Increase incoming SMTP command buffer size from 512 to 2048 (see RFC

[users/jgh/exim.git] / doc / doc-txt / NewStuff

diff --git a/doc/doc-txt/NewStuff b/doc/doc-txt/NewStuff
index fc613073cdf91bc636d2af0f942db3dd131ed5ce..827c5d1dce664164bab87beb954e99829498907b 100644 (file)
--- a/doc/doc-txt/NewStuff
+++ b/doc/doc-txt/NewStuff
@@ -1,4 +1,4 @@
-$Cambridge: exim/doc/doc-txt/NewStuff,v 1.26 2005/02/17 12:24:00 ph10 Exp $
+$Cambridge: exim/doc/doc-txt/NewStuff,v 1.27 2005/03/08 11:38:21 ph10 Exp $
 
 New Features in Exim
 --------------------
@@ -9,6 +9,37 @@ updated when there is a relatively large batch of changes). The doc/ChangeLog
 file contains a listing of all changes, including bug fixes.
 
 
+Version 4.51
+------------
+
+PH/01. The format in which GnuTLS parameters are written to the gnutls-param
+       file in the spool directory has been changed. This change has been made
+       to alleviate problems that some people had with the generation of the
+       parameters by Exim when /dev/random was exhausted. In this situation,
+       Exim would hang until /dev/random acquired some more entropy.
+
+       The new code exports and imports the DH and RSA parameters in PEM
+       format. This means that the parameters can be generated externally using
+       the certtool command that is part of GnuTLS.
+
+       To replace the parameters with new ones, instead of deleting the file
+       and letting Exim re-create it, you can generate new parameters using
+       certtool and, when this has been done, replace Exim's cache file by
+       renaming. The relevant commands are something like this:
+
+         # rm -f new.params
+         # touch new.params
+         # chown exim:exim new.params
+         # chmod 0400 new.params
+         # certtool --generate-privkey --bits 512 >new.params
+         # echo "" >>new.params
+         # certtool --generate-dh-params --bits 1024 >> new.params
+         # mv new.params params
+
+       If Exim never has to generate the parameters itself, the possibility of
+       stalling is removed.
+
+
 Version 4.50
 ------------