DNS sink hole is a process to identify the bot net master hosting malware software servers and assign the dns record of these hosts to localhost, non-existing or unused ip address . A valid ip is not returned for these host resolution and the infected host never connects to the bot net master server
DNS troubleshooting , this article describes some of the common dns problems and their solutions.
First phase of article describes dns errors relating to configuration , server setup and its basic functionality . Second phase talks about the nslookup related errors when the dns servers seems to be working correctly but names resolution fail . Continue reading “DNS Troubleshooting”
DNS Server Setup & Configuration in Unix
Domain name services resolves names to the ip addresses of clients and vice verse. Domain name system provides a convenient way of finding computer systems in network based on its name and ip address . With increased internet usage and globalization of companies setting up of DNS servers has become a major responsibility of system administrators worldwide . Continue reading “Domain Name Service”