dns server

I would like to see the Time-to-live (TTL) value for a ‘AAAA’ and A record for domains. How do I see Time-to-live (TTL) for a DNS record under Unix or Linux operating systems using command line options?


Q. How do I stop recursion (recursive query) under BIND 9 DNS server?

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I’ve nameserver like ns1.example.com and ns2.example.com. I’d like to provide Vanity DNS for each domain such as ns1.yourdomain.com and ns2.yourdomain.com. Basically, my users should able to call my dns server as their own servers. This will create the illusion that my user run their own name servers. How do I setup vanity DNS using BIND 9 under UNIX / Linux?


How do I verify that my ISP or my own recursive resolvers are free from DNS cache poisoning bug that is promised full disclosure of the flaw by Dan on August 7 at the Black Hat conference? How do I test my dns server for DNS cache pollution or DNS Cache Poisoning bug?


Q. I just got Linux installed on my system. I’m able to connect to internet via IP address only. I’m not able to find out information about setting up new DNS sever ip under Linux. How do I configure primary and secondary DNS via terminal / shell prompt? A. Under Linux / UNIX / BSD […]


Q. How do I turn on DNS server logging so that I can see all the queries on my CentOS 4.0 server? A. You can use rndc command which controls the operation of a name server. It supersedes the ndc utility that was provided in old BIND releases. If rndc is invoked with no command […]


Round robin DNS is a technique in which load balancing is performed by a DNS server instead of a strictly dedicated machine. A DNS record has more than one value IP address. When a request is made to the DNS server which serves this record, the answer it gives alternates for each request. For instance, […]