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191 wiersze
8.0 KiB
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<TITLE>saned.8</TITLE>
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<BODY BGCOLOR=#FFFFFF TEXT=#000000><H1 ALIGN=CENTER><IMG SRC="/images/sane.png" HEIGHT=117 WIDTH=346></H1>
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<H1>saned.8</H1>
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<HR>
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<PRE>
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<!-- Manpage converted by man2html 3.0.1 -->
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<B><A HREF="saned.8.html">saned(8)</A></B> SANE Scanner Access Now Easy <B><A HREF="saned.8.html">saned(8)</A></B>
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</PRE>
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<H2>NAME</H2><PRE>
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saned - SANE network daemon
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</PRE>
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<H2>SYNOPSIS</H2><PRE>
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<B>saned</B> [<B>-d</B>|<B>-s</B> [<I>n</I>]]
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</PRE>
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<H2>DESCRIPTION</H2><PRE>
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<B>saned</B> is the SANE (Scanner Access Now Easy) daemon that allows remote
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clients to access image acquisition devices available on the local
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host.
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</PRE>
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<H2>OPTIONS</H2><PRE>
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The <B>-d</B> and <B>-s</B> flags request that <B>saned</B> run in debug mode (as opposed to
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<B><A HREF="inetd.8.html">inetd(8)</A></B> mode). In this mode, <B>saned</B> explicitly waits for a connection
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request. When compiled with debugging enabled, these flags may be fol-
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lowed by a number to request debug info. The larger the number, the
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more verbose the debug output. E.g., <B>-d128</B> will request printing of
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all debug info. Debug level 0 means no debug output at all. The default
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value is 2. If flag <B>-d</B> is used, the debug messages will be printed to
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stderr while <B>-s</B> requests using syslog.
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If <B>saned</B> is run from inetd or xinetd, no option can be given.
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</PRE>
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<H2>CONFIGURATION</H2><PRE>
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First and foremost: <B>saned</B> is not intended to be exposed to the internet
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or other non-trusted networks. Make sure that access is limited by tcp-
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wrappers and/or a firewall setup. Don't depend only on <B>saned</B>'s own
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authentification. Don't run <B>saned</B> as root if it's not necessary. And do
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<B>not</B> install <B>saned</B> as setuid root.
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The contents of the <I>saned.conf</I> file is a list of host names, IP
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addresses or IP subnets (CIDR notation) that are permitted to use local
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SANE devices. IPv6 addresses must be enclosed in brackets, and should
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always be specified in their compressed form. Connections from local-
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host are always permitted. Empty lines and lines starting with a hash
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mark (#) are ignored. A line containing the single character ``+'' is
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interpreted to match any hostname. This allows any remote machine to
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use your scanner and may present a security risk, so this shouldn't be
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used unless you know what you're doing. A sample configuration file is
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shown below:
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scan-client.somedomain.firm
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# this is a comment
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192.168.0.1
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192.168.2.12/29
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[::1]
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[2001:7a8:185e::42:12]/64
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The case of the host names does not matter, so AHost.COM is considered
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identical to ahost.com.
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For <B>saned</B> to work properly, it is also necessary to add a configuration
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line to <I>/etc/inetd.conf</I>. Note that your inetd must support IPv6 if you
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want to connect to saned over IPv6 ; xinetd and openbsd-inetd are known
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to support IPv6, check the documentation for your inetd daemon.
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The configuration line normally looks like this:
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sane-port stream tcp nowait saned.saned /usr/local/sbin/saned
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saned
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However, if your system uses <B><A HREF="tcpd.8.html">tcpd(8)</A></B> for additional security screening,
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you may want to disable saned access control by putting ``+'' in
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<I>saned.conf</I> and use a line of the following form in <I>/etc/inetd.conf</I>
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instead:
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sane-port stream tcp nowait saned.saned /usr/sbin/tcpd
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/usr/local/sbin/saned
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Note that both examples assume that there is a <B>saned</B> group and a <B>saned</B>
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user. If you follow this example, please make sure that the access
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permissions on the special device are set such that <B>saned</B> can access
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the scanner (the program generally needs read and write access to scan-
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ner devices).
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If xinetd is installed on your system instead of inetd the following
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example for xinetd.conf may be helpful:
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# default: off
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# description: The sane server accepts requests
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# for network access to a local scanner via the
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# network.
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service sane-port
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{
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port = 6566
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socket_type = stream
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wait = no
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user = saned
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group = saned
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server = /usr/local/sbin/saned
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}
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Finally, it is also necessary to add a line of the following form to
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<I>/etc/services</I>:
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sane-port 6566/tcp # SANE network scanner daemon
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The official IANA short name for port 6566 is "sane-port". The older
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name "sane" is now deprecated.
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</PRE>
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<H2>RESTRICTIONS</H2><PRE>
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In addition to the control connection (port 6566) saned also uses a
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data connection. The port of this socket is selected by the operating
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system and can't be specified by the user currently. This may be a
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problem if the connection must go through a firewall (packet filter).
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If you must use a packet filter, make sure that all ports > 1024 are
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open on the server for connections from the client.
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</PRE>
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<H2>FILES</H2><PRE>
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<I>/etc/hosts.equiv</I>
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The hosts listed in this file are permitted to access all local
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SANE devices. Caveat: this file imposes serious security risks
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and its use is not recommended.
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<I>/usr/local/etc/sane.d/saned.conf</I>
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Contains a list of hosts permitted to access local SANE devices
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(see also description of <B>SANE_CONFIG_DIR</B> below).
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<I>/usr/local/etc/sane.d/saned.users</I>
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If this file contains lines of the form
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user:password:backend
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access to the listed backends is restricted. A backend may be
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listed multiple times for different user/password combinations.
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The server uses MD5 encryption if supported by the client.
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</PRE>
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<H2>ENVIRONMENT</H2><PRE>
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<B>SANE_CONFIG_DIR</B>
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This environment variable specifies the list of directories that
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may contain the configuration file. Under UNIX, the directories
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are separated by a colon (`:'), under OS/2, they are separated
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by a semi-colon (`;'). If this variable is not set, the config-
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uration file is searched in two default directories: first, the
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current working directory (".") and then in
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/usr/local/etc/sane.d. If the value of the environment variable
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ends with the directory separator character, then the default
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directories are searched after the explicitly specified directo-
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ries. For example, setting <B>SANE_CONFIG_DIR</B> to "/tmp/config:"
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would result in directories "tmp/config", ".", and
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"/usr/local/etc/sane.d" being searched (in this order).
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</PRE>
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<H2>SEE ALSO</H2><PRE>
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<B><A HREF="sane.7.html">sane(7)</A></B>, <B><A HREF="scanimage.1.html">scanimage(1)</A></B>, <B><A HREF="xscanimage.1.html">xscanimage(1)</A></B>, <B><A HREF="xcam.1.html">xcam(1)</A></B>, <B><A HREF="sane-dll.5.html">sane-dll(5)</A></B>, <B>sane-</B>
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<B><A HREF="net.5.html">net(5)</A></B>, <B>sane-"backendname"</B>(5)
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<I>http://www.penguin-breeder.org/?page=sane-net</I>
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</PRE>
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<H2>AUTHOR</H2><PRE>
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David Mosberger
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sane-backends 1.0.17 30 May 2004 <B><A HREF="saned.8.html">saned(8)</A></B>
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</PRE>
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