How Secure Is DNS and BIND?
The way DNS was (and is) run was not very secure. Running the latest recommended version of BIND is the very least you should do. If you're running any version of BIND 4 or a version of BIND 8 that's not current, you're open to numerous weaknesses in the code. The most threatening thing in old versions of BIND is how easy it is to feed it bogus information, known as spoofing or poisoning. It would then spread this bad information on to its clients. If you consider how important DNS information is for many (most?) of the security mechanisms used in UNIX, this is quite chilling. Spoofing or poisoning is still possible, but it's much harder now, and by configuring DNS restrictively, it can be made even more difficult. ...
Get Concise Guide to DNS and BIND, The now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
