Страницы справочника OS X

Эта страница руководства для  версии 10.9 Mac OS X

Читать страницы руководства

TLSPROXY(8)                                                                                      TLSPROXY(8)



NAME
       tlsproxy - Postfix TLS proxy

SYNOPSIS
       tlsproxy [generic Postfix daemon options]

DESCRIPTION
       The  tlsproxy(8) server implements a server-side TLS proxy. It is used by postscreen(8) to talk SMTP-over-TLS SMTPover-TLS
       over-TLS with remote SMTP clients whose whitelist status has expired, but it  should  also  work  for
       non-SMTP protocols.

       Although  one  tlsproxy(8) process can serve multiple sessions at the same time, it is a good idea to
       allow the number of processes to increase with load, so that the service remains responsive.

PROTOCOL EXAMPLE
       The example below concerns postscreen(8). However, the tlsproxy(8) server is agnostic of the applica-tion application
       tion protocol, and the example is easily adapted to other applications.

       The  postscreen(8)  server sends the remote SMTP client endpoint string, the requested role (server),
       and the requested timeout to tlsproxy(8).  postscreen(8) then receives a "TLS  available"  indication
       from  tlsproxy(8).   If the TLS service is available, postscreen(8) sends the remote SMTP client file
       descriptor to tlsproxy(8), and sends the plaintext 220 greeting to  the  remote  SMTP  client.   This
       triggers  TLS  negotiations  between  the remote SMTP client and tlsproxy(8).  Upon completion of the
       TLS-level handshake, tlsproxy(8) translates between plaintext from/to  postscreen(8)  and  ciphertext
       to/from the remote SMTP client.

SECURITY
       The  tlsproxy(8)  server is moderately security-sensitive.  It talks to untrusted clients on the net-work. network.
       work. The process can be run chrooted at fixed low privilege.

DIAGNOSTICS
       Problems and transactions are logged to syslogd(8).

CONFIGURATION PARAMETERS
       Changes to main.cf are not picked up automatically, as tlsproxy(8) processes may run for a long  time
       depending on mail server load.  Use the command "postfix reload" to speed up a change.

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

STARTTLS SUPPORT CONTROLS
       tlsproxy_tls_CAfile ($smtpd_tls_CAfile)
              A file containing (PEM format) CA certificates of root CAs trusted to sign either remote  SMTP
              client certificates or intermediate CA certificates.

       tlsproxy_tls_CApath ($smtpd_tls_CApath)
              A  directory containing (PEM format) CA certificates of root CAs trusted to sign either remote
              SMTP client certificates or intermediate CA certificates.

       tlsproxy_tls_always_issue_session_ids ($smtpd_tls_always_issue_session_ids)
              Force the Postfix tlsproxy(8) server to issue a TLS session id, even when TLS session  caching
              is turned off.

       tlsproxy_tls_ask_ccert ($smtpd_tls_ask_ccert)
              Ask a remote SMTP client for a client certificate.

       tlsproxy_tls_ccert_verifydepth ($smtpd_tls_ccert_verifydepth)
              The verification depth for remote SMTP client certificates.

       tlsproxy_tls_cert_file ($smtpd_tls_cert_file)
              File with the Postfix tlsproxy(8) server RSA certificate in PEM format.

       tlsproxy_tls_ciphers ($smtpd_tls_ciphers)
              The  minimum  TLS cipher grade that the Postfix tlsproxy(8) server will use with opportunistic
              TLS encryption.

       tlsproxy_tls_dcert_file ($smtpd_tls_dcert_file)
              File with the Postfix tlsproxy(8) server DSA certificate in PEM format.

       tlsproxy_tls_dh1024_param_file ($smtpd_tls_dh1024_param_file)
              File with DH parameters that the Postfix tlsproxy(8) server should use with EDH ciphers.

       tlsproxy_tls_dh512_param_file ($smtpd_tls_dh512_param_file)
              File with DH parameters that the Postfix tlsproxy(8) server should use with EDH ciphers.

       tlsproxy_tls_dkey_file ($smtpd_tls_dkey_file)
              File with the Postfix tlsproxy(8) server DSA private key in PEM format.

       tlsproxy_tls_eccert_file ($smtpd_tls_eccert_file)
              File with the Postfix tlsproxy(8) server ECDSA certificate in PEM format.

       tlsproxy_tls_eckey_file ($smtpd_tls_eckey_file)
              File with the Postfix tlsproxy(8) server ECDSA private key in PEM format.

       tlsproxy_tls_eecdh_grade ($smtpd_tls_eecdh_grade)
              The Postfix tlsproxy(8) server security  grade  for  ephemeral  elliptic-curve  Diffie-Hellman
              (EECDH) key exchange.

       tlsproxy_tls_exclude_ciphers ($smtpd_tls_exclude_ciphers)
              List  of ciphers or cipher types to exclude from the tlsproxy(8) server cipher list at all TLS
              security levels.

       tlsproxy_tls_fingerprint_digest ($smtpd_tls_fingerprint_digest)
              The message digest algorithm to construct remote SMTP client-certificate fingerprints.

       tlsproxy_tls_key_file ($smtpd_tls_key_file)
              File with the Postfix tlsproxy(8) server RSA private key in PEM format.

       tlsproxy_tls_loglevel ($smtpd_tls_loglevel)
              Enable additional Postfix tlsproxy(8) server logging of TLS activity.

       tlsproxy_tls_mandatory_ciphers ($smtpd_tls_mandatory_ciphers)
              The minimum TLS cipher grade that the Postfix tlsproxy(8) server will use with  mandatory  TLS
              encryption.

       tlsproxy_tls_mandatory_exclude_ciphers ($smtpd_tls_mandatory_exclude_ciphers)
              Additional  list of ciphers or cipher types to exclude from the tlsproxy(8) server cipher list
              at mandatory TLS security levels.

       tlsproxy_tls_mandatory_protocols ($smtpd_tls_mandatory_protocols)
              The SSL/TLS protocols accepted by the Postfix tlsproxy(8) server with  mandatory  TLS  encryp-tion. encryption.
              tion.

       tlsproxy_tls_protocols ($smtpd_tls_protocols)
              List  of TLS protocols that the Postfix tlsproxy(8) server will exclude or include with oppor-tunistic opportunistic
              tunistic TLS encryption.

       tlsproxy_tls_req_ccert ($smtpd_tls_req_ccert)
              With mandatory TLS encryption, require a trusted remote SMTP client certificate  in  order  to
              allow TLS connections to proceed.

       tlsproxy_tls_security_level ($smtpd_tls_security_level)
              The  SMTP  TLS  security  level  for the Postfix tlsproxy(8) server; when a non-empty value is
              specified, this overrides the obsolete parameters smtpd_use_tls and smtpd_enforce_tls.

       tlsproxy_tls_session_cache_timeout ($smtpd_tls_session_cache_timeout)
              The expiration time of Postfix tlsproxy(8) server TLS session cache information.

OBSOLETE STARTTLS SUPPORT CONTROLS
       These parameters are supported for compatibility with smtpd(8) legacy parameters.

       tlsproxy_use_tls ($smtpd_use_tls)
              Opportunistic TLS: announce STARTTLS support to remote SMTP clients, but do not  require  that
              clients use TLS encryption.

       tlsproxy_enforce_tls ($smtpd_enforce_tls)
              Mandatory  TLS: announce STARTTLS support to remote SMTP clients, and require that clients use
              TLS encryption.

RESOURCE CONTROLS
       tlsproxy_watchdog_timeout (10s)
              How much time a tlsproxy(8) process may take to process local or remote I/O before it is  ter-minated terminated
              minated by a built-in watchdog timer.

MISCELLANEOUS CONTROLS
       config_directory (see 'postconf -d' output)
              The default location of the Postfix main.cf and master.cf configuration files.

       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 (see 'postconf -d' output)
              The  mail system name that is prepended to the process name in syslog records, so that "smtpd"
              becomes, for example, "postfix/smtpd".

SEE ALSO
       postscreen(8), Postfix zombie blocker
       smtpd(8), Postfix SMTP server
       postconf(5), configuration parameters
       syslogd(5), system logging

LICENSE
       The Secure Mailer license must be distributed with this software.

HISTORY
       This service was introduced with Postfix version 2.8.

AUTHOR(S)
       Wietse Venema
       IBM T.J. Watson Research
       P.O. Box 704
       Yorktown Heights, NY 10598, USA



                                                                                                 TLSPROXY(8)