SOCKS: move from Experimental to mainline

[users/heiko/exim.git] / doc / doc-docbook / spec.xfpt

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 289ba65eebef76e2a81bcd8f3cf6e1ab7f269190..677b4ef508bdd05d8a54aecec49c927e357d08e2 100644 (file)
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -7314,6 +7314,8 @@ The value of the DEREFERENCE parameter must be one of the words &"never"&,
 must be &"follow"& (the default) or &"nofollow"&. The latter stops the LDAP
 library from trying to follow referrals issued by the LDAP server.
 
+.cindex LDAP timeout
+.cindex timeout "LDAP lookup"
 The name CONNECT is an obsolete name for NETTIME, retained for
 backwards compatibility. This timeout (specified as a number of seconds) is
 enforced from the client end for operations that can be carried out over a
@@ -7663,6 +7665,8 @@ domainlist relay_to_domains = sqlite;/some/thing/sqlitedb \
 The only character affected by the &%quote_sqlite%& operator is a single
 quote, which it doubles.
 
+.cindex timeout SQLite
+.cindex sqlite "lookup timeout"
 The SQLite library handles multiple simultaneous accesses to the database
 internally. Multiple readers are permitted, but only one process can
 update at once. Attempts to access the database while it is being updated
@@ -23725,6 +23729,14 @@ Alternatively, if the value of &%size_addition%& is set negative, it disables
 the use of the SIZE option altogether.
 
 
+.new
+.option socks_proxy smtp string&!! unset
+.cindex proxy SOCKS
+This option enables use of SOCKS proxies for connections made by the
+transport.  For details see &<<SECTproxySOCKS>>&.
+.wen
+
+
 .option tls_certificate smtp string&!! unset
 .cindex "TLS" "client certificate, location of"
 .cindex "certificate" "client, location of"
@@ -38004,6 +38016,83 @@ for more information of what they mean.
 . ////////////////////////////////////////////////////////////////////////////
 . ////////////////////////////////////////////////////////////////////////////
 
+.chapter "Proxies" "CHAPproxies" &&&
+         "Proxy support"
+.cindex "proxy support"
+.cindex "proxy" "access via"
+
+.new
+A proxy is an intermediate system through which communication is passed.
+Proxies may provide a security, availability or load-distribution function.
+
+.section "Outbound proxies" SECTproxySOCKS
+.cindex proxy outbound
+.cindex proxy "client side"
+.cindex proxy SOCKS
+.cindex SOCKS proxy
+Exim has support for sending outbound SMTP via a proxy
+using a protocol called SOCKS5 (defined by RFC1928).
+The support can be removed by defining DISABLE_SOCKS=yes in Local/Makefile.
+
+Use of a proxy is enabled by setting the &%socks_proxy%& on an smtp transport.
+The option value is expanded and should then be a list
+(colon-separated by default) of proxy specifiers.
+Each proxy specifier is a list
+(space-separated by default) where the initial element
+is an IP address and any subsequent elements are options.
+
+Options are a string <name>=<value>. 
+The list of options is in the following table:
+.display
+&`auth   `& authentication method
+&`name   `& authentication username
+&`pass   `& authentication password
+&`port   `& tcp port
+&`tmo    `& connection timeout
+&`pri    `& priority
+&`weight `& selection bias
+.endd
+
+More details on each of these options follows:
+
+.ilist
+.cindex authentication "to proxy"
+.cindex proxy authentication
+&%auth%&: Either &"none"& (default) or &"name"&.
+Using &"name"& selects username/password authentication per RFC 1929
+for access to the proxy.
+Default is &"none"&.
+.next
+&%name%&: sets the username for the &"name"& authentication method.
+Default is empty.
+.next
+&%pass%&: sets the password for the &"name"& authentication method.
+Default is empty.
+.next
+&%port%&: the TCP port number to use for the connection to the proxy.
+Default is 1080.
+.next
+&%tmo%&: sets a connection timeout in seconds for this proxy.
+Default is 5.
+.next
+&%pri%&: specifies a priority for the proxy within the list,
+higher values being tried first.
+The default priority is 1.
+.next
+&%weight%&: specifies a selection bias.
+Within a priority set servers are queried in a random fashion,
+weighted by this value.
+The default value for selection bias is 1.
+.endlist
+
+Proxies from the list are tried according to their priority
+and weight settings until one responds.  The timeout for the
+overall connection applies to the set of proxied attempts.
+.wen
+
+. ////////////////////////////////////////////////////////////////////////////
+. ////////////////////////////////////////////////////////////////////////////
+
 .chapter "Adding new drivers or lookup types" "CHID13" &&&
          "Adding drivers or lookups"
 .cindex "adding drivers"