Bind9 slave server not updating

In this configuration BIND9 will find the answer to name queries and remember the answer for the next query. By caching DNS queries, you will reduce bandwidth and (more importantly) latency.A secondary master DNS server is used to complement a primary master DNS server by serving a copy of the zone(s) configured on the primary server.Domain Name Service (DNS) is an Internet service that maps IP addresses and fully qualified domain names (FQDN) to one another.In this way, DNS alleviates the need to remember IP addresses. Ubuntu ships with BIND (Berkley Internet Naming Daemon), the most widely deployed DNS server.we have installed all required Packages, Now we need to configure the main configuration file of Slave/Secondary DNS Server i.e.to create Forward and Reverse Zones from Slave server end to replicate with Master Server, So follow the below steps to do the same.; host and canonical name records mail IN CNAME ns1.

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( Main Configuration File ), for ( Forward Zone ), rev ( Reverse Zone ) to allow the Query and Zone record transfer to Slave Server.

// options ; logging ; zone "." IN ; include "/etc/named.rfc1912.zones"; include "/etc/key"; ### ELinux Book Internal Zones ### ### Forward Zone ### zone "elinuxbook.com" IN ; ### Reverse Zone ### zone "1.168.192.in-addr.arpa" IN ;

IN A 192.168.1.100 ; mail exchanger record (MX record) IN MX 5 ns1.

// options ; logging ; zone "." IN ; include "/etc/named.rfc1912.zones"; include "/etc/key"; ### Internal DNS Slave Zones ### So we have successfully configured the BIND DNS Service, Now it’s time for testing., We have tools like dig, nslookup to check the DNS service working status. dig [[email protected] ~]# nslookup Server: 127.0.0.1 Address: 127.0.0.1#53 Name: Address: 192.168.1.100 [[email protected] ~]# nslookup ns1.Server: 127.0.0.1 Address: 127.0.0.1#53 Name: ns1.Address: 192.168.1.100 [[email protected] ~]# nslookup ns2.Server: 127.0.0.1 Address: 127.0.0.1#53 Name: ns2.Address: 192.168.1.101 [[email protected] ~]# nslookup 192.168.1.100 Server: 127.0.0.1 Address: 127.0.0.1#53 100.1.168.192.name = ns1.

[[email protected] ~]# nslookup 192.168.1.101 Server: 127.0.0.1 Address: 127.0.0.1#53 101.1.168.192.name = ns2.

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