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406 lines
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HTML
406 lines
27 KiB
HTML
<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN"
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"http://www.w3.org/TR/html4/loose.dtd">
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<html> <head>
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<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
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<title> Postfix manual - tlsproxy(8) </title>
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</head> <body> <pre>
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TLSPROXY(8) TLSPROXY(8)
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<b>NAME</b>
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tlsproxy - Postfix TLS proxy
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<b>SYNOPSIS</b>
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<b>tlsproxy</b> [generic Postfix daemon options]
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<b>DESCRIPTION</b>
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The <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server implements a two-way TLS proxy. It is used by
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the <a href="postscreen.8.html"><b>postscreen</b>(8)</a> server to talk SMTP-over-TLS with remote SMTP clients
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that are not whitelisted (including clients whose whitelist status has
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expired), and by the <a href="smtp.8.html"><b>smtp</b>(8)</a> client to support TLS connection reuse,
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but it should also work for non-SMTP protocols.
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Although one <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> process can serve multiple sessions at the
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same time, it is a good idea to allow the number of processes to
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increase with load, so that the service remains responsive.
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<b>PROTOCOL EXAMPLE</b>
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The example below concerns <a href="postscreen.8.html"><b>postscreen</b>(8)</a>. However, the <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a>
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server is agnostic of the application protocol, and the example is eas-
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ily adapted to other applications.
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After receiving a valid remote SMTP client STARTTLS command, the
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<a href="postscreen.8.html"><b>postscreen</b>(8)</a> server sends the remote SMTP client endpoint string, the
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requested role (server), and the requested timeout to <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a>.
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<a href="postscreen.8.html"><b>postscreen</b>(8)</a> then receives a "TLS available" indication from
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<a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a>. If the TLS service is available, <a href="postscreen.8.html"><b>postscreen</b>(8)</a> sends the
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remote SMTP client file descriptor to <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a>, and sends the plain-
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text 220 greeting to the remote SMTP client. This triggers TLS negoti-
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ations between the remote SMTP client and <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a>. Upon completion
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of the TLS-level handshake, <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> translates between plaintext
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from/to <a href="postscreen.8.html"><b>postscreen</b>(8)</a> and ciphertext to/from the remote SMTP client.
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<b>SECURITY</b>
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The <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server is moderately security-sensitive. It talks to
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untrusted clients on the network. The process can be run chrooted at
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fixed low privilege.
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<b>DIAGNOSTICS</b>
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Problems and transactions are logged to <b>syslogd</b>(8) or <a href="postlogd.8.html"><b>postlogd</b>(8)</a>.
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<b>CONFIGURATION PARAMETERS</b>
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Changes to <a href="postconf.5.html"><b>main.cf</b></a> are not picked up automatically, as <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> pro-
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cesses may run for a long time depending on mail server load. Use the
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command "<b>postfix reload</b>" to speed up a change.
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The text below provides only a parameter summary. See <a href="postconf.5.html"><b>postconf</b>(5)</a> for
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more details including examples.
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<b>STARTTLS GLOBAL CONTROLS</b>
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The following settings are global and therefore cannot be overruled by
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information specified in a <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client request.
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<b><a href="postconf.5.html#tls_append_default_CA">tls_append_default_CA</a> (no)</b>
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Append the system-supplied default Certification Authority cer-
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tificates to the ones specified with *_tls_CApath or
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*_tls_CAfile.
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<b><a href="postconf.5.html#tls_daemon_random_bytes">tls_daemon_random_bytes</a> (32)</b>
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The number of pseudo-random bytes that an <a href="smtp.8.html"><b>smtp</b>(8)</a> or <a href="smtpd.8.html"><b>smtpd</b>(8)</a>
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process requests from the <a href="tlsmgr.8.html"><b>tlsmgr</b>(8)</a> server in order to seed its
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internal pseudo random number generator (PRNG).
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<b><a href="postconf.5.html#tls_high_cipherlist">tls_high_cipherlist</a> (see 'postconf -d' output)</b>
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The OpenSSL cipherlist for "high" grade ciphers.
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<b><a href="postconf.5.html#tls_medium_cipherlist">tls_medium_cipherlist</a> (see 'postconf -d' output)</b>
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The OpenSSL cipherlist for "medium" or higher grade ciphers.
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<b><a href="postconf.5.html#tls_low_cipherlist">tls_low_cipherlist</a> (see 'postconf -d' output)</b>
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The OpenSSL cipherlist for "low" or higher grade ciphers.
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<b><a href="postconf.5.html#tls_export_cipherlist">tls_export_cipherlist</a> (see 'postconf -d' output)</b>
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The OpenSSL cipherlist for "export" or higher grade ciphers.
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<b><a href="postconf.5.html#tls_null_cipherlist">tls_null_cipherlist</a> (eNULL:!aNULL)</b>
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The OpenSSL cipherlist for "NULL" grade ciphers that provide
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authentication without encryption.
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<b><a href="postconf.5.html#tls_eecdh_strong_curve">tls_eecdh_strong_curve</a> (prime256v1)</b>
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The elliptic curve used by the Postfix SMTP server for sensibly
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strong ephemeral ECDH key exchange.
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<b><a href="postconf.5.html#tls_eecdh_ultra_curve">tls_eecdh_ultra_curve</a> (secp384r1)</b>
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The elliptic curve used by the Postfix SMTP server for maximally
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strong ephemeral ECDH key exchange.
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<b><a href="postconf.5.html#tls_disable_workarounds">tls_disable_workarounds</a> (see 'postconf -d' output)</b>
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List or bit-mask of OpenSSL bug work-arounds to disable.
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<b><a href="postconf.5.html#tls_preempt_cipherlist">tls_preempt_cipherlist</a> (no)</b>
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With SSLv3 and later, use the Postfix SMTP server's cipher pref-
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erence order instead of the remote client's cipher preference
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order.
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Available in Postfix version 2.9 and later:
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<b><a href="postconf.5.html#tls_legacy_public_key_fingerprint">tls_legacy_public_key_fingerprints</a> (no)</b>
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A temporary migration aid for sites that use certificate <i>pub-</i>
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<i>lic-key</i> fingerprints with Postfix 2.9.0..2.9.5, which use an
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incorrect algorithm.
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Available in Postfix version 2.11-3.1:
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<b><a href="postconf.5.html#tls_dane_digest_agility">tls_dane_digest_agility</a> (on)</b>
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Configure <a href="http://tools.ietf.org/html/rfc7671">RFC7671</a> DANE TLSA digest algorithm agility.
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<b><a href="postconf.5.html#tls_dane_trust_anchor_digest_enable">tls_dane_trust_anchor_digest_enable</a> (yes)</b>
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Enable support for <a href="http://tools.ietf.org/html/rfc6698">RFC 6698</a> (DANE TLSA) DNS records that contain
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digests of trust-anchors with certificate usage "2".
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Available in Postfix version 2.11 and later:
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<b><a href="postconf.5.html#tlsmgr_service_name">tlsmgr_service_name</a> (tlsmgr)</b>
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The name of the <a href="tlsmgr.8.html"><b>tlsmgr</b>(8)</a> service entry in <a href="master.5.html">master.cf</a>.
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Available in Postfix version 3.0 and later:
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<b><a href="postconf.5.html#tls_session_ticket_cipher">tls_session_ticket_cipher</a> (Postfix</b> ><b>= 3.0: aes-256-cbc, Postfix</b> < <b>3.0:</b>
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<b>aes-128-cbc)</b>
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Algorithm used to encrypt <a href="http://tools.ietf.org/html/rfc5077">RFC5077</a> TLS session tickets.
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<b><a href="postconf.5.html#openssl_path">openssl_path</a> (openssl)</b>
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The location of the OpenSSL command line program <b>openssl</b>(1).
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Available in Postfix version 3.2 and later:
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<b><a href="postconf.5.html#tls_eecdh_auto_curves">tls_eecdh_auto_curves</a> (see 'postconf -d' output)</b>
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The prioritized list of elliptic curves supported by the Postfix
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SMTP client and server.
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Available in Postfix version 3.4 and later:
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<b><a href="postconf.5.html#tls_server_sni_maps">tls_server_sni_maps</a> (empty)</b>
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Optional lookup tables that map names received from remote SMTP
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clients via the TLS Server Name Indication (SNI) extension to
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the appropriate keys and certificate chains.
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<b>STARTTLS SERVER CONTROLS</b>
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These settings are clones of Postfix SMTP server settings. They allow
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<a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> to load the same certificate and private key information as
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the Postfix SMTP server, before dropping privileges, so that the key
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files can be kept read-only for root. These settings can currently not
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be overruled by information in a <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client request, but that
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limitation may be removed in a future version.
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<b><a href="postconf.5.html#tlsproxy_tls_CAfile">tlsproxy_tls_CAfile</a> ($<a href="postconf.5.html#smtpd_tls_CAfile">smtpd_tls_CAfile</a>)</b>
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A file containing (PEM format) CA certificates of root CAs
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trusted to sign either remote SMTP client certificates or inter-
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mediate CA certificates.
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<b><a href="postconf.5.html#tlsproxy_tls_CApath">tlsproxy_tls_CApath</a> ($<a href="postconf.5.html#smtpd_tls_CApath">smtpd_tls_CApath</a>)</b>
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A directory containing (PEM format) CA certificates of root CAs
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trusted to sign either remote SMTP client certificates or inter-
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mediate CA certificates.
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<b><a href="postconf.5.html#tlsproxy_tls_always_issue_session_ids">tlsproxy_tls_always_issue_session_ids</a> ($<a href="postconf.5.html#smtpd_tls_always_issue_session_ids">smtpd_tls_always_issue_ses</a>-</b>
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<b><a href="postconf.5.html#smtpd_tls_always_issue_session_ids">sion_ids</a>)</b>
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Force the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server to issue a TLS session id,
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even when TLS session caching is turned off.
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<b><a href="postconf.5.html#tlsproxy_tls_ask_ccert">tlsproxy_tls_ask_ccert</a> ($<a href="postconf.5.html#smtpd_tls_ask_ccert">smtpd_tls_ask_ccert</a>)</b>
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Ask a remote SMTP client for a client certificate.
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<b><a href="postconf.5.html#tlsproxy_tls_ccert_verifydepth">tlsproxy_tls_ccert_verifydepth</a> ($<a href="postconf.5.html#smtpd_tls_ccert_verifydepth">smtpd_tls_ccert_verifydepth</a>)</b>
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The verification depth for remote SMTP client certificates.
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<b><a href="postconf.5.html#tlsproxy_tls_cert_file">tlsproxy_tls_cert_file</a> ($<a href="postconf.5.html#smtpd_tls_cert_file">smtpd_tls_cert_file</a>)</b>
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File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server RSA certificate in PEM
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format.
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<b><a href="postconf.5.html#tlsproxy_tls_ciphers">tlsproxy_tls_ciphers</a> ($<a href="postconf.5.html#smtpd_tls_ciphers">smtpd_tls_ciphers</a>)</b>
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The minimum TLS cipher grade that the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server
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will use with opportunistic TLS encryption.
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<b><a href="postconf.5.html#tlsproxy_tls_dcert_file">tlsproxy_tls_dcert_file</a> ($<a href="postconf.5.html#smtpd_tls_dcert_file">smtpd_tls_dcert_file</a>)</b>
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File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server DSA certificate in PEM
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format.
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<b><a href="postconf.5.html#tlsproxy_tls_dh1024_param_file">tlsproxy_tls_dh1024_param_file</a> ($<a href="postconf.5.html#smtpd_tls_dh1024_param_file">smtpd_tls_dh1024_param_file</a>)</b>
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File with DH parameters that the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server
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should use with non-export EDH ciphers.
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<b><a href="postconf.5.html#tlsproxy_tls_dh512_param_file">tlsproxy_tls_dh512_param_file</a> ($<a href="postconf.5.html#smtpd_tls_dh512_param_file">smtpd_tls_dh512_param_file</a>)</b>
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File with DH parameters that the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server
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should use with export-grade EDH ciphers.
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<b><a href="postconf.5.html#tlsproxy_tls_dkey_file">tlsproxy_tls_dkey_file</a> ($<a href="postconf.5.html#smtpd_tls_dkey_file">smtpd_tls_dkey_file</a>)</b>
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File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server DSA private key in PEM
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format.
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<b><a href="postconf.5.html#tlsproxy_tls_eccert_file">tlsproxy_tls_eccert_file</a> ($<a href="postconf.5.html#smtpd_tls_eccert_file">smtpd_tls_eccert_file</a>)</b>
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File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server ECDSA certificate in
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PEM format.
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<b><a href="postconf.5.html#tlsproxy_tls_eckey_file">tlsproxy_tls_eckey_file</a> ($<a href="postconf.5.html#smtpd_tls_eckey_file">smtpd_tls_eckey_file</a>)</b>
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File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server ECDSA private key in
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PEM format.
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<b><a href="postconf.5.html#tlsproxy_tls_eecdh_grade">tlsproxy_tls_eecdh_grade</a> ($<a href="postconf.5.html#smtpd_tls_eecdh_grade">smtpd_tls_eecdh_grade</a>)</b>
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The Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server security grade for ephemeral
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elliptic-curve Diffie-Hellman (EECDH) key exchange.
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<b><a href="postconf.5.html#tlsproxy_tls_exclude_ciphers">tlsproxy_tls_exclude_ciphers</a> ($<a href="postconf.5.html#smtpd_tls_exclude_ciphers">smtpd_tls_exclude_ciphers</a>)</b>
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List of ciphers or cipher types to exclude from the <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a>
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server cipher list at all TLS security levels.
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<b><a href="postconf.5.html#tlsproxy_tls_fingerprint_digest">tlsproxy_tls_fingerprint_digest</a> ($<a href="postconf.5.html#smtpd_tls_fingerprint_digest">smtpd_tls_fingerprint_digest</a>)</b>
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The message digest algorithm to construct remote SMTP
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client-certificate fingerprints.
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<b><a href="postconf.5.html#tlsproxy_tls_key_file">tlsproxy_tls_key_file</a> ($<a href="postconf.5.html#smtpd_tls_key_file">smtpd_tls_key_file</a>)</b>
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File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server RSA private key in PEM
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format.
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<b><a href="postconf.5.html#tlsproxy_tls_loglevel">tlsproxy_tls_loglevel</a> ($<a href="postconf.5.html#smtpd_tls_loglevel">smtpd_tls_loglevel</a>)</b>
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Enable additional Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server logging of TLS
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activity.
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<b><a href="postconf.5.html#tlsproxy_tls_mandatory_ciphers">tlsproxy_tls_mandatory_ciphers</a> ($<a href="postconf.5.html#smtpd_tls_mandatory_ciphers">smtpd_tls_mandatory_ciphers</a>)</b>
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The minimum TLS cipher grade that the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server
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will use with mandatory TLS encryption.
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<b><a href="postconf.5.html#tlsproxy_tls_mandatory_exclude_ciphers">tlsproxy_tls_mandatory_exclude_ciphers</a> ($<a href="postconf.5.html#smtpd_tls_mandatory_exclude_ciphers">smtpd_tls_manda</a>-</b>
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<b><a href="postconf.5.html#smtpd_tls_mandatory_exclude_ciphers">tory_exclude_ciphers</a>)</b>
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Additional list of ciphers or cipher types to exclude from the
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<a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server cipher list at mandatory TLS security levels.
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<b><a href="postconf.5.html#tlsproxy_tls_mandatory_protocols">tlsproxy_tls_mandatory_protocols</a> ($<a href="postconf.5.html#smtpd_tls_mandatory_protocols">smtpd_tls_mandatory_protocols</a>)</b>
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The SSL/TLS protocols accepted by the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server
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with mandatory TLS encryption.
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<b><a href="postconf.5.html#tlsproxy_tls_protocols">tlsproxy_tls_protocols</a> ($<a href="postconf.5.html#smtpd_tls_protocols">smtpd_tls_protocols</a>)</b>
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List of TLS protocols that the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server will
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exclude or include with opportunistic TLS encryption.
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<b><a href="postconf.5.html#tlsproxy_tls_req_ccert">tlsproxy_tls_req_ccert</a> ($<a href="postconf.5.html#smtpd_tls_req_ccert">smtpd_tls_req_ccert</a>)</b>
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With mandatory TLS encryption, require a trusted remote SMTP
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client certificate in order to allow TLS connections to proceed.
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<b><a href="postconf.5.html#tlsproxy_tls_security_level">tlsproxy_tls_security_level</a> ($<a href="postconf.5.html#smtpd_tls_security_level">smtpd_tls_security_level</a>)</b>
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The SMTP TLS security level for the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server;
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when a non-empty value is specified, this overrides the obsolete
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parameters <a href="postconf.5.html#smtpd_use_tls">smtpd_use_tls</a> and <a href="postconf.5.html#smtpd_enforce_tls">smtpd_enforce_tls</a>.
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<b><a href="postconf.5.html#tlsproxy_tls_chain_files">tlsproxy_tls_chain_files</a> ($<a href="postconf.5.html#smtpd_tls_chain_files">smtpd_tls_chain_files</a>)</b>
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Files with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> server keys and certificate
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chains in PEM format.
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<b>STARTTLS CLIENT CONTROLS</b>
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These settings are clones of Postfix SMTP client settings. They allow
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<a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> to load the same certificate and private key information as
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the Postfix SMTP client, before dropping privileges, so that the key
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files can be kept read-only for root. Some settings may be overruled by
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information in a <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client request.
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Available in Postfix version 3.4 and later:
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<b><a href="postconf.5.html#tlsproxy_client_CAfile">tlsproxy_client_CAfile</a> ($<a href="postconf.5.html#smtp_tls_CAfile">smtp_tls_CAfile</a>)</b>
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A file containing CA certificates of root CAs trusted to sign
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either remote TLS server certificates or intermediate CA cer-
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tificates.
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<b><a href="postconf.5.html#tlsproxy_client_CApath">tlsproxy_client_CApath</a> ($<a href="postconf.5.html#smtp_tls_CApath">smtp_tls_CApath</a>)</b>
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Directory with PEM format Certification Authority certificates
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that the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client uses to verify a remote TLS
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server certificate.
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<b><a href="postconf.5.html#tlsproxy_client_chain_files">tlsproxy_client_chain_files</a> ($<a href="postconf.5.html#smtp_tls_chain_files">smtp_tls_chain_files</a>)</b>
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Files with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client keys and certificate
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chains in PEM format.
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<b><a href="postconf.5.html#tlsproxy_client_cert_file">tlsproxy_client_cert_file</a> ($<a href="postconf.5.html#smtp_tls_cert_file">smtp_tls_cert_file</a>)</b>
|
|
File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client RSA certificate in PEM
|
|
format.
|
|
|
|
<b><a href="postconf.5.html#tlsproxy_client_key_file">tlsproxy_client_key_file</a> ($<a href="postconf.5.html#smtp_tls_key_file">smtp_tls_key_file</a>)</b>
|
|
File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client RSA private key in PEM
|
|
format.
|
|
|
|
<b><a href="postconf.5.html#tlsproxy_client_dcert_file">tlsproxy_client_dcert_file</a> ($<a href="postconf.5.html#smtp_tls_dcert_file">smtp_tls_dcert_file</a>)</b>
|
|
File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client DSA certificate in PEM
|
|
format.
|
|
|
|
<b><a href="postconf.5.html#tlsproxy_client_dkey_file">tlsproxy_client_dkey_file</a> ($<a href="postconf.5.html#smtp_tls_dkey_file">smtp_tls_dkey_file</a>)</b>
|
|
File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client DSA private key in PEM
|
|
format.
|
|
|
|
<b><a href="postconf.5.html#tlsproxy_client_eccert_file">tlsproxy_client_eccert_file</a> ($<a href="postconf.5.html#smtp_tls_eccert_file">smtp_tls_eccert_file</a>)</b>
|
|
File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client ECDSA certificate in
|
|
PEM format.
|
|
|
|
<b><a href="postconf.5.html#tlsproxy_client_eckey_file">tlsproxy_client_eckey_file</a> ($<a href="postconf.5.html#smtp_tls_eckey_file">smtp_tls_eckey_file</a>)</b>
|
|
File with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client ECDSA private key in
|
|
PEM format.
|
|
|
|
<b><a href="postconf.5.html#tlsproxy_client_fingerprint_digest">tlsproxy_client_fingerprint_digest</a> ($<a href="postconf.5.html#smtp_tls_fingerprint_digest">smtp_tls_fingerprint_digest</a>)</b>
|
|
The message digest algorithm used to construct remote TLS server
|
|
certificate fingerprints.
|
|
|
|
<b><a href="postconf.5.html#tlsproxy_client_loglevel">tlsproxy_client_loglevel</a> ($<a href="postconf.5.html#smtp_tls_loglevel">smtp_tls_loglevel</a>)</b>
|
|
Enable additional Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client logging of TLS
|
|
activity.
|
|
|
|
<b><a href="postconf.5.html#tlsproxy_client_loglevel_parameter">tlsproxy_client_loglevel_parameter</a> (<a href="postconf.5.html#smtp_tls_loglevel">smtp_tls_loglevel</a>)</b>
|
|
The name of the parameter that provides the
|
|
<a href="postconf.5.html#tlsproxy_client_loglevel">tlsproxy_client_loglevel</a> value.
|
|
|
|
<b><a href="postconf.5.html#tlsproxy_client_scert_verifydepth">tlsproxy_client_scert_verifydepth</a> ($<a href="postconf.5.html#smtp_tls_scert_verifydepth">smtp_tls_scert_verifydepth</a>)</b>
|
|
The verification depth for remote TLS server certificates.
|
|
|
|
<b><a href="postconf.5.html#tlsproxy_client_security_level">tlsproxy_client_security_level</a> ($<a href="postconf.5.html#smtp_tls_security_level">smtp_tls_security_level</a>)</b>
|
|
The default TLS security level for the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a>
|
|
client.
|
|
|
|
<b><a href="postconf.5.html#tlsproxy_client_policy_maps">tlsproxy_client_policy_maps</a> ($<a href="postconf.5.html#smtp_tls_policy_maps">smtp_tls_policy_maps</a>)</b>
|
|
Optional lookup tables with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client TLS
|
|
security policy by next-hop destination.
|
|
|
|
<b><a href="postconf.5.html#tlsproxy_client_use_tls">tlsproxy_client_use_tls</a> ($<a href="postconf.5.html#smtp_use_tls">smtp_use_tls</a>)</b>
|
|
Opportunistic mode: use TLS when a remote server announces TLS
|
|
support.
|
|
|
|
<b><a href="postconf.5.html#tlsproxy_client_enforce_tls">tlsproxy_client_enforce_tls</a> ($<a href="postconf.5.html#smtp_enforce_tls">smtp_enforce_tls</a>)</b>
|
|
Enforcement mode: require that SMTP servers use TLS encryption.
|
|
|
|
<b><a href="postconf.5.html#tlsproxy_client_per_site">tlsproxy_client_per_site</a> ($<a href="postconf.5.html#smtp_tls_per_site">smtp_tls_per_site</a>)</b>
|
|
Optional lookup tables with the Postfix <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> client TLS
|
|
usage policy by next-hop destination and by remote TLS server
|
|
hostname.
|
|
|
|
<b>OBSOLETE STARTTLS SUPPORT CONTROLS</b>
|
|
These parameters are supported for compatibility with <a href="smtpd.8.html"><b>smtpd</b>(8)</a> legacy
|
|
parameters.
|
|
|
|
<b><a href="postconf.5.html#tlsproxy_use_tls">tlsproxy_use_tls</a> ($<a href="postconf.5.html#smtpd_use_tls">smtpd_use_tls</a>)</b>
|
|
Opportunistic TLS: announce STARTTLS support to remote SMTP
|
|
clients, but do not require that clients use TLS encryption.
|
|
|
|
<b><a href="postconf.5.html#tlsproxy_enforce_tls">tlsproxy_enforce_tls</a> ($<a href="postconf.5.html#smtpd_enforce_tls">smtpd_enforce_tls</a>)</b>
|
|
Mandatory TLS: announce STARTTLS support to remote SMTP clients,
|
|
and require that clients use TLS encryption.
|
|
|
|
<b>RESOURCE CONTROLS</b>
|
|
<b><a href="postconf.5.html#tlsproxy_watchdog_timeout">tlsproxy_watchdog_timeout</a> (10s)</b>
|
|
How much time a <a href="tlsproxy.8.html"><b>tlsproxy</b>(8)</a> process may take to process local or
|
|
remote I/O before it is terminated by a built-in watchdog timer.
|
|
|
|
<b>MISCELLANEOUS CONTROLS</b>
|
|
<b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b>
|
|
The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con-
|
|
figuration files.
|
|
|
|
<b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b>
|
|
The process ID of a Postfix command or daemon process.
|
|
|
|
<b><a href="postconf.5.html#process_name">process_name</a> (read-only)</b>
|
|
The process name of a Postfix command or daemon process.
|
|
|
|
<b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b>
|
|
The syslog facility of Postfix logging.
|
|
|
|
<b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b>
|
|
A prefix that is prepended to the process name in syslog
|
|
records, so that, for example, "smtpd" becomes "prefix/smtpd".
|
|
|
|
Available in Postfix 3.3 and later:
|
|
|
|
<b><a href="postconf.5.html#service_name">service_name</a> (read-only)</b>
|
|
The <a href="master.5.html">master.cf</a> service name of a Postfix daemon process.
|
|
|
|
<b>SEE ALSO</b>
|
|
<a href="postscreen.8.html">postscreen(8)</a>, Postfix zombie blocker
|
|
<a href="smtpd.8.html">smtpd(8)</a>, Postfix SMTP server
|
|
<a href="postconf.5.html">postconf(5)</a>, configuration parameters
|
|
<a href="postlogd.8.html">postlogd(8)</a>, Postfix logging
|
|
syslogd(8), system logging
|
|
|
|
<b>LICENSE</b>
|
|
The Secure Mailer license must be distributed with this software.
|
|
|
|
<b>HISTORY</b>
|
|
This service was introduced with Postfix version 2.8.
|
|
|
|
<b>AUTHOR(S)</b>
|
|
Wietse Venema
|
|
IBM T.J. Watson Research
|
|
P.O. Box 704
|
|
Yorktown Heights, NY 10598, USA
|
|
|
|
Wietse Venema
|
|
Google, Inc.
|
|
111 8th Avenue
|
|
New York, NY 10011, USA
|
|
|
|
TLSPROXY(8)
|
|
</pre> </body> </html>
|