domain name service

Dan Kaminsky discovered that properties inherent to the DNS protocol lead to practical DNS cache poisoning attacks. Among other things, successful attacks can lead to misdirected web traffic and email rerouting.

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The domain name service provided by BIND (named) software. It uses both UDP and TCP protocol and listen on port 53. DNS queries less than 512 bytes are transferred using UDP protocol and large queries are handled by TCP protocol such as zone transfer. i) named/bind server – TCP/UDP port 53 ii)Client (browser, dig etc) […]

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Linux DNS Client / Nameserver configuration. Explains how to set or add ISP or your own dns servers to /etc/resolv.conf file to resolve hostnames.

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