></DL
></DIV
></DIV
+></DIV
+><DIV
+CLASS="SECT2"
+><H2
+CLASS="SECT2"
+><A
+NAME="MISC"
+>7.6. Miscellaneous</A
+></H2
><DIV
CLASS="SECT3"
><H4
CLASS="SECT3"
><A
NAME="ACCEPT-INTERCEPTED-REQUESTS"
->7.5.5. accept-intercepted-requests</A
+>7.6.1. accept-intercepted-requests</A
></H4
><P
></P
CLASS="SECT3"
><A
NAME="ALLOW-CGI-REQUEST-CRUNCHING"
->7.5.6. allow-cgi-request-crunching</A
+>7.6.2. allow-cgi-request-crunching</A
></H4
><P
></P
CLASS="SECT3"
><A
NAME="SPLIT-LARGE-FORMS"
->7.5.7. split-large-forms</A
+>7.6.3. split-large-forms</A
></H4
><P
></P
CLASS="SECT3"
><A
NAME="KEEP-ALIVE-TIMEOUT"
->7.5.8. keep-alive-timeout</A
+>7.6.4. keep-alive-timeout</A
></H4
><P
></P
>Effect if unset:</DT
><DD
><P
-> Connections are not reused.
+> Connections are not kept alive.
</P
></DD
><DT
>Notes:</DT
><DD
><P
+> This option allows clients to keep the connection to <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+>
+ alive. If the server supports it, <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> will keep
+ the connection to the server alive as well. Under certain
+ circumstances this may result in speed-ups.
+ </P
+><P
+> By default, <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> will close the connection to the server if
+ the client connection gets closed, or if the specified timeout
+ has been reached without a new request coming in. This behaviour
+ can be changed with the <A
+HREF="#CONNECTION-SHARING"
+TARGET="_top"
+>connection-sharing</A
+> option.
+ </P
+><P
> This option has no effect if <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
</P
></DD
><DT
+>Examples:</DT
+><DD
+><P
+> keep-alive-timeout 300
+ </P
+></DD
+></DL
+></DIV
+></DIV
+><DIV
+CLASS="SECT3"
+><H4
+CLASS="SECT3"
+><A
+NAME="CONNECTION-SHARING"
+>7.6.5. connection-sharing</A
+></H4
+><P
+></P
+><DIV
+CLASS="VARIABLELIST"
+><DL
+><DT
+>Specifies:</DT
+><DD
+><P
+> Whether or not outgoing connections that have been kept alive
+ should be shared between different incoming connections.
+ </P
+></DD
+><DT
+>Type of value:</DT
+><DD
+><P
+> <TT
+CLASS="REPLACEABLE"
+><I
+>0 or 1</I
+></TT
+>
+ </P
+></DD
+><DT
+>Default value:</DT
+><DD
+><P
+>None</P
+></DD
+><DT
+>Effect if unset:</DT
+><DD
+><P
+> Connections are not shared.
+ </P
+></DD
+><DT
+>Notes:</DT
+><DD
+><P
+> This option has no effect if <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+>
+ has been compiled without keep-alive support, or if it's disabled.
+ </P
+></DD
+><DT
>Notes:</DT
><DD
><P
There are also a few privacy implications you should be aware of.
</P
><P
-> Outgoing connections are shared between clients (if there are more
- than one) and closing the client that initiated the outgoing connection
- does not affect the connection between <SPAN
+> If this option is effective, outgoing connections are shared between
+ clients (if there are more than one) and closing the client that initiated
+ the outgoing connection does no longer affect the connection between <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
-> and the server unless
- the client's request hasn't been completed yet. If the outgoing connection
- is idle, it will not be closed until either <SPAN
+>
+ and the server unless the client's request hasn't been completed yet.
+ </P
+><P
+> If the outgoing connection is idle, it will not be closed until either
+ <SPAN
CLASS="APPLICATION"
>Privoxy's</SPAN
->
- or the server's timeout is reached. While it's open, the server knows
- that the system running <SPAN
+> or the server's timeout is reached.
+ While it's open, the server knows that the system running <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> is still
+ there.
+ </P
+><P
+> If there are more than one client (maybe even belonging to multiple users),
+ they will be able to reuse each others connections. This is potentially
+ dangerous in case of authentication schemes like NTLM where only the
+ connection is authenticated, instead of requiring authentication for
+ each request.
+ </P
+><P
+> If there is only a single client, and if said client can keep connections
+ alive on its own, enabling this option has next to no effect. If the client
+ doesn't support connection keep-alive, enabling this option may make sense
+ as it allows <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
-> is still there.
+> to keep outgoing connections alive even if the client
+ itself doesn't support it.
+ </P
+><P
+> This option should only be used by experienced users who
+ understand the risks and can weight them against the benefits.
</P
></DD
><DT
>Examples:</DT
><DD
><P
-> keep-alive-timeout 300
+> connection-sharing 1
</P
></DD
></DL
CLASS="SECT3"
><A
NAME="SOCKET-TIMEOUT"
->7.5.9. socket-timeout</A
+>7.6.6. socket-timeout</A
></H4
><P
></P
></DL
></DIV
></DIV
+><DIV
+CLASS="SECT3"
+><H4
+CLASS="SECT3"
+><A
+NAME="MAX-CLIENT-CONNECTIONS"
+>7.6.7. max-client-connections</A
+></H4
+><P
+></P
+><DIV
+CLASS="VARIABLELIST"
+><DL
+><DT
+>Specifies:</DT
+><DD
+><P
+> Maximum number of client connections that will be served.
+ </P
+></DD
+><DT
+>Type of value:</DT
+><DD
+><P
+> <TT
+CLASS="REPLACEABLE"
+><I
+>Positive number.</I
+></TT
+>
+ </P
+></DD
+><DT
+>Default value:</DT
+><DD
+><P
+>None</P
+></DD
+><DT
+>Effect if unset:</DT
+><DD
+><P
+> Connections are served until a resource limit is reached.
+ </P
+></DD
+><DT
+>Notes:</DT
+><DD
+><P
+> <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> creates one thread (or process) for every incoming client
+ connection that isn't rejected based on the access control settings.
+ </P
+><P
+> If the system is powerful enough, <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> can theoretically deal with
+ several hundred (or thousand) connections at the same time, but some
+ operating systems enforce resource limits by shutting down offending
+ processes and their default limits may be below the ones <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> would
+ require under heavy load.
+ </P
+><P
+> Configuring <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> to enforce a connection limit below the thread
+ or process limit used by the operating system makes sure this doesn't
+ happen. Simply increasing the operating system's limit would work too,
+ but if <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> isn't the only application running on the system,
+ you may actually want to limit the resources used by <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+>.
+ </P
+><P
+> If <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> is only used by a single trusted user, limiting the
+ number of client connections is probably unnecessary. If there
+ are multiple possibly untrusted users you probably still want to
+ additionally use a packet filter to limit the maximal number of
+ incoming connections per client. Otherwise a malicious user could
+ intentionally create a high number of connections to prevent other
+ users from using <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+>.
+ </P
+><P
+> Obviously using this option only makes sense if you choose a limit
+ below the one enforced by the operating system.
+ </P
+></DD
+><DT
+>Examples:</DT
+><DD
+><P
+> max-client-connections 256
+ </P
+></DD
+></DL
+></DIV
+></DIV
></DIV
><DIV
CLASS="SECT2"
CLASS="SECT2"
><A
NAME="WINDOWS-GUI"
->7.6. Windows GUI Options</A
+>7.7. Windows GUI Options</A
></H2
><P
> <SPAN
></DIV
></BODY
></HTML
->
+>
\ No newline at end of file
projects / privoxy.git / blobdiff