I just noticed that the sample pg_hba.conf in the docs doesn't contain

any use of CIDR masks - here's a patch that adds  a couple of  sample
lines and associated comments.

Andrew Dunstan

doc/src/sgml/client-auth.sgml

 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/client-auth.sgml,v 1.54 2003/08/16 23:33:49 momjian Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/client-auth.sgml,v 1.55 2003/08/17 04:39:11 momjian Exp $
 -->
 
 <chapter id="client-authentication">
@@ -451,6 +451,11 @@ local   all         all                                             trust
 # TYPE  DATABASE    USER        IP-ADDRESS        IP-MASK           METHOD
 host    all         all         127.0.0.1         255.255.255.255   trust     
 
+# The same as the last line but using a CIDR mask
+#
+# TYPE  DATABASE    USER        IP-ADDRESS/CIDR-mask  METHOD
+host    all         all         127.0.0.1/32          trust     
+
 # Allow any user from any host with IP address 192.168.93.x to connect
 # to database "template1" as the same user name that ident reports for
 # the connection (typically the Unix user name).
@@ -458,6 +463,11 @@ host    all         all         127.0.0.1         255.255.255.255   trust
 # TYPE  DATABASE    USER        IP-ADDRESS        IP-MASK           METHOD
 host    template1   all         192.168.93.0      255.255.255.0     ident sameuser
 
+# The same as the last line but using a CIDR mask
+#
+# TYPE  DATABASE    USER        IP-ADDRESS/CIDR-mask  METHOD
+host    template1   all         192.168.93.0/24       ident sameuser
+
 # Allow a user from host 192.168.12.10 to connect to database
 # "template1" if the user's password is correctly supplied.
 #