saned man page on JazzOS

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saned(8)		 SANE Scanner Access Now Easy		      saned(8)

       saned - SANE network daemon

       saned [-d|-s [n]]

       saned  is  the SANE (Scanner Access Now Easy) daemon that allows remote
       clients to access image acquisition  devices  available	on  the	 local

       The -d and -s flags request that saned run in debug mode (as opposed to
       inetd(8) mode).	In this mode, saned explicitly waits for a  connection
       request.	 When compiled with debugging enabled, these flags may be fol‐
       lowed by a number to request debug info. The  larger  the  number,  the
       more  verbose  the  debug output.  E.g., -d128 will request printing of
       all debug info. Debug level 0 means no debug output at all. The default
       value  is  2. If flag -d is used, the debug messages will be printed to
       stderr while -s requests using syslog.

       If saned is run from inetd or xinetd, no option can be given.

       First and foremost: saned is not intended to be exposed to the internet
       or other non-trusted networks. Make sure that access is limited by tcp‐
       wrappers and/or a firewall setup. Don't	depend	only  on  saned's  own
       authentification. Don't run saned as root if it's not necessary. And do
       not install saned as setuid root.

       The contents of the saned.conf  file  is	 a  list  of  host  names,  IP
       addresses or IP subnets (CIDR notation) that are permitted to use local
       SANE devices. IPv6 addresses must be enclosed in brackets,  and	should
       always  be specified in their compressed form.  Connections from local‐
       host are always permitted.  Empty lines and lines starting with a  hash
       mark  (#) are ignored.  A line containing the single character ``+'' is
       interpreted to match any hostname.  This allows any remote  machine  to
       use  your scanner and may present a security risk, so this shouldn't be
       used unless you know what you're doing.	A sample configuration file is
       shown below:

	      # this is a comment

       The  case of the host names does not matter, so AHost.COM is considered
       identical to

       For saned to work properly, it is also necessary to add a configuration
       line to /etc/inetd.conf.	 Note that your inetd must support IPv6 if you
       want to connect to saned over IPv6 ; xinetd and openbsd-inetd are known
       to support IPv6, check the documentation for your inetd daemon.

       The configuration line normally looks like this:

	      sane-port	 stream tcp nowait saned.saned /system/resources/sane-
	      backends/1.0.18/sbin/saned saned

       However, if your system uses tcpd(8) for additional security screening,
       you  may	 want  to  disable  saned  access  control by putting ``+'' in
       saned.conf and use a line of  the  following  form  in  /etc/inetd.conf

	      sane-port	 stream	 tcp  nowait  saned.saned /usr/sbin/tcpd /sys‐

       Note that both examples assume that there is a saned group and a	 saned
       user.   If  you	follow	this example, please make sure that the access
       permissions on the special device are set such that  saned  can	access
       the scanner (the program generally needs read and write access to scan‐
       ner devices).

       If xinetd is installed on your system instead of	 inetd	the  following
       example for xinetd.conf may be helpful:

	      # default: off
	      # description: The sane server accepts requests
	      # for network access to a local scanner via the
	      # network.
	      service sane-port
		 port	     = 6566
		 socket_type = stream
		 wait	     = no
		 user	     = saned
		 group	     = saned
		 server	     = /system/resources/sane-backends/1.0.18/sbin/saned

       Finally,	 it  is	 also necessary to add a line of the following form to

	      sane-port 6566/tcp # SANE network scanner daemon

       The official IANA short name for port 6566 is  "sane-port".  The	 older
       name "sane" is now deprecated.

       In  addition  to	 the  control connection (port 6566) saned also uses a
       data connection. The port of this socket is selected by	the  operating
       system  and  can't  be  specified  by the user currently. This may be a
       problem if the connection must go through a firewall  (packet  filter).
       If  you	must  use a packet filter, make sure that all ports > 1024 are
       open on the server for connections from the client.

	      The hosts listed in this file are permitted to access all	 local
	      SANE  devices.  Caveat: this file imposes serious security risks
	      and its use is not recommended.

	      Contains a list of hosts permitted to access local SANE  devices
	      (see also description of SANE_CONFIG_DIR below).

	      If this file contains lines of the form


	      access  to  the  listed backends is restricted. A backend may be
	      listed multiple times for different user/password	 combinations.
	      The server uses MD5 encryption if supported by the client.

	      This environment variable specifies the list of directories that
	      may contain the configuration file.  Under UNIX, the directories
	      are  separated  by a colon (`:'), under OS/2, they are separated
	      by a semi-colon (`;').  If this variable is not set, the config‐
	      uration  file is searched in two default directories: first, the
	      current	working	  directory   (".")   and   then   in	 /sys‐
	      tem/resources/sane-backends/1.0.18/etc/sane.d.   If the value of
	      the environment variable ends with the directory separator char‐
	      acter,  then  the	 default  directories  are  searched after the
	      explicitly  specified   directories.    For   example,   setting
	      SANE_CONFIG_DIR  to  "/tmp/config:"  would result in directories
	      "tmp/config",	".",	 and	 "/system/resources/sane-back‐
	      ends/1.0.18/etc/sane.d" being searched (in this order).

       sane(7),	  scanimage(1),	 xscanimage(1),	 xcam(1),  sane-dll(5),	 sane-
       net(5), sane-"backendname"(5)

       David Mosberger

sane-backends 1.0.18		  30 May 2004			      saned(8)

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