tlsmgr   Début   Suivant   Sommaire   Préc.page.lue   Accueil
Section: Maintenance Commands (8)
Sommaire  



NAME   Début   Précédent   Suivant   Sommaire   Préc.page.lue   Accueil
tlsmgr - Postfix TLS session cache and PRNG manager  



SYNOPSIS   Début   Précédent   Suivant   Sommaire   Préc.page.lue   Accueil
tlsmgr [generic Postfix daemon options]
 



DESCRIPTION   Début   Précédent   Suivant   Sommaire   Préc.page.lue   Accueil
The tlsmgr(8) manages the Postfix TLS session caches. It stores and retrieves cache entries on request by smtpd(8) and smtp(8) processes, and periodically removes entries that have expired.

The tlsmgr(8) also manages the PRNG (pseudo random number generator) pool. It answers queries by the smtpd(8) and smtp(8) processes to seed their internal PRNG pools.

The tlsmgr(8)'s PRNG pool is initially seeded from an external source (EGD, /dev/urandom, or regular file). It is updated at configurable pseudo-random intervals with data from the external source. It is updated periodically with data from TLS session cache entries and with the time of day, and is updated with the time of day whenever a process requests tlsmgr(8) service.

The tlsmgr(8) saves the PRNG state to an exchange file periodically and when the process terminates, and reads the exchange file when initializing its PRNG.  




SECURITY   Début   Précédent   Suivant   Sommaire   Préc.page.lue   Accueil


The tlsmgr(8) is not security-sensitive. The code that maintains
the external and internal PRNG pools does not "trust" the
data that it manipulates, and the code that maintains the
TLS session cache does not touch the contents of the cached
entries, except for seeding its internal PRNG pool.

The tlsmgr(8) can be run chrooted and with reduced privileges. At process startup it connects to the entropy source and exchange file, and creates or truncates the optional TLS session cache files.

With Postfix version 2.5 and later, the tlsmgr(8) no longer uses root privileges when opening cache files. These files should now be stored under the Postfix-owned data_directory. As a migration aid, an attempt to open a cache file under a non-Postfix directory is redirected to the Postfix-owned data_directory, and a warning is logged.  




DIAGNOSTICS   Début   Précédent   Suivant   Sommaire   Préc.page.lue   Accueil
Problems and transactions are logged to the syslog daemon.  



BUGS   Début   Précédent   Suivant   Sommaire   Préc.page.lue   Accueil
There is no automatic means to limit the number of entries in the TLS session caches and/or the size of the TLS cache files.  



CONFIGURATION PARAMETERS   Début   Précédent   Suivant   Sommaire   Préc.page.lue   Accueil


Changes to main.cf are not picked up automatically,
because tlsmgr(8) is a persistent processes.  Use the
command "postfix reload" after a configuration change.

The text below provides only a parameter summary. See postconf(5) for more details including examples.  




TLS SESSION CACHE   Début   Précédent   Suivant   Sommaire   Préc.page.lue   Accueil


lmtp_tls_loglevel (0)
The LMTP-specific version of the smtp_tls_loglevel configuration parameter.
lmtp_tls_session_cache_database (empty)
The LMTP-specific version of the smtp_tls_session_cache_database configuration parameter.
lmtp_tls_session_cache_timeout (3600s)
The LMTP-specific version of the smtp_tls_session_cache_timeout configuration parameter.
smtp_tls_loglevel (0)
Enable additional Postfix SMTP client logging of TLS activity.
smtp_tls_session_cache_database (empty)
Name of the file containing the optional Postfix SMTP client TLS session cache.
smtp_tls_session_cache_timeout (3600s)
The expiration time of Postfix SMTP client TLS session cache information.
smtpd_tls_loglevel (0)
Enable additional Postfix SMTP server logging of TLS activity.
smtpd_tls_session_cache_database (empty)
Name of the file containing the optional Postfix SMTP server TLS session cache.
smtpd_tls_session_cache_timeout (3600s)
The expiration time of Postfix SMTP server TLS session cache information.
 



PSEUDO RANDOM NUMBER GENERATOR   Début   Précédent   Suivant   Sommaire   Préc.page.lue   Accueil


tls_random_source (see 'postconf -d' output)
The external entropy source for the in-memory tlsmgr(8) pseudo random number generator (PRNG) pool.
tls_random_bytes (32)
The number of bytes that tlsmgr(8) reads from $tls_random_source when (re)seeding the in-memory pseudo random number generator (PRNG) pool.
tls_random_exchange_name (see 'postconf -d' output)
Name of the pseudo random number generator (PRNG) state file that is maintained by tlsmgr(8).
tls_random_prng_update_period (3600s)
The time between attempts by tlsmgr(8) to save the state of the pseudo random number generator (PRNG) to the file specified with $tls_random_exchange_name.
tls_random_reseed_period (3600s)
The maximal time between attempts by tlsmgr(8) to re-seed the in-memory pseudo random number generator (PRNG) pool from external sources.
 



MISCELLANEOUS CONTROLS   Début   Précédent   Suivant   Sommaire   Préc.page.lue   Accueil


config_directory (see 'postconf -d' output)
The default location of the Postfix main.cf and master.cf configuration files.
data_directory (see 'postconf -d' output)
The directory with Postfix-writable data files (for example: caches, pseudo-random numbers).
daemon_timeout (18000s)
How much time a Postfix daemon process may take to handle a request before it is terminated by a built-in watchdog timer.
process_id (read-only)
The process ID of a Postfix command or daemon process.
process_name (read-only)
The process name of a Postfix command or daemon process.
syslog_facility (mail)
The syslog facility of Postfix logging.
syslog_name (postfix)
The mail system name that is prepended to the process name in syslog records, so that "smtpd" becomes, for example, "postfix/smtpd".
 



SEE ALSO   Début   Précédent   Suivant   Sommaire   Préc.page.lue   Accueil
smtp(8), Postfix SMTP client
smtpd(8), Postfix SMTP server
postconf(5), configuration parameters
master(5), generic daemon options
master(8), process manager
syslogd(8), system logging
 



README FILES   Début   Précédent   Suivant   Sommaire   Préc.page.lue   Accueil


Use "postconf readme_directory" or
"postconf html_directory" to locate this information.

TLS_README, Postfix TLS configuration and operation
 



LICENSE   Début   Précédent   Suivant   Sommaire   Préc.page.lue   Accueil


The Secure Mailer license must be distributed with this software.
 



AUTHOR(S)   Début   Précédent   Suivant   Sommaire   Préc.page.lue   Accueil
Lutz Jaenicke
BTU Cottbus
Allgemeine Elektrotechnik
Universitaetsplatz 3-4
D-03044 Cottbus, Germany

Adapted by:
Wietse Venema
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA


 



Sommaire   Début   Suivant   Sommaire   Préc.page.lue   Accueil
NAME
SYNOPSIS
DESCRIPTION
SECURITY
DIAGNOSTICS
BUGS
CONFIGURATION PARAMETERS
TLS SESSION CACHE
PSEUDO RANDOM NUMBER GENERATOR
MISCELLANEOUS CONTROLS
SEE ALSO
README FILES
LICENSE
AUTHOR(S)

Table des mots clés   Début   Suivant   Sommaire   Préc.page.lue   Accueil
config_directory (see 'postconf -d' output)MISCELLANEOUS CONTROLS
daemon_timeout (18000s)MISCELLANEOUS CONTROLS
data_directory (see 'postconf -d' output)MISCELLANEOUS CONTROLS
lmtp_tls_loglevel (0)TLS SESSION CACHE
lmtp_tls_session_cache_database (empty)TLS SESSION CACHE
lmtp_tls_session_cache_timeout (3600s)TLS SESSION CACHE
process_id (read-only)MISCELLANEOUS CONTROLS
process_name (read-only)MISCELLANEOUS CONTROLS
smtp_tls_loglevel (0)TLS SESSION CACHE
smtp_tls_session_cache_database (empty)TLS SESSION CACHE
smtp_tls_session_cache_timeout (3600s)TLS SESSION CACHE
smtpd_tls_loglevel (0)TLS SESSION CACHE
smtpd_tls_session_cache_database (empty)TLS SESSION CACHE
smtpd_tls_session_cache_timeout (3600s)TLS SESSION CACHE
syslog_facility (mail)MISCELLANEOUS CONTROLS
syslog_name (postfix)MISCELLANEOUS CONTROLS
tls_random_bytes (32)PSEUDO RANDOM NUMBER GENERATOR
tls_random_exchange_name (see 'postconf -d' output)PSEUDO RANDOM NUMBER GENERATOR
tls_random_prng_update_period (3600s)PSEUDO RANDOM NUMBER GENERATOR
tls_random_reseed_period (3600s)PSEUDO RANDOM NUMBER GENERATOR
tls_random_source (see 'postconf -d' output)PSEUDO RANDOM NUMBER GENERATOR



Ce document a été créé par man2html suivi de man2html.pl, le 17/10/2008 17:54:37, en utilisant les pages de 'man'.
 

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