ISC BIND 9.4.2-P2-W1 is now available

Evan Hunt Evan_Hunt at
Thu Sep 4 20:21:45 UTC 2008

	    BIND 9.4.2-P2-W1 is now available.

This is a WINDOWS-SPECIFIC update to the second security patch for BIND
9.4.2.  It addresses long-standing scalability issues in the socket code
for Windows that were exposed by the changes in BIND 9.4.2-P1 and -P2.

This release contains no code changes that are not specific to the Windows
operating system.  It will compile and run correctly on all supported
platforms, but there is no need to upgrade from P2 to P2-W1 unless you
are running BIND on Windows.

NOTE: Effective immediately, the Windows 2000 and Windows NT operating
systems are no longer supported.  This release has been tested and is
supported on Windows 2003, Windows XP, and Windows 2008.

BIND 9.4.2-P2-W1 can be downloaded from

The PGP signature of the distribution is at

The signature was generated with the ISC public key, which is
available at <>.

A binary kit for Windows XP, Windows 2003 and Windows 2008 is at

The PGP signature of the binary kit for Windows XP, Windows 2003, and
Windows 2008 is at

Changes since 9.4.2-P2:

	--- 9.4.2-P2-W1 released ---

2432.	[bug]		More Windows socket handling improvements.  Stop
			using I/O events and use IO Completion Ports
			throughout.  Rewrite the receive path logic to make
			it easier to support multiple simultaneous
			requestrs in the future.  Add stricter consistency
                        checking as a compile-time option (define
                        ISC_SOCKET_CONSISTENCY_CHECKS; defaults to off).

2420.	[bug]		Windows socket handling cleanup.  Let the io
			completion event send out cancelled read/write
			done events, which keeps us from writing to memeory
			we no longer have ownership of.  Add debugging
			socket_log() function.  Rework TCP socket handling
			to not leak sockets.

Evan Hunt -- evan_hunt at
Internet Systems Consortium, Inc.

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