June 29th, 2010
by Vicky Karmakar, Jr. Software Engineer, Bobcares.com
DNS is for the Internet, what oxygen is for life. Though we constantly use it, we are unaware of its presence. DNS has come a long way since Stanford Research Institute’s Network Information Center (SRI-NIC) maintained a file called hosts.txt which contained host-names and their corresponding IP addresses, to a complex network of databases called name-servers.
DNS was originally designed to make it easier for us to memorize names (host-names) rather than numbers (IP addresses). Gradually, many applications and protocols used the host-names and IP addresses as a basis to authenticate the host. Thus DNS security came into being, since wrong information from a DNS server, can disallow a legitimate request from a legitimate client.
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Tags: DNS, Poisoning
Posted in Security, Server administration, Uncategorized No Comments »
April 22nd, 2007
April 22nd, 2007
Smbind is a PHP-based software tool for managing DNS zones for BIND via the web interface. This supports the per-user administration of zones, error checking, and a PEAR DB database backend.
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Tags: DNS
Posted in DNS 20 Comments »
December 30th, 2005
December 30th, 2005
I’ve learned that there is nothing more peaceful than a sleeping child - Anonymous, Age 30
To an Internet Administrator, there is nothing more peaceful than a stable and optimized DNS server. The moment there is a wrong configuration, the server wakes up and starts crying, sites and email goes down. An important part of keeping DNS that way is properly setting up the SOA records.
What are DNS Records. DNS records or Zone files are used for mapping URLs to an IPs. Located on servers called the DNS servers, these records are typically the connection of your website with the outside world. Requests for your website are forwarded to your DNS servers and then get pointed to the WebServers that serve the website or to Email servers that handle the incoming email.
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Tags: DNS
Posted in DNS 8 Comments »
December 27th, 2005
December 27th, 2005
MX stands for Mail Exchange Records. MX records are used in DNS records(or Zone files) to specify how email should be routed.
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Tags: DNS
Posted in DNS 9 Comments »
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