doc/doc-txt/NewStuff

   1 $Cambridge: exim/doc/doc-txt/NewStuff,v 1.27 2005/03/08 11:38:21 ph10 Exp $
   2
   3 New Features in Exim
   4 --------------------
   5
   6 This file contains descriptions of new features that have been added to Exim,
   7 but have not yet made it into the main manual (which is most conveniently
   8 updated when there is a relatively large batch of changes). The doc/ChangeLog
   9 file contains a listing of all changes, including bug fixes.
  10
  11
  12 Version 4.51
  13 ------------
  14
  15 PH/01. The format in which GnuTLS parameters are written to the gnutls-param
  16        file in the spool directory has been changed. This change has been made
  17        to alleviate problems that some people had with the generation of the
  18        parameters by Exim when /dev/random was exhausted. In this situation,
  19        Exim would hang until /dev/random acquired some more entropy.
  20
  21        The new code exports and imports the DH and RSA parameters in PEM
  22        format. This means that the parameters can be generated externally using
  23        the certtool command that is part of GnuTLS.
  24
  25        To replace the parameters with new ones, instead of deleting the file
  26        and letting Exim re-create it, you can generate new parameters using
  27        certtool and, when this has been done, replace Exim's cache file by
  28        renaming. The relevant commands are something like this:
  29
  30          # rm -f new.params
  31          # touch new.params
  32          # chown exim:exim new.params
  33          # chmod 0400 new.params
  34          # certtool --generate-privkey --bits 512 >new.params
  35          # echo "" >>new.params
  36          # certtool --generate-dh-params --bits 1024 >> new.params
  37          # mv new.params params
  38
  39        If Exim never has to generate the parameters itself, the possibility of
  40        stalling is removed.
  41
  42
  43 Version 4.50
  44 ------------
  45
  46 The documentation is up-to-date for the 4.50 release.
  47
  48 ****