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Under GNU General Public License
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saned(8) SANE Scanner Access Now Easy saned(8)
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 com-
piled 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 spe-
cial 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 connec-
tion. 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 multi-
ple 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 direc-
tory 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
sane-backends 1.0.18 30 May 2004 saned(8)
Generated by $Id: phpMan.php,v 4.49 2006/02/26 13:18:18 chedong Exp $ Author: Che Dong
On Apache/1.3.37 (Unix) mod_throttle/3.1.2 FrontPage/5.0.2.2635 mod_psoft_traffic/0.2 mod_ssl/2.8.28 OpenSSL/0.9.8b
Under GNU General Public License
2009-01-07 20:57 @38.103.63.55 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)