3 articles tagged "domain name service"

Security Alert: BIND9 DNS Cache Poisoning Bug
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.
Linux Iptables block or open DNS / bind service port 53
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) [...]
Linux: How to setup as DNS client / name server IP address
Many new Linux user finds it difficult to setup / modify new name server address (NS1 / NS2).
Local name resolution is done via /etc/hosts file. If you have small network then use /etc/hosts file. DNS (domain name service is accountable for associating domain names with ip address, for example domain yahoo.com is easy to [...]

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