About the DNS
The Domain Name System (DNS) is a distributed internet directory
service. DNS is used mostly to translate between domain names and
IP addresses, and to control email delivery. Most internet services
rely on DNS to work. If DNS fails or is too slow, web sites cannot
be located and email delivery stalls.
A selection of overview documents
explains DNS from a high-level perspective, while the RFC
documents are the official standards.
-
DNS is 25 years old this year. See RFC 881
for Jon Postel's original plan. (According to Paul V. Mockapetris, the
88x RFCs were written after experience with a prototype implementation
in 1983.)
01-Feb-2008
- Net::DNS 0.60, a widely
used Perl module for DNS lookups,
was released on 22-Jun-2007. This fixes input validation errors
that could result in remotely exploitable denial of service.
03-Jul-2007
- BIND 9.4.1 was released on 01-May-2007.
It includes a security fix for a vulnerability that allows remote
denial of service in certain configurations.
14-Jun-2007
- Microsoft
DNS Server is vulnerable to a serious remote attack
via RPC, which allows arbitrary code to be run on
the system. This affects DNS server running on Windows
2000 Server SP4 and Windows 2003 Server SP1/SP2. Microsoft released
patch MS07-029 for this vulnerability on 08-May-2007.
Two workarounds also exist: block requests to the DNS server on TCP
ports 139, 145, as well as 1024 and upwards, or disable the "remote
management over RPC" feature.
14-Jun-2007
- New versions of BIND were released on
25-Jan-2007. 9.2.8 and 9.3.4 include fixes for a cryptographic
vulnerability in Secure DNS and two further security problems.
9.4.0 was released on 24-Feb-2007, and includes a "master-only"
notification type, optional additional section caching for higher
performance, and many new features in the bundled tools.
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Contents
- General
- What is DNS?
- DNS books
- Where to find DNS training
- About DNSRD
- DNS Standards
- DNS-related RFCs
- Current DNS standards activity
- Software
- DNS server software
- Tools (Unix and cross-platform)
- Windows Tools
- DNS programming
- Online info
- Assorted documents
- DNSRD tips
- DNS resource record types
- FAQ and
BIND FAQ
- Newsgroups
- Mailing lists
- Names, registration, root servers
- DNS registration
- Top-level domain names
- Domain name disputes
- Root server hints file
(MD5)
(PGP)
- Name server statistics
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