Provided by: sane-utils_1.0.19-1ubuntu3_i386 bug

NAME

       saned - SANE network daemon

SYNOPSIS

       saned [-d|-s [n]]

DESCRIPTION

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

OPTIONS

       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
       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.

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

CONFIGURATION

       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
       tcpwrappers 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
       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:

              scan-client.somedomain.firm
              # this is a comment
              192.168.0.1
              192.168.2.12/29
              [::1]
              [2001:7a8:185e::42:12]/64

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

       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 /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 following form in /etc/inetd.conf
       instead:

              sane-port   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 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
       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
              {
                 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-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.

RESTRICTIONS

       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.

FILES

       /etc/hosts.equiv
              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.

       /etc/sane.d/saned.conf
              Contains  a list of hosts permitted to access local SANE devices
              (see also description of SANE_CONFIG_DIR below).

       /etc/sane.d/saned.users
              If this file contains lines of the form

              user:password:backend

              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.

ENVIRONMENT

       SANE_CONFIG_DIR
              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).

SEE ALSO

       sane(7),   scanimage(1),  xscanimage(1),  xcam(1),  sane-dll(5),  sane-
       net(5), sane-"backendname"(5)
       http://www.penguin-breeder.org/?page=sane-net

AUTHOR

       David Mosberger