[sane-devel] Problem with Sane over network

Dr.-Ing. Dieter Jurzitza dieter.jurzitza at t-online.de
Sun Apr 12 20:08:37 BST 2020

Hello Luca,
ok. Ping works - this is an initial step. Look here on my small box:

fred at scanner:~ $ systemctl status saned.socket
‚óŹ saned.socket - saned incoming socket
   Loaded: loaded (/lib/systemd/system/saned.socket; enabled; vendor preset: 
   Active: active (listening) since Sun 2020-04-12 11:07:57 CEST; 9h ago
   Listen: [::]:6566 (Stream)
 Accepted: 0; Connected: 0

does this show the same on your site? 

On the "main" pc I have only the net backend enabled:
cat /etc/sane.d/dll.conf | sed '/^#/d'

can you check this? sane-find-scanner finds nothing. 

fred at djunix:/etc/sane.d> scanimage -L
device `net:scanner:hp:libusb:001:002' is a Hewlett-Packard ScanJet 63x0C 
flatbed scanner
default device is `net:scanner.karlsruhe.edu:hp:libusb:001:002'

Hope this helps,


Am Sonntag, 12. April 2020, 20:47:59 CEST schrieb Luca Bertoncello:
> Am 12.04.2020 um 20:22 schrieb Dr.-Ing. Dieter Jurzitza:
> Hi Dieter,
> > can you ping the scanner from your "other" PC? If not you will have to
> > find
> Of course, they do...
> > the reason for this. I would start with all devices in the same network
> > and
> > verify whether or not you can ping the scanner device. If not there i>
> > something utterly wrong with your network configuration.
> I created a VM in the same network of the Raspi, with Debian Buster, too.
> I installed a fresh sane on this VM and tried to detect the scanner.
> Nothing...
> I see in the syslog of the Raspi, that the VM is authorized (access
> granted), I see with tcpdump on both devices data, but scanimage does
> NOT detect any network scanner...
> No Firewall between the devices, no network restriction, same version of
> all programs.
> Curiously, I can see Broadbast packets sent from both the Raspi and the
> VM, but the answer to these queries comes just from the network printers
> in the network.
> > Moreover: if your scanner should be promoted on a net that is not routed
> > through the ethernet or wlan card you'll have difficulties to get things
> > up
> > and running.
> The network is my network for printers. It has access to
> my NTP-Server and my Mail-Server and my PC-Network ( has
> full access to the printer network.
> With all printers and the old scanner (HP OfficeJet 6500a) it works...
> Any idea?
> Thanks
> Luca Bertoncello
> (lucabert at lucabert.de)

Dr.-Ing. Dieter Jurzitza                    76131 Karlsruhe

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