Network Scanner Service. It provide access to your scanner from any workstation in the network.
Now lets see the manual of saned service.Manual saned:NAME
saned - SANE network daemonSYNOPSIS
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:
# this is a comment
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 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 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
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 daemonRESTRICTIONS
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
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
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.ENVIRONMENT
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)