Saned denies access

Question

I followed the instructions in the SANE daemon tutorial to set up a network scanner.

Everything should be set as needed. However, when I open xsane on a client PC (I tried more than one client, with the same result), the host saned denies access:

Feb  6 14:29:56 xxxxxxx systemd[1]: Started Scanner Service (xxx.xxx.xx.xxx:46488).
Feb  6 14:29:56 xxxxxxx saned[5122]: saned (AF-indep+IPv6) from sane-backends 1.0.26git starting up
Feb  6 14:29:56 xxxxxxx saned[5122]: check_host: access by remote host: localhost
Feb  6 14:29:56 xxxxxxx saned[5122]: init: access by host localhost denied
Feb  6 14:29:56 xxxxxxx saned[5122]: saned exiting

I'm puzzled here by the fact that the access request comes from 'localhost' instead of the client IP/name. If I indeed include localhost in the allowed IPs, the log changes into:

check_host: access by remote host: localhost
init: bad status=22 or procnum=6350304

I tried several things (add saned to lp and saned groups, modify saned@.service, define permission rules for saned), but nothing changes. Of course, the scanner works locally on the host. If, however, I add localhost both in saned.conf and in net.conf, I can connect to the scanner only locally, no second 'localhost' copy is detected by xsane (as mentioned in the tutorial for troubleshooting).

Do you have any idea?

Answer 1

After several efforts, it seems that the solution came by upgrading sane-backends from 1.0.26git to 1.0.27git.

Answer 2

think I found the missing pieces: - package libusb-0.1-4 must be installed - /opt/smfp-common/scanner/lib/libsane-smfp.so.1.0.1 must have chmod a+x set

works like a charm now! now backend smfp is found for the network scanner