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a web interface for the scanner? how can i use it? btw, i tried it with the latest ubuntu in a livesystem, and the result was: scanimage: open of device brother4:net1;dev0 failed: Invalid argument ;)

All of our Brother scanner/printers have a web-Interface to set such things up. I'm out of ideas now. Network scans are working on our hardware is all I can say. Maybe someone else has a hint.

is it possible to change the used protocol to FTP? i found this, and on windows FTP are used https://support.brother.com/g/s/id/htmldoc/mfc/cv_mfcl2750dw/uke/html/GUID-4BC1C997-276E-4BE6-BDAD-5BDC47114E7E_53.html

1) this file is correct

2)in /etc/sane.d/isn't a brother firmware file

3)firmware permission? where can i find these firmware?

scanimage -L
device `brother4:net1;dev0' is a Brother scanner DCP-L2510D
device `net:[::1]:brother4:net1;dev0' is a Brother scanner DCP-L2510D
-----------------------------
-----------------------------
ping
test scanner
ping 192.168.2.1 -w 10

PING 192.168.2.1 (192.168.2.1) 56(84) Bytes an Daten.
64 Bytes von 192.168.2.1: icmp_seq=1 ttl=64 Zeit=3.58 ms
64 Bytes von 192.168.2.1: icmp_seq=2 ttl=64 Zeit=1.94 ms
64 Bytes von 192.168.2.1: icmp_seq=3 ttl=64 Zeit=2.70 ms
64 Bytes von 192.168.2.1: icmp_seq=4 ttl=64 Zeit=3.82 ms
64 Bytes von 192.168.2.1: icmp_seq=5 ttl=64 Zeit=3.86 ms
64 Bytes von 192.168.2.1: icmp_seq=6 ttl=64 Zeit=3.58 ms
64 Bytes von 192.168.2.1: icmp_seq=7 ttl=64 Zeit=1.50 ms
64 Bytes von 192.168.2.1: icmp_seq=8 ttl=64 Zeit=4.24 ms
64 Bytes von 192.168.2.1: icmp_seq=9 ttl=64 Zeit=4.78 ms
64 Bytes von 192.168.2.1: icmp_seq=10 ttl=64 Zeit=4.07 ms

--- 192.168.2.1 ping-Statistik ---
10 Pakete übertragen, 10 empfangen, 0% packet loss, time 9017ms
rtt min/avg/max/mdev = 1.500/3.405/4.777/0.986 ms

Okay, thank you. I am out of ideas except for one: IPv4 vs. IPv6 problem? What is the content of /opt/brother/scanner/brscan4/brsanenetdevice4.cfg? Did you see https://wiki.archlinux.org/title/SANE#Invalid_argument

@harvey ok, i tried it with xsane, and nothing happened

[ 4416.626180] donar systemd[1]: Started Scanner Service ([::1]:59118).
[ 4416.631698] donar saned[6443]: saned (AF-indep+IPv6+systemd) from sane-backends 1.2.1 starting up
[ 4416.631834] donar saned[6443]: check_host: access by remote host: ::1
[ 4416.631851] donar saned[6443]: init: access granted to tom@::1
[ 4431.368562] donar saned[6443]: saned exiting
[ 4431.371962] donar systemd[1]: saned@2-::1:6566-::1:59118.service: Deactivated successfully.

Sorry for being nuisant but I'd give xsane a try before starting to access the scanner via shell. Just to be sure...

@harvey xsane can't bring a advantage over scanimage, because xsane is only a gui frontend for scanimage :(

[  770.726179] donar systemd[1]: Started Scanner Service ([::1]:55234).
[  770.731921] donar saned[2585]: saned (AF-indep+IPv6+systemd) from sane-backends 1.2.1 starting up
[  770.732253] donar saned[2585]: check_host: access by remote host: ::1
[  770.732290] donar saned[2585]: init: access granted to tom@::1
[  774.793243] donar saned[2585]: saned exiting
[  774.795971] donar systemd[1]: saned@3-::1:6566-::1:55234.service: Deactivated successfully.

Please give xsane a try, it works for me.

the same result on my second notebook :(

tom@frija ~/compile/brscan4 % scanimage --format=jpeg --output-file vermoegensAenderunge.jpeg --progress
scanimage: open of device brother4:net1;dev0 failed: Invalid argument