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-<HTML>
-<HEAD>
- <META NAME="GENERATOR" CONTENT="LinuxDoc-Tools 0.9.69">
- <TITLE>Squid 4.0.0 release notes</TITLE>
-</HEAD>
-<BODY>
-<H1>Squid 4.0.0 release notes</H1>
-
-<H2>Squid Developers</H2>
-<HR>
-<EM>This document contains the release notes for version 4 of Squid.
-Squid is a WWW Cache application developed by the National Laboratory
-for Applied Network Research and members of the Web Caching community.</EM>
-<HR>
-<P>
-<H2><A NAME="toc1">1.</A> <A HREF="#s1">Notice</A></H2>
-
-<UL>
-<LI><A NAME="toc1.1">1.1</A> <A HREF="#ss1.1">Known issues</A>
-<LI><A NAME="toc1.2">1.2</A> <A HREF="#ss1.2">Changes since earlier releases of Squid-4</A>
-</UL>
-<P>
-<H2><A NAME="toc2">2.</A> <A HREF="#s2">Major new features since Squid-3.5</A></H2>
-
-<UL>
-<LI><A NAME="toc2.1">2.1</A> <A HREF="#ss2.1">Configurable helper queue size</A>
-<LI><A NAME="toc2.2">2.2</A> <A HREF="#ss2.2">Helper concurrency channels changes</A>
-<LI><A NAME="toc2.3">2.3</A> <A HREF="#ss2.3">SSLv2 support removal</A>
-<LI><A NAME="toc2.4">2.4</A> <A HREF="#ss2.4">MSNT-multi-domain helper removal</A>
-</UL>
-<P>
-<H2><A NAME="toc3">3.</A> <A HREF="#s3">Changes to squid.conf since Squid-3.5</A></H2>
-
-<UL>
-<LI><A NAME="toc3.1">3.1</A> <A HREF="#ss3.1">New tags</A>
-<LI><A NAME="toc3.2">3.2</A> <A HREF="#ss3.2">Changes to existing tags</A>
-<LI><A NAME="toc3.3">3.3</A> <A HREF="#ss3.3">Removed tags</A>
-</UL>
-<P>
-<H2><A NAME="toc4">4.</A> <A HREF="#s4">Changes to ./configure options since Squid-3.5</A></H2>
-
-<UL>
-<LI><A NAME="toc4.1">4.1</A> <A HREF="#ss4.1">New options</A>
-<LI><A NAME="toc4.2">4.2</A> <A HREF="#ss4.2">Changes to existing options</A>
-<LI><A NAME="toc4.3">4.3</A> <A HREF="#ss4.3">Removed options</A>
-</UL>
-<P>
-<H2><A NAME="toc5">5.</A> <A HREF="#s5">Regressions since Squid-2.7</A></H2>
-
-<UL>
-<LI><A NAME="toc5.1">5.1</A> <A HREF="#ss5.1">Missing squid.conf options available in Squid-2.7</A>
-</UL>
-<P>
-<H2><A NAME="toc6">6.</A> <A HREF="#s6">Copyright</A></H2>
-
-
-<HR>
-<H2><A NAME="s1">1.</A> <A HREF="#toc1">Notice</A></H2>
-
-<P>The Squid Team are pleased to announce the release of Squid-4.0.0 for testing.</P>
-<P>This new release is available for download from
-<A HREF="http://www.squid-cache.org/Versions/v4/">http://www.squid-cache.org/Versions/v4/</A> or the
-<A HREF="http://www.squid-cache.org/Download/http-mirrors.html">mirrors</A>.</P>
-
-<P>While this release is not deemed ready for production use, we believe it is ready for wider testing by the community.</P>
-
-<P>We welcome feedback and bug reports. If you find a bug, please see
-<A HREF="http://wiki.squid-cache.org/SquidFaq/BugReporting">http://wiki.squid-cache.org/SquidFaq/BugReporting</A>
-for how to submit a report with a stack trace.</P>
-
-<H2><A NAME="ss1.1">1.1</A> <A HREF="#toc1.1">Known issues</A>
-</H2>
-
-<P>Although this release is deemed good enough for use in many setups, please note the existence of
-<A HREF="http://bugs.squid-cache.org/buglist.cgi?query_format=advanced&product=Squid&bug_status=UNCONFIRMED&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&version=4">open bugs against Squid-4</A>.</P>
-
-<H2><A NAME="ss1.2">1.2</A> <A HREF="#toc1.2">Changes since earlier releases of Squid-4</A>
-</H2>
-
-<P>The Squid-4 change history can be
-<A HREF="http://www.squid-cache.org/Versions/v4/changesets/">viewed here</A>.</P>
-
-
-<H2><A NAME="s2">2.</A> <A HREF="#toc2">Major new features since Squid-3.5</A></H2>
-
-<P>Squid 4 represents a new feature release above 3.5.</P>
-
-<P>The most important of these new features are:
-<UL>
-<LI>Helper concurrency channels changes</LI>
-<LI>Configurable helper queue size</LI>
-<LI>SSLv2 support removal</LI>
-<LI>MSNT-multi-domain helper removal</LI>
-</UL>
-</P>
-<P>Most user-facing changes are reflected in squid.conf (see below).</P>
-
-
-<H2><A NAME="ss2.1">2.1</A> <A HREF="#toc2.1">Configurable helper queue size</A>
-</H2>
-
-<P>The new queue-size=N option to helpers configuration, allows users
-to configure the maximum number of queued requests to busy helpers.</P>
-
-<H2><A NAME="ss2.2">2.2</A> <A HREF="#toc2.2">Helper concurrency channels changes</A>
-</H2>
-
-<P> helper-mux.pl we have been distributing for the past few years to
-encourage use of concurrency is no longer compatible with Squid. If
-used it will spawn up to 2^64 helpers and DoS the Squid server.</P>
-
-<P> Helpers utilizing arrays to handle fixed amounts of concurrency
-channels MUST be re-written to use queues and capable of handling a
-64-bit int as index or they will be vulnerable to buffer overrun and
-arbitrary memory accesses.</P>
-
-<P> 32-bit helpers need re-writing to handle the concurrency channel ID
-as a 64-bit integer value. If not updated they will cause proxies to
-return unexpected results or timeout once crossing the 32-bit wrap
-boundary. Leading to undefined behaviour in the client HTTP traffic.</P>
-
-<H2><A NAME="ss2.3">2.3</A> <A HREF="#toc2.3">SSLv2 support removal</A>
-</H2>
-
-<P>Details in
-<A HREF="https://tools.ietf.org/html/rfc6176">RFC 6176</A></P>
-
-<P>SSLv2 is not fit for purpose. Squid no longer supports being configured with
-any settings regarding this protocol. That includes settings manually disabling
-its use since it is now forced to disable by default. Also settings enabling
-various client/server workarounds specific to SSLv2 are removed.</P>
-
-
-<H2><A NAME="ss2.4">2.4</A> <A HREF="#toc2.4">MSNT-multi-domain helper removal</A>
-</H2>
-
-<P>The <EM>basic_msnt_multi_domain_auth</EM> helper has been removed. The
-<EM>basic_smb_lm_auth</EM> helper performs the same actions without extra
-Perl and Samba dependencies.</P>
-
-
-<H2><A NAME="s3">3.</A> <A HREF="#toc3">Changes to squid.conf since Squid-3.5</A></H2>
-
-<P>There have been changes to Squid's configuration file since Squid-3.5.</P>
-<P>This section gives a thorough account of those changes in three categories:</P>
-<P>
-<UL>
-<LI>
-<A HREF="#newtags">New tags</A></LI>
-<LI>
-<A HREF="#modifiedtags">Changes to existing tags</A></LI>
-<LI>
-<A HREF="#removedtags">Removed tags</A></LI>
-</UL>
-</P>
-
-
-<H2><A NAME="newtags"></A> <A NAME="ss3.1">3.1</A> <A HREF="#toc3.1">New tags</A>
-</H2>
-
-<P>
-<DL>
-<DT><B>tls_outgoing_options</B><DD>
-<P>New tag to define TLS security context options for outgoing
-connections. For example to HTTPS servers.</P>
-
-<DT><B>url_rewrite_timeout</B><DD>
-<P>Squid times active requests to redirector. This option sets
-the timeout value and the Squid reaction to a timed out
-request.</P>
-
-</DL>
-</P>
-
-<H2><A NAME="modifiedtags"></A> <A NAME="ss3.2">3.2</A> <A HREF="#toc3.2">Changes to existing tags</A>
-</H2>
-
-<P>
-<DL>
-<DT><B>auth_param</B><DD>
-<P>New parameter <EM>queue-size=</EM> to set the maximum number
-of queued requests.</P>
-
-<DT><B>cache_peer</B><DD>
-<P>All <EM>ssloption=</EM> and <EM>sslversion=</EM> values for
-SSLv2 configuration or disabling have been removed.</P>
-<P>Manual squid.conf update may be required on upgrade.</P>
-
-<DT><B>external_acl_type</B><DD>
-<P>New parameter <EM>queue-size=</EM> to set the maximum number
-of queued requests.</P>
-
-<DT><B>http_port</B><DD>
-<P>All <EM>version=</EM> <EM>option=</EM> values for SSLv2
-configuration or disabling have been removed.</P>
-<P>Manual squid.conf update may be required on upgrade.</P>
-
-<DT><B>https_port</B><DD>
-<P>All <EM>version=</EM> <EM>option=</EM> values for SSLv2
-configuration or disabling have been removed.</P>
-<P>Manual squid.conf update may be required on upgrade.</P>
-
-<DT><B>sslcrtd_children</B><DD>
-<P>New parameter <EM>queue-size=</EM> to set the maximum number
-of queued requests.</P>
-
-<DT><B>sslcrtvalidator_children</B><DD>
-<P>New parameter <EM>queue-size=</EM> to set the maximum number
-of queued requests.</P>
-
-<DT><B>sslproxy_options</B><DD>
-<P>All values for SSLv2 configuration or disabling have been removed.</P>
-<P>Manual squid.conf update may be required on upgrade.</P>
-
-<DT><B>sslproxy_version</B><DD>
-<P>Value '2' for SSLv2-only operation is no longer supported.</P>
-
-<DT><B>url_rewrite_children</B><DD>
-<P>New parameter <EM>queue-size=</EM> to set the maximum number
-of queued requests.</P>
-
-</DL>
-</P>
-
-<H2><A NAME="removedtags"></A> <A NAME="ss3.3">3.3</A> <A HREF="#toc3.3">Removed tags</A>
-</H2>
-
-<P>
-<DL>
-<DT><B>cache_peer_domain</B><DD>
-<P>Superceded by <EM>cache_peer_access</EM>. Use dstdomain ACL
-in the access control list to restrict domains requested.</P>
-
-<DT><B>refresh_pattern</B><DD>
-<P>Option <EM>ignore-auth</EM> removed. Its original intent was
-to improve caching. HTTP/1.1 permits caching of authenticated
-messages under conditions which Squid does check for and obey.</P>
-
-<DT><B>sslproxy_cafile</B><DD>
-<P>Replaced by <EM>tls_outgoing_options cafile=</EM>.</P>
-
-<DT><B>sslproxy_capath</B><DD>
-<P>Replaced by <EM>tls_outgoing_options capath=</EM>.</P>
-
-<DT><B>sslproxy_cipher</B><DD>
-<P>Replaced by <EM>tls_outgoing_options cipher=</EM>.</P>
-
-<DT><B>sslproxy_client_certificate</B><DD>
-<P>Replaced by <EM>tls_outgoing_options cert=</EM>.</P>
-
-<DT><B>sslproxy_client_key</B><DD>
-<P>Replaced by <EM>tls_outgoing_options key=</EM>.</P>
-
-<DT><B>sslproxy_flags</B><DD>
-<P>Replaced by <EM>tls_outgoing_options flags=</EM>.</P>
-
-<DT><B>sslproxy_options</B><DD>
-<P>Replaced by <EM>tls_outgoing_options options=</EM>.</P>
-
-<DT><B>sslproxy_version</B><DD>
-<P>Replaced by <EM>tls_outgoing_options version=</EM>.</P>
-
-</DL>
-</P>
-
-
-<H2><A NAME="s4">4.</A> <A HREF="#toc4">Changes to ./configure options since Squid-3.5</A></H2>
-
-<P>There have been some changes to Squid's build configuration since Squid-3.5.</P>
-<P>This section gives an account of those changes in three categories:</P>
-<P>
-<UL>
-<LI>
-<A HREF="#newoptions">New options</A></LI>
-<LI>
-<A HREF="#modifiedoptions">Changes to existing options</A></LI>
-<LI>
-<A HREF="#removedoptions">Removed options</A></LI>
-</UL>
-</P>
-
-
-<H2><A NAME="newoptions"></A> <A NAME="ss4.1">4.1</A> <A HREF="#toc4.1">New options</A>
-</H2>
-
-<P>
-<DL>
-
-</DL>
-</P>
-
-<H2><A NAME="modifiedoptions"></A> <A NAME="ss4.2">4.2</A> <A HREF="#toc4.2">Changes to existing options</A>
-</H2>
-
-<P>
-<DL>
-<DT><B>--enable-auth-basic</B><DD>
-<P>The <EM>MSNT-multi-domain</EM> helper has been removed.</P>
-
-</DL>
-</P>
-<H2><A NAME="removedoptions"></A> <A NAME="ss4.3">4.3</A> <A HREF="#toc4.3">Removed options</A>
-</H2>
-
-<P>
-<DL>
-
-</DL>
-</P>
-
-
-<H2><A NAME="s5">5.</A> <A HREF="#toc5">Regressions since Squid-2.7</A></H2>
-
-<P>Some squid.conf options which were available in Squid-2.7 are not yet available in Squid-4</P>
-
-<P>If you need something to do then porting one of these from Squid-2 to Squid-3 is most welcome.</P>
-
-<H2><A NAME="ss5.1">5.1</A> <A HREF="#toc5.1">Missing squid.conf options available in Squid-2.7</A>
-</H2>
-
-<P>
-<DL>
-<DT><B>broken_vary_encoding</B><DD>
-<P>Not yet ported from 2.6</P>
-
-<DT><B>cache_peer</B><DD>
-<P><EM>monitorinterval=</EM> not yet ported from 2.6</P>
-<P><EM>monitorsize=</EM> not yet ported from 2.6</P>
-<P><EM>monitortimeout=</EM> not yet ported from 2.6</P>
-<P><EM>monitorurl=</EM> not yet ported from 2.6</P>
-
-<DT><B>cache_vary</B><DD>
-<P>Not yet ported from 2.6</P>
-
-<DT><B>error_map</B><DD>
-<P>Not yet ported from 2.6</P>
-
-<DT><B>external_refresh_check</B><DD>
-<P>Not yet ported from 2.7</P>
-
-<DT><B>location_rewrite_access</B><DD>
-<P>Not yet ported from 2.6</P>
-
-<DT><B>location_rewrite_children</B><DD>
-<P>Not yet ported from 2.6</P>
-
-<DT><B>location_rewrite_concurrency</B><DD>
-<P>Not yet ported from 2.6</P>
-
-<DT><B>location_rewrite_program</B><DD>
-<P>Not yet ported from 2.6</P>
-
-<DT><B>refresh_pattern</B><DD>
-<P><EM>stale-while-revalidate=</EM> not yet ported from 2.7</P>
-<P><EM>ignore-stale-while-revalidate=</EM> not yet ported from 2.7</P>
-<P><EM>negative-ttl=</EM> not yet ported from 2.7</P>
-
-<DT><B>refresh_stale_hit</B><DD>
-<P>Not yet ported from 2.7</P>
-
-<DT><B>update_headers</B><DD>
-<P>Not yet ported from 2.7</P>
-
-</DL>
-</P>
-
-<H2><A NAME="s6">6.</A> <A HREF="#toc6">Copyright</A></H2>
-
-<P>Copyright (C) 1996-2015 The Squid Software Foundation and contributors</P>
-<P>Squid software is distributed under GPLv2+ license and includes
-contributions from numerous individuals and organizations.
-Please see the COPYING and CONTRIBUTORS files for details.</P>
-
-</BODY>
-</HTML>
projects / thirdparty / squid.git / commitdiff
