Di sini penulis menganggap instalasi OS CentOS 7 sudah selesai dan rapi…
Sebagain contoh kita akan membuat 2 DNS Server, NS1 sebagai Master dan NS2 sebagai Slave.
ns1.opikdesign.com ip 192.168.56.18
ns2.opikdesign.com ip 172.16.57.11
Config hosts dan hostname…
[root@ns1 ~]# nano /etc/hosts
192.168.56.18 ns1.opikdesign.com ns1 172.16.57.11 ns2.opikdesign.com ns2 127.0.0.1 localhost.ns1.opikdesign.com localhost ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
[root@ns1 ~]# nano /etc/sysconfig/network
NETWORKING=yes HOSTNAME=ns1.opikdesign.com
Atur Firewall, Open Port yang diperlukan
Buka port sebagai berikut…
1. UDP/TCP 953 untuk RNDC
2. UDP/TCP 53 untuk DNS
3. TCP 22 untuk SSH (sebaiknya dirubah)
Tunning system….
[root@ns1 ~]# nano /etc/sysctl.conf
pada paling bawah tambahkan…
net.ipv4.tcp_fin_timeout=15 net.ipv4.tcp_tw_reuse=1 net.ipv4.tcp_tw_recycle=1 vm.swappiness=1
Lakukan matikan yang tidak perlu maupun hapus bind*, update system, dan dan restart…
[root@ns1 ~]# yum remove bind-libs bind-utils -y [root@ns1 ~]# systemctl disable postfix [root@ns1 ~]# systemctl disable rpcbind.socket && systemctl disable rpcbind [root@ns1 ~]# yum upgrade -y [root@ns1 ~]# reboot
Instalasi Dependencies dibutuhkan
Disini cukup melakukan instalasi dengan yum namun menggunakan reprository epel dari Fedora, sebelum memasang repository, install epel-release…
[root@ns1 ~]# yum install -y epel-release
check repository…
[root@ns1 ~]# yum repolist Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * epel: mirror.smartmedia.net.id repo id repo name status !base/7/x86_64 CentOS-7 - Base 9,363 !epel/x86_64 Extra Packages for Enterprise Linux 7 - x86_64 11,483 !extras/7/x86_64 CentOS-7 - Extras 311 !updates/7/x86_64 CentOS-7 - Updates 1,126 repolist: 22,283
Install Dependencies dan aplikasi lainnya yang akan dibutuhkan dalam proses peng-install-an…
[root@ns1 ~]# yum install gcc make net-tools patch tar unzip bzip2 wget nmap lsb openssl openssl-*
Proses Install Bind…
Download source code dan patching-nya
[root@ns1 ~]# wget ftp://ftp.isc.org/isc/bind9/9.11.1/bind-9.11.1.tar.gz [root@ns1 ~]# wget http://www.linuxfromscratch.org/patches/blfs/svn/bind-9.11.1-use_iproute2-1.patch
Decompress dan masuk folder source code
[root@ns1 ~]# tar zxvf bind-9.11.1.tar.gz && cd bind-9.11.1
Proses patching
[root@ns1 ~]# patch -Np1 -i ../bind-9.11.1-use_iproute2-1.patch
Config installation
[root@ns1 ~]# ./configure --prefix=/usr \
--sysconfdir=/etc \
--localstatedir=/var \
--mandir=/usr/share/man \
--enable-threads \
--with-libtool \
--disable-static \
--with-openssl=/usr \
--with-randomdev=/dev/urandom
Proses install…
[root@ns1 ~]# make && make install
[root@ns1 ~]# install -v -m755 -d /usr/share/doc/bind-9.11.1/{arm,misc}
[root@ns1 ~]# install -v -m644 doc/arm/*.html /usr/share/doc/bind-9.11.1/arm
[root@ns1 ~]# install -v -m644 doc/misc/{dnssec,ipv6,migrat*,options,rfc-compliance,roadmap,sdb} /usr/share/doc/bind-9.11.1/misc
Buat UID dan GID dengan folder permission-nya
[root@ns1 ~]# groupadd -g 25 named
[root@ns1 ~]# useradd -c named -g named -s /bin/false -u 25 named
[root@ns1 ~]# install -d -m770 -o named -g named /var/named/chroot
[root@ns1 ~]# mkdir /var/named && mkdir /var/named/chroot
[root@ns1 ~]# cd /var/named/chroot
[root@ns1 ~]# mkdir -p dev etc/namedb/{master,slave,pz} usr/lib/engines var/run/named
[root@ns1 ~]# mknod /var/named/chroot/dev/null c 1 3
[root@ns1 ~]# mknod /var/named/chroot/dev/urandom c 1 9
[root@ns1 ~]# chmod 666 /var/named/chroot/dev/{null,urandom}
[root@ns1 ~]# cp /etc/localtime etc
[root@ns1 ~]# touch /var/named/chroot/managed-keys.bind
[root@ns1 ~]# touch /var/named/chroot/var/run/named.stats
[root@ns1 ~]# chown named.named /var/named/chroot -R
membuat loading script…
[root@ns1 ~]# nano /usr/lib/systemd/system/named.service
[Unit] Description=Berkeley Internet Name Domain (DNS) Wants=nss-lookup.target Before=nss-lookup.target After=network.target [Service] Type=forking EnvironmentFile=/etc/sysconfig/named PIDFile=/var/named/chroot/var/run/named.pid ExecStartPre=/bin/sh -c '/usr/sbin/named-rndc > /var/named/chroot/dev/null 2>&1' ExecStartPre=/usr/sbin/named-checkconf -z /var/named/chroot/etc/named.conf ExecStart=/usr/sbin/named -u named $OPTIONS ExecReload=/bin/sh -c '/usr/sbin/rndc reload > /var/named/chroot/dev/null 2>&1 || /bin/kill -HUP $MAINPID' ExecStop=/bin/sh -c '/usr/sbin/rndc stop > /var/named/chroot/dev/null 2>&1 || /bin/kill -TERM $MAINPID' PrivateTmp=true [Install] WantedBy=multi-user.target
[root@ns1 ~]# nano /usr/sbin/named-rndc
rndc-confgen -r /dev/urandom -b 512 > /etc/rndc.conf sed '/conf/d;/^#/!d;s:^# ::' /etc/rndc.conf > /var/named/chroot/etc/named.root.key chown named.named /var/named/chroot/etc/named.root.key
[root@ns1 ~]# nano /etc/sysconfig/named
OPTIONS="-c /var/named/chroot/etc/named.conf.options"
Loding script agar bisa di panggil langusng dan saat booting juga bisa memanggil service tersebut
[root@ns1 ~]# chmod +x /usr/sbin/named-rndc [root@ns1 ~]# systemctl daemon-reload [root@ns1 ~]# systemctl enable named.service
Check versi hasil instalasi…
[root@ns1 ~]# named -v
BIND 9.11.1
[root@ns2 ~]# named-checkconf -v
9.11.1
[root@ns1 ~]# named-checkzone -v
9.11.1
[root@ns1 ~]# dig -v
DiG 9.11.1
Config pada Master Server (NS1)
Generate RNDC
[root@ns1 ~]# rndc-confgen -r /dev/urandom -b 512 > /etc/named.root.key [root@ns1 ~]# sed '/conf/d;/^#/!d;s:^# ::' /etc/named.root.key > /var/named/chroot/etc/named.root.key
Config named.conf.options
[root@ns1 ~]# nano /var/named/chroot/etc/named.conf.options
options {
directory "/var/named/chroot/etc/namedb";
pid-file "/var/named/chroot/var/run/named.pid";
statistics-file "/var/named/chroot/var/run/named.stats";
dump-file "/var/named/chroot/var/run/cache_dump.db";
allow-query { any; };
auth-nxdomain no; // conform to RFC1035
listen-on-v6 { any; };
allow-transfer { 172.16.57.11; };
};
acl trusted-servers {
192.168.56.18; //ns1
172.16.57.11; //ns2
};
logging {
category default { default_syslog; default_debug; };
category unmatched { null; };
channel default_syslog {
syslog daemon;
severity info;
};
channel default_debug {
file "named.run";
severity dynamic;
};
channel default_stderr {
stderr;
severity info;
};
channel null {
null;
};
};
include "/var/named/chroot/etc/named.root.key";
include "/var/named/chroot/etc/named.rfc1912.zones";
include "/var/named/chroot/etc/named.zones";
Config named.rfc192.zones yang berisi zona localhost maupun forward ke server dns sedunia
[root@ns1 ~]# nano /var/named/chroot/etc/named.rfc1912.zones
zone "." {
type hint;
file "root.hints";
};
zone "0.0.127.in-addr.arpa" {
type master;
file "pz/127.0.0";
allow-update { none; };
allow-transfer { trusted-servers; };
};
zone "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" IN {
type master;
file "pz/named.ip6.local";
allow-update { none; };
allow-transfer { trusted-servers; };
};
zone "255.in-addr.arpa" IN {
type master;
file "pz/named.broadcast";
allow-update { none; };
allow-transfer { trusted-servers; };
};
zone "0.in-addr.arpa" IN {
type master;
file "pz/named.zero";
allow-update { none; };
allow-transfer { trusted-servers; };
};
zone "localdomain" IN {
type master;
file "pz/localdomain.zone";
allow-update { none; };
allow-transfer { trusted-servers; };
};
zone "localhost" IN {
type master;
file "pz/localhost.zone";
allow-update { none; };
allow-transfer { trusted-servers; };
};
Buat zone localhost/localdomain dan PTR-nya tersebut…
[root@ns1 ~]# nano /var/named/chroot/etc/namedb/pz/localdomain.zone
$TTL 86400
@ IN SOA localhost root (
42 ; serial (d. adams)
3H ; refresh
15M ; retry
1W ; expiry
1D ) ; minimum
IN NS localhost
localhost IN A 127.0.0.1
localhost IN AAAA ::1
[root@ns1 ~]# nano /var/named/chroot/etc/namedb/pz/localhost.zone
$TTL 86400
@ IN SOA @ root (
42 ; serial
3H ; refresh
15M ; retry
1W ; expiry
1D ) ; minimum
IN NS @
IN A 127.0.0.1
IN AAAA ::1
[root@ns1 ~]# nano /var/named/chroot/etc/namedb/pz/named.broadcast
$TTL 86400
$TTL 86400
@ IN SOA localhost. root.localhost. (
42 ; serial
3H ; refresh
15M ; retry
1W ; expiry
1D ) ; minimum
IN NS localhost.
[root@ns1 ~]# nano /var/named/chroot/etc/namedb/pz/named.ip6.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.
[root@ns1 ~]# nano /var/named/chroot/etc/namedb/pz/named.zero
$TTL 86400
@ IN SOA localhost. root.localhost. (
42 ; serial
3H ; refresh
15M ; retry
1W ; expiry
1D ) ; minimum
IN NS localhost.
[root@ns1 ~]# nano /var/named/chroot/etc/namedb/pz/127.0.0
$TTL 3D
@ IN SOA ns.local.domain. hostmaster.local.domain. (
1 ; Serial
8H ; Refresh
2H ; Retry
4W ; Expire
1D) ; Minimum TTL
NS ns.local.domain.
1 PTR localhost.
Generate forward ke DNS Server sedunia…
[root@ns1 ~]# dig +bufsize=1200 +norec NS . @a.root-servers.net > /var/named/chroot/etc/namedb/root.hints
Membuat zone domain…
[root@ns1 ~]# nano /var/named/chroot/etc/named.zones
zone "56.168.192.in-addr.arpa" IN {
type master;
file "master/56.168.192.rev";
allow-update { trusted-servers; };
allow-transfer { trusted-servers; };
};
zone "57.16.172.in-addr.arpa" IN {
type master;
file "master/57.16.172.rev";
allow-update { trusted-servers; };
allow-transfer { trusted-servers; };
};
zone "opikdesign.com" IN {
type master;
file "master/opikdesign.com.zone";
allow-update { trusted-servers; };
allow-transfer { trusted-servers; };
};
sebagai contoh, hosting web server www.opikdesign.com berada di IP 192.168.56.10; sedangkan mail hosting IP 172.16.57.200
[root@ns1 ~]# nano /var/named/chroot/etc/namedb/master/opikdesign.com.zone
$TTL 3600 ; 1 hour
@ IN SOA ns1.opikdesign.com. admin.opikdesign.com. (
2016030230 ; serial
10800 ; refresh (3 hours)
3600 ; retry (1 hour)
1209600 ; expire (2 week)
86400 ; minimum (1 day)
)
;
IN NS ns1.opikdesign.com.
IN NS ns2.opikdesign.com.
IN MX 10 mail.opikdesign.com.
ns1 IN A 192.168.56.18
ns2 IN A 172.16.57.11
IN A 192.168.56.10
mail IN A 172.16.57.200
smtp IN CNAME mail.opikdesign.com.
smtps IN CNAME mail.opikdesign.com.
pop3 IN CNAME mail.opikdesign.com.
pop3s IN CNAME mail.opikdesign.com.
imap IN CNAME mail.opikdesign.com.
imaps IN CNAME mail.opikdesign.com.
www IN CNAME opikdesign.com.
_dmarc.opikdesign.com. IN TXT "v=DMARC1; p=none; rua=mailto:admin@opikdesign.com; ruf=mailto:admin@opikdesign.com; fo=1; rf=afrf; pct=100; ri=86400"
opikdesign.com. IN TXT "v=spf1 include:mail.opikdesign.com ~all"
mail.opikdesign.com. IN TXT "v=spf1 ip4:172.16.57.200/32 ~all"
[root@ns1 ~]# nano /var/named/chroot/etc/namedb/master/56.168.192.rev
$TTL 3600 ; 1 hour
@ IN SOA ns1.opikdesign.com. admin.opikdesign.com. (
2016030230 ; serial
10800 ; refresh (3 hours)
3600 ; retry (1 hour)
1209600 ; expire (2 week)
86400 ; minimum (1 day)
)
;
IN NS ns1.opikdesign.com.
IN NS ns2.opikdesign.com.
10 IN PTR opikdesign.com.
18 IN PTR ns1.opikdesign.com.
[root@ns1 ~]# nano /var/named/chroot/etc/namedb/master/57.16.172.rev
$TTL 3600 ; 1 hour
@ IN SOA ns1.opikdesign.com. admin.opikdesign.com. (
2016030230 ; serial
10800 ; refresh (3 hours)
3600 ; retry (1 hour)
1209600 ; expire (2 week)
86400 ; minimum (1 day)
)
;
IN NS ns1.opikdesign.com.
IN NS ns2.opikdesign.com.
11 IN PTR ns2.opikdesign.com.
200 IN PTR mail.opikdesign.com.
setiap config atau merubah config biasakan rubah user kepemilikkan folder config…
[root@ns1 ~]# chown named.named /var/named/chroot -R
selanjutnya jalankan service named-nya
[root@ns1 ~]# systemctl start named.service
check service-nya jalan tidak…
[root@ns1 ~]# systemctl status named.service
● named.service - Berkeley Internet Name Domain (DNS)
Loaded: loaded (/usr/lib/systemd/system/named.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2017-04-26 11:45:07 WIB; 4h 49min ago
Process: 7902 ExecStop=/bin/sh -c /usr/sbin/rndc stop > /var/named/chroot/dev/null 2>&1 || /bin/kill -TERM $MAINPID (code=exited, status=0/SUCCESS)
Process: 7923 ExecStart=/usr/sbin/named -u named $OPTIONS (code=exited, status=0/SUCCESS)
Process: 7919 ExecStartPre=/usr/sbin/named-checkconf -z /var/named/chroot/etc/named.conf.options (code=exited, status=0/SUCCESS)
Process: 7911 ExecStartPre=/bin/sh -c /usr/sbin/named-rndc > /var/named/chroot/dev/null 2>&1 (code=exited, status=0/SUCCESS)
Main PID: 7924 (named)
CGroup: /system.slice/named.service
└─7924 /usr/sbin/named -u named -c /var/named/chroot/etc/named.conf.options
test, rubah nameserver-nya… kemudian tester dengan nslookup ke semua domain
[root@ns1 ~]# nano /etc/resolv.conf
search ns1.opikdesign.com nameserver 127.0.0.1
[root@ns1 ~]# nslookup google.com
Server: 127.0.0.1 Address: 127.0.0.1#53 Non-authoritative answer: Name: google.cOm Address: 74.125.24.138 Name: google.cOm Address: 74.125.24.100 Name: google.cOm Address: 74.125.24.139 Name: google.cOm Address: 74.125.24.101 Name: google.cOm Address: 74.125.24.113 Name: google.cOm Address: 74.125.24.102 Name: google.cOm Address: 2404:6800:4003:c03::8b
Config pada Slave Server (NS2)
Config hosts dan hostname…
[root@ns2 ~]# nano /etc/hosts
192.168.56.18 ns1.opikdesign.com ns1 172.16.57.11 ns2.opikdesign.com ns2 127.0.0.1 localhost.ns2.opikdesign.com localhost ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
[root@ns2 ~]# nano /etc/sysconfig/network
NETWORKING=yes HOSTNAME=ns2.opikdesign.com
Generate RNDC
[root@ns2 ~]# rndc-confgen -r /dev/urandom -b 512 > /etc/named.root.key [root@ns2 ~]# sed '/conf/d;/^#/!d;s:^# ::' /etc/named.root.key > /var/named/chroot/etc/named.root.key
Config named.conf.options
[root@ns2 ~]# nano /var/named/chroot/etc/named.conf.options
options {
directory "/var/named/chroot/etc/namedb";
pid-file "/var/named/chroot/var/run/named.pid";
statistics-file "/var/named/chroot/var/run/named.stats";
dump-file "/var/named/chroot/var/run/cache_dump.db";
allow-query { any; };
auth-nxdomain no; // conform to RFC1035
listen-on-v6 { any; };
allow-transfer { 192.168.56.18; };
};
acl trusted-servers {
192.168.56.18; //ns1
172.16.57.11; //ns2
};
logging {
category default { default_syslog; default_debug; };
category unmatched { null; };
channel default_syslog {
syslog daemon;
severity info;
};
channel default_debug {
file "named.run";
severity dynamic;
};
channel default_stderr {
stderr;
severity info;
};
channel null {
null;
};
};
include "/var/named/chroot/etc/named.root.key";
include "/var/named/chroot/etc/named.rfc1912.zones";
include "/var/named/chroot/etc/named.zones";
Config named.rfc192.zones yang berisi zona localhost maupun forward ke server dns sedunia
[root@ns2 ~]# nano /var/named/chroot/etc/named.rfc1912.zones
zone "." {
type hint;
file "root.hints";
};
zone "0.0.127.in-addr.arpa" {
type master;
file "pz/127.0.0";
allow-update { none; };
allow-transfer { trusted-servers; };
};
zone "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" IN {
type master;
file "pz/named.ip6.local";
allow-update { none; };
allow-transfer { trusted-servers; };
};
zone "255.in-addr.arpa" IN {
type master;
file "pz/named.broadcast";
allow-update { none; };
allow-transfer { trusted-servers; };
};
zone "0.in-addr.arpa" IN {
type master;
file "pz/named.zero";
allow-update { none; };
allow-transfer { trusted-servers; };
};
zone "localdomain" IN {
type master;
file "pz/localdomain.zone";
allow-update { none; };
allow-transfer { trusted-servers; };
};
zone "localhost" IN {
type master;
file "pz/localhost.zone";
allow-update { none; };
allow-transfer { trusted-servers; };
};
Buat zone localhost/localdomain dan PTR-nya tersebut…
[root@ns2 ~]# nano /var/named/chroot/etc/namedb/pz/localdomain.zone
$TTL 86400
@ IN SOA localhost root (
42 ; serial (d. adams)
3H ; refresh
15M ; retry
1W ; expiry
1D ) ; minimum
IN NS localhost
localhost IN A 127.0.0.1
localhost IN AAAA ::1
[root@ns2 ~]# nano /var/named/chroot/etc/namedb/pz/localhost.zone
$TTL 86400
@ IN SOA @ root (
42 ; serial
3H ; refresh
15M ; retry
1W ; expiry
1D ) ; minimum
IN NS @
IN A 127.0.0.1
IN AAAA ::1
[root@ns2 ~]# nano /var/named/chroot/etc/namedb/pz/named.broadcast
$TTL 86400
$TTL 86400
@ IN SOA localhost. root.localhost. (
42 ; serial
3H ; refresh
15M ; retry
1W ; expiry
1D ) ; minimum
IN NS localhost.
[root@ns2 ~]# nano /var/named/chroot/etc/namedb/pz/named.ip6.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.
[root@ns2 ~]# nano /var/named/chroot/etc/namedb/pz/named.zero
$TTL 86400
@ IN SOA localhost. root.localhost. (
42 ; serial
3H ; refresh
15M ; retry
1W ; expiry
1D ) ; minimum
IN NS localhost.
[root@ns2 ~]# nano /var/named/chroot/etc/namedb/pz/127.0.0
$TTL 3D
@ IN SOA ns.local.domain. hostmaster.local.domain. (
1 ; Serial
8H ; Refresh
2H ; Retry
4W ; Expire
1D) ; Minimum TTL
NS ns.local.domain.
1 PTR localhost.
Generate forward ke DNS Server sedunia…
[root@ns2 ~]# dig +bufsize=1200 +norec NS . @a.root-servers.net > /var/named/chroot/etc/namedb/root.hints
Membuat zone domain…
[root@ns2 ~]# nano /var/named/chroot/etc/named.zones
zone "56.168.192.in-addr.arpa" IN {
type slave;
file "slave/56.168.192.rev";
masters { 192.168.56.18; };
allow-transfer { trusted-servers; };
};
zone "57.16.172.in-addr.arpa" IN {
type slave;
file "slave/57.16.172.rev";
masters { 192.168.56.18; };
allow-transfer { trusted-servers; };
};
zone "opikdesign.com" IN {
type slave;
file "slave/opikdesign.com.zone";
masters { 192.168.56.18; };
allow-transfer { trusted-servers; };
};
Semenjak bind versi 9.9.8, slave akan membuat file db zones sendiri dengan meniru master-nya, jadi tiap kali merubah record domain maupun menambah domain cukup dilakukan di server master saja.
Jangan lupa setiap config atau merubah config biasakan rubah user kepemilikkan folder config…
[root@ns2 ~]# chown named.named /var/named/chroot -R
selanjutnya jalankan service named-nya
[root@ns2 ~]# systemctl start named.service
check service-nya jalan tidak…
[root@ns2 ~]# systemctl status named.service
● named.service - Berkeley Internet Name Domain (DNS)
Loaded: loaded (/usr/lib/systemd/system/named.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2017-04-26 11:48:07 WIB; 4h 49min ago
Process: 7902 ExecStop=/bin/sh -c /usr/sbin/rndc stop > /var/named/chroot/dev/null 2>&1 || /bin/kill -TERM $MAINPID (code=exited, status=0/SUCCESS)
Process: 7923 ExecStart=/usr/sbin/named -u named $OPTIONS (code=exited, status=0/SUCCESS)
Process: 7919 ExecStartPre=/usr/sbin/named-checkconf -z /var/named/chroot/etc/named.conf.options (code=exited, status=0/SUCCESS)
Process: 7911 ExecStartPre=/bin/sh -c /usr/sbin/named-rndc > /var/named/chroot/dev/null 2>&1 (code=exited, status=0/SUCCESS)
Main PID: 7924 (named)
CGroup: /system.slice/named.service
└─7924 /usr/sbin/named -u named -c /var/named/chroot/etc/named.conf.options
test, rubah nameserver-nya… kemudian tester dengan nslookup ke semua domain
[root@ns2 ~]# nano /etc/resolv.conf
search ns1.opikdesign.com nameserver 127.0.0.1
[root@ns2 ~]# nslookup google.com
Server: 127.0.0.1 Address: 127.0.0.1#53 Non-authoritative answer: Name: google.com Address: 74.125.24.138 Name: google.com Address: 74.125.24.100 Name: google.com Address: 74.125.24.139 Name: google.com Address: 74.125.24.101 Name: google.com Address: 74.125.24.113 Name: google.com Address: 74.125.24.102 Name: google.com Address: 2404:6800:4003:c03::8b