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HylaFAX The world's most advanced open source fax server

HylaFAX 4.2.4 release

The HylaFAX development team is pleased to announce our 4.2.4 patch level release! As always, our sincerest thanks go to all who participate and provide feedback.

This document is intended to describe the significant differences between hylafax-4.2.4 and older releases, point out any known incompatibilites and issues, and provide the reader with directions to further resources regarding HylaFAX.


  • Security fix - hfaxd vulnerability CVE-2005-3538
  • Security fix - script vulnerability CVE-2005-3539
  • PAM support on Solaris
  • Local/GMT timezone support in JOBFMT/RECVFMT formatters
  • Numerous other enhancements and bugfixes (see CHANGES)


  • Please refer to HylaFAX Bugzilla for a detailed list of issues.


  • Some modem config files generated from earlier versions' config file prototypes may contain Class1TCFRecvHack. This is no longer desireable for production use, and this feature should now only be used for debugging purposes.
  • The time value of %Z in jobfmt/recvfmt is now returned in GMT time when GMT is requested, and in local time when local time is requested. Previously, %Z was always returned in local time, even if GMT had been requested.
  • If upgrading from any releases other than 4.2.2 or 4.2.3, be advised that CIDName/CIDNumber are now part of a larger CallID framework.
  • libtiff-3.6.1 is fatally flawed when dealing with Group 3 images. Don't use it as-is. See:


  • For security reasons, everyone should consider upgrading to this 4.2.4 release as soon as possible.


Binary packages for some operating systems and platforms are available. Please see:

If you are able and willing to produce a binary package of HylaFAX for general distribution, and one is not already available for your platform/OS, then you are invited to add it to the Binary_Packages wiki page at


HylaFAX has numerous public support resources available. The user is encouraged to utilize the manpage documentation before turning to other support arenas. However, if other support is desired, or if you would like to actively take part in the HylaFAX community, you are invited to:

Join and participate in a HylaFAX mailing list


When corresponding about this software, please always specify:

  • what version of HylaFAX you have,
  • what system you're running on (if it is Linux please name the distribution)
  • if the problem is modem-related, identify it and the firmware rev For example: "HylaFAX v4.0pl2 under RedHat Linux 4.2 with gcc 2.7.2; ZyXEL 1496E with 6.11a firmware."

Read the on-line documentation and resources


Review HylaFAX CVS


Report confirmed bugs, feature requests, and submit patches



The HylaFAX development team

This page was last edited on 6 January 2006, at 14:56.

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