg-lo$\|:\|ifcfg-.*-range\)/d' \
		       -e '/ifcfg-[A-Za-z0-9#\._-]\+$/ { s/^ifcfg-//g;s/[0-9]/ &/}' | \
	    LANG=C sort -k 1,1 -k 2n | \
	    LANG=C sed 's/ //')
rc=0

[ "$EUID" != "0" ] && exit 4
rc=0

vlaninterfaces=""
xdslinterfaces=""
bridgeinterfaces=""

# add the short hostname to the interface configuration as the value for DHCP_HOSTNAME
for i in $interfaces; do
	unset DEVICE TYPE SLAVE
	eval $(LANG=C fgrep "DEVICE=" ifcfg-$i)
	eval $(LANG=C fgrep "TYPE=" ifcfg-$i)
	eval $(LANG=C fgrep "SLAVE=" ifcfg-$i)

	if [ -z "$DEVICE" ] ; then
		DEVICE="$i"; fi

        if LANG=C egrep -L "^DHCP_HOSTNAME=" ifcfg-$i >/dev/null 2>&1 ; then
		sed -i '/DHCP_HOSTNAME/d' ifcfg-$i
        fi

	sed -i '/BOOTPROTO/a DHCP_HOSTNAME='"$(hostname -s)" ifcfg-$i

	[ $? -ne 0 ] && rc=1
done

exit $rc

client.ifcfg-eth1

# vSphere is managing the bulk of this file
HWADDR=00:50:56:8c:8e:3e
NAME=eth1
DNS1=10.250.4.50
DEVICE=eth1
ONBOOT=yes
USERCTL=no
BOOTPROTO=dhcp
DHCP_HOSTNAME=vm-0
PEERDNS=no


check_link_down() {
 return 1;
}

server.db.private.net

$ORIGIN .
$TTL 38400	; 10 hours 40 minutes
private.net		IN SOA	ddns.priate.net. root.ddns.private.net. (
				16         ; serial
				10800      ; refresh (3 hours)
				3600       ; retry (1 hour)
				604800     ; expire (1 week)
				38400      ; minimum (10 hours 40 minutes)
				)
			NS	ddns.private.net.
			A	10.250.4.50
$ORIGIN private.net.
ddns			A	10.250.4.50

server.db.reverse-10.1.1

$ORIGIN .
$TTL 86400	; 1 day
1.1.10.in-addr.arpa	IN SOA	private.net. ddns.private.net. (
				16         ; serial
				28800      ; refresh (8 hours)
				7200       ; retry (2 hours)
				2419200    ; expire (4 weeks)
				86400      ; minimum (1 day)
				)
			NS	ddns.private.net.
$ORIGIN 1.1.10.in-addr.arpa.
1			PTR	ddns.private.net.

server.dhcpd.conf

#
# DHCP Server Configuration file.
#   see /usr/share/doc/dhcp*/dhcpd.conf.sample
#   see 'man 5 dhcpd.conf'
#

include "/etc/rndc.key";

zone private.net. {
    primary 10.1.1.1;
    key rndc-key;
}

zone 1.1.10.in-addr.arpa. {
    primary 10.1.1.1;
    key rndc-key;
}

ddns-updates on;
ddns-domainname "private.net";
ddns-update-style interim;
allow client-updates;
lease-file-name "/var/lib/dhcpd/dhcpd.leases";
authoritative;
default-lease-time    86400;  # 24 Hours
max-lease-time        172800; # 48 Hours

subnet 10.1.1.0 netmask 255.255.255.0 {
    allow client-updates;
    allow unknown-clients;

    ddns-updates on;
    ddns-domainname "private.net";
    ddns-rev-domainname "in-addr.arpa";
    ddns-update-style interim;

    option subnet-mask            255.255.255.0;
    option domain-name            "private.net";
    option domain-name-servers    10.1.1.1;

    range dynamic-bootp 10.1.1.5 10.1.1.250;

}

server.named.conf

//
// named.conf
//
// Provided by Red Hat bind package to configure the ISC BIND named(8) DNS
// server as a caching only nameserver (as a localhost DNS resolver only).
//
// See /usr/share/doc/bind*/sample/ for example named configuration files.
//

include "/etc/rndc.key";

options {
	listen-on port 53 { any; };
	listen-on-v6 port 53 { ::1; };
	directory 	"/var/named";
	dump-file 	"/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        memstatistics-file "/var/named/data/named_mem_stats.txt";
	allow-query     { any; };
	recursion yes;

	dnssec-enable yes;
	dnssec-validation yes;
	dnssec-lookaside auto;

	/* Path to ISC DLV key */
	bindkeys-file "/etc/named.iscdlv.key";

	managed-keys-directory "/var/named/dynamic";
};

logging {
        channel default_debug {
                file "data/named.run";
                severity dynamic;
        };
};

zone "private.net" IN {
	type master;
	file "dynamic/db.private.net";
	allow-update { key rndc-key; };
};

zone "1.1.10.in-addr.arpa" IN {
	type master;
	file "dynamic/db.reverse-10.1.1";
	allow-update { key rndc-key; };
};


controls {
	inet 127.0.0.1 port 953
		allow { 127.0.0.1; } keys { "rndc-key"; };
};

// include "/etc/named.rfc1912.zones";
// include "/etc/named.root.key";