[sane-devel] Cascading saned servers
jmozdzen at nde.ag
Tue Jul 1 11:32:32 UTC 2014
this is a resend of my message from June 18 - any hints on how I might
improve my description, in order to find someone willing to share some
--- cut here ---
I'm attempting to use cascading saned servers, in other words: I'm
trying to share a scanner that is reachable from the "saned" system
via its network back-end.
Technically, this works. Unfortunately, either saned or the clients
are not prepared for this, as the network scanners are not not listed
via "xsane" nor "scanimage -L".
The manual pages and network resources I found during my search seem
ambiguous: Some people talk about "scanners local to the saned
server", while the man page says "[saned] allows remote clients to
access image acquisition devices available on the local host", which
includes those reachable via network, too.
I've tested with saned from sane-backends-1.0.20-7.6.1 (SLES11SP3) and
scanimage from sane-backends-1.0.23-9.2.3.i586 (Opensuse 13.1) and
- client machine (Opensuse 13.1)
- central saned server (SLES11SP3) "sanedserver.company.com"
- remote saned server (i.e. Opensuse 13.1)
When specifying the network scanner via "scanimage -d
net:sanedserver.company.com:net:anothersanedserver.company.com:somedriver:somescanner" on the client machine, I can scan successfully, although running "scanimage -L" wouldn't list that device. "xsane" users are left out, as they're presented the same list as the one from "scanimage -L" , thus not seeing the cascaded scanner on the client
Running "scanimage -L" on the central saned server will list the
We're using this design because of hub&spoke configurations, where
remote saned servers will only permit the central server in their
/etc/saned.conf and all clients connect only to the central saned
To be precise, it's the device listing that doesn't seem to work.
Probably the central saned server doesn't report network-connected
scanners to its clients. Is this "working as designed", or have I hit
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