The remaining items are optional.
-OpenSSH can utilise Pluggable Authentication Modules (PAM) if your system
-supports it. PAM is standard on Redhat and Debian Linux, Solaris and
-HP-UX 11.
+OpenSSH can utilise Pluggable Authentication Modules (PAM) if your
+system supports it. PAM is standard most Linux distributions, Solaris,
+HP-UX 11 and AIX >= 5.2.
NB. If you operating system supports /dev/random, you should configure
OpenSSL to use it. OpenSSH relies on OpenSSL's direct support of
/dev/random. If you don't you will have to rely on ssh-rand-helper, which
is inferior to a good kernel-based solution.
-PAM:
+Linux PAM:
http://www.kernel.org/pub/linux/libs/pam/
+OpenPAM:
+http://www.openpam.org/
+
If you wish to build the GNOME passphrase requester, you will need the GNOME
libraries and headers.
PRNGD:
-If your system lacks Kernel based random collection, the use of Lutz
+If your system lacks kernel-based random collection, the use of Lutz
Jaenicke's PRNGd is recommended.
-http://www.aet.tu-cottbus.de/personen/jaenicke/postfix_tls/prngd.html
+http://prngd.sourceforge.net/
EGD:
Autoconf:
-If you modify configure.ac then you will need autoconf-2.59 to rebuild
-the automatically generated files by running "autoreconf".
+If you modify configure.ac or configure doesn't exist (eg if you checked
+the code out of CVS yourself) then you will need autoconf-2.61 to rebuild
+the automatically generated files by running "autoreconf". Earlier
+version may also work but this is not guaranteed.
http://www.gnu.org/software/autoconf/
+Basic Security Module (BSM):
+
+Native BSM support is know to exist in Solaris from at least 2.5.1,
+FreeBSD 6.1 and OS X. Alternatively, you may use the OpenBSM
+implementation (http://www.openbsm.org).
+
2. Building / Installation
--------------------------
There are a few other options to the configure script:
+--with-audit=[module] enable additional auditing via the specified module.
+Currently, drivers for "debug" (additional info via syslog) and "bsm"
+(Sun's Basic Security Module) are supported.
+
--with-pam enables PAM support. If PAM support is compiled in, it must
also be enabled in sshd_config (refer to the UsePAM directive).