Amazon Web Services - AWS EC2 - Ubuntu 14.04

Reverse zone defines which web page will be opened whe we type IP in browser's adress bar. Also it is important for other internet services like IRC chat.

 

To check your reverse IP zone:

# dig -x 52.28.170.2

 

;; ANSWER SECTION:
2.170.28.52.in-addr.arpa. 300   IN      PTR     ec2-52-28-170-2.eu-central-1.compute.amazonaws.com.

 

If you get ec2-52-28-170-2.eu-central-1.compute.amazonaws.com. and not your domain do the following:

 

Let suppose our IP is 52.28.170.2

1. create /etc/bind/db.reverse file

# vim /etc/bind/db.reverse

$ORIGIN 170.28.52.IN-ADDR.ARPA.
$TTL 14400
@    86400    IN    SOA    ns1.mikosoft.net.    info.mikosoft.net.    (
                        2015062900 ;Serial Number
                        86400 ;refresh
                        7200 ;retry
                        86400 ;expire
                        86400 ;minimum
)

@    86400    IN    NS    ns1.mikosoft.net.
@    86400    IN    NS    ns2.mikosoft.net.

2 IN PTR        mikosoft.net.

 

 

2. add lines in /etc/bind/named.conf.default-zones

//reverse zone
zone "170.28.52.in-addr.arpa" {
       type master;
       file "/etc/bind/db.reverse";
};

 

3. check everything

Now when we type in browser http://52.28.170.2  page http://mikosoft.net should be opened.

Also when we run.

#dig -x 52.28.170.2

2.170.28.52.in-addr.arpa. 161   IN      PTR    mikosoft.net