saned(8) SANE Scanner Access Now Easy saned(8)
NAME
saned - SANE network daemon
SYNOPSIS
saned [ -a [ username ] ] [ -u username ] [ -b address ] [ -p port ] [
-l ] [ -D ] [ -o ] [ -d n ] [ -e ] [ -h ] [ -B buffer-size ]
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
saned recognises the following options:
-a [username], --alone[=username]
is equivalent to the combination of -l -D -u username options.
However, username is optional and running user will only be set
when specified.
-u username, --user=username
requests that saned drop root privileges and run as the user (and
group) associated with username after binding.
-b address, --bind=address
tells saned to bind to the address given.
-p port, --port=port
tells saned to listen on the port given. A value of 0 tells
saned to pick an unused port. The default is the sane-port
(6566).
-l, --listen
requests that saned run in standalone daemon mode. In this mode,
saned will listen for incoming client connections; inetd(8) is
not required for saned operations in this mode.
-D, --daemonize
will request saned to detach from the console and run in the
background.
-o, --once
requests that saned exits after the first client disconnects.
This is useful for debugging.
-d n, --debug=n
sets the level of saned debug output to n. When compiled with
debugging enabled, this flag may be followed by a number to re-
quest more or less debug info. The larger the number, the more
verbose the debug output. E.g., -d128 will request output of all
debug info. A level of 0 produces no output at all. The default
value is 2.
-e, --stderr
will divert saned debug output to stderr instead of the syslog
default.
-B, --buffer-size=buffer-size
specifies the size of the read buffer used for communication with
the backend in KB. Default value is 1MB.
-h, --help
displays a short help message.
CONFIGURATION
The saned.conf configuration file contains both options for the daemon
and the access list.
data_portrange = min_port - max_port
Specify the port range to use for the data connection. Pick a
port range between 1024 and 65535; don't pick a too large port
range, as it may have performance issues. Use this option if your
saned server is sitting behind a firewall. If that firewall is a
Linux machine, we strongly recommend using the Netfilter nf_con-
ntrack_sane module instead.
data_connect_timeout = timeout
Specify the time in milliseconds that saned will wait for a data
connection. Without this option, if the data connection is not
done before the scanner reaches the end of scan, the scanner will
continue to scan past the end and may damage it depending on the
backend. Specify zero to have the old behavior. The default is
4000ms.
The access list is a list of host names, IP addresses or IP subnets
(CIDR notation) that are permitted to use local SANE devices. IPv6 ad-
dresses 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 host-
name. 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:
# Daemon options
data_portrange = 10000 - 10100
# Access list
scan-client.somedomain.firm
# this is a comment
192.168.0.1
192.168.2.12/29
[::1]
[2001:db8:185e::42:12]/64
The case of the host names does not matter, so AHost.COM is considered
identical to ahost.com.
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 hashing if supported by the client.
ENVIRONMENT
SANE_CONFIG_DIR
This environment variable specifies the list of directories that
may contain the configuration file. On *NIX systems, the direc-
tories are separated by a colon (`:'), under OS/2, they are sepa-
rated 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).
NOTES
saned does not provide confidentiality when communicating with clients.
If saned is exposed directly on the network, other users may be able to
intercept scanned images, or learn passwords for connecting to saned,
with little effort. Client systems should connect to saned through a se-
cure tunnel to the server instead.
saned is not a trusted program and should not run with root privileges.
Refer to /usr/share/doc/libsane/saned/saned.install.md for details on
configuring saned as a service.
SEE ALSO
sane(7), scanimage(1), xscanimage(1), xcam(1), sane-dll(5), sane-net(5),
sane-"backendname"(5), inetd(8), xinetd(8), systemd(1)
http://www.penguin-breeder.org/?page=sane-net
AUTHOR
David Mosberger
29 Sep 2017 saned(8)
Generated by dwww version 1.16 on Sat Oct 3 06:26:11 CEST 2026.