Is there any way to specify The IP address of the Deivce instead of using broadcast

[ihipop]

I connected to my office in another broadcast-isolated subnet， eg VPN:192.168.2.0/24 LAN:192.168.1.0/24 These two subnets can communicate with each other, but the broadcast is isolated because they are in different subnets with different broadcast address

the official BROTHER iPrint&Scan APP can Add printer &scaner via IP address, so it can access printers&scaners accross the subnets

[alexpevzner]

Yes, there are configuration file: /etc/sane.d/airscan.conf

You may manually add devices into the appropriate section:

[devices]
"Kyocera MFP Scanner" = http://192.168.1.102:9095/eSCL

There is also the airscan-discover utility, which will look around and generate a template of the [devices] section automatically. If your network is split into several broadcast domains, you may run it once in the computer, connected to the same broadcast domain as your scanner and then save and use the generated configuration.

Note, the path part of device URL is almost always /eSCL for the eSCL devices, but very different and hard to guess for WSD devices.

[ihipop]

Thanks for your kindly and quick response

Note, the path part of device URL is almost always /eSCL for the eSCL devices, but very different and hard to guess for WSD devices.

I tested with airscan-discover when I was in the same subnet of my printer devices

[devices]
  Brother MFC-T800W = http://172.****:80/WebServices/ScannerService, WSD
  FX DocuPrint M268 dw = http://172.****:80/WebServices/ScannerService, WSD

it seems that both Brother MFC-T800W and FX DocuPrint M268 dw use /WebServices/ScannerService, WSD as the path part

this can be a reference for someone else that can not run airscan-discover in the same broadcast LAN

Thanks for alexpevzner,again