The Asterisk Development team has released another beta test release of Asterisk 1.4, 1.4.0-beta3. This release also contains a number of bug fixes, and some improvements to the chan_sip channel driver (for SIP devices) to mitigate the impacts of a certain class of denial-of-service attacks that have recently been published. Note that Asterisk 1.4 is not vulnerable to the chan_skinny exploit that resulted in updated releases of Asterisk 1.0 and Asterisk 1.2. The team has also released Zaptel 1.4.0-beta2 and Asterisk-Addons 1.4.0-beta2; these releases contain only bug fixes and minor improvements. As always, the release files are available on the Digium FTP servers at ftp://ftp.digium.com, in both tarball and patch file form. All of the release files have been signed with our GPG keys and the signature files are available in the same directories as the release files. Thanks for using and supporting Asterisk!