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RedHat 9 (Linux i386) - man page for saned (redhat section 1)

saned(1)			     General Commands Manual				 saned(1)

       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 host.

       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 debug-
       ging enabled, these flags may be followed 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.

       First  and foremost: please do not install saned as setuid root without due consideration.
       Especially when using dynamic linking, there is a potential for introducing security holes
       when running this program as root.

       The  contents of the saned.conf file is a list of host names or IP addresses that are per-
       mitted to use local SANE devices.  Connections from localhost 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.  The configuration line normally looks like this:

	      sane stream tcp nowait saned.saned /usr/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 follow-
       ing form in /etc/inetd.conf instead:

	      sane stream tcp nowait saned.saned /usr/sbin/tcpd /usr/sbin/saned

       Note that both examples assume that there is a saned group and a saned user.  If you  fol-
       low  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 scanner 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	     = 6566
		 socket_type = stream
		 wait	     = no
		 user	     = saned
		 group	     = saned
		 server      = /usr/sbin/saned

       Finally, it is also necessary to add a line of the following form to /etc/services:

	      sane 6566/tcp # SANE network scanner daemon

       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 fil-

	      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  descrip-
	      tion 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  sup-
	      ported 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 configuration file is searched in two default directories: first,  the  current
	      working  directory  (".") and then in /etc/sane.d.  If the value of the environment
	      variable ends with the directory separator character, 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 "/etc/sane.d" being searched (in this order).

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


       David Mosberger

					    8 Oct 2002					 saned(1)

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