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Hello Aaron & Johannes,

I found some time to check my described setup in a very simplified 
environment:

HP Photosmart <-> Switch <-> Print/Scan Server

The scanning/printing client is also connected to the switch. Every client is 
on the same private subnet.
The scan server is now running openSUSE 10.2 & hplip 1.7.4a. And I can confirm 
again that this setup DOES NOT WORK with hplip > 1.6.10; the standard 1.6.10 
distribution included in SuSE 10.2 worked just fine.
Of course printing and local scanning is working with the new hplip release as 
well, but as I already said there has to be a bug in hplip > 1.6.10 which 
does not allow the sane network daemon to connect to the hpaio-backend using 
a networked Photosmart.

On Tuesday 24 April 2007 15:36:45 Johannes Meixner wrote:
> Hello,
>
> On Apr 13 08:31 Aaron wrote (shortened):
> > Honestly I haven't testing this configuration--it should work--in theory.
>
> Using HPLIP on a machine "A" and then access a scanner from
> a machine "B" via saned running on "A" and using the net
> meta-backend on "B" works well for me using various versions
> of HPLIP and using a USB all in one device (HP LaserJet 1220)
> and a network all in one device (Officejet 7210) in both
> directions i.e. accessing from "A" to "B" and vice versa
> (with HPLIP running and disabled on the current "client" machine).
>
> In short: For me everything worked and works.
OK, but you are using a USB connection. This might make a difference.

>
> Perhaps you have some kind of restrictive firewall settings?
>
> Clients contact saned via the sane-port (TCP port 6566)
> but scanning data is transferred via an additional random port
> (like ftp but with a random data port), see "man saned".
> I.e. only TCP port 6566 is not sufficient.
> Make sure no port is blocked by a firewall.
As you can see I'm not using a firewall in my current setup.

>
> When port 6566 doesn't work, "scanimage -L" would not show
> the remote scanner.
scanimage -L on the scan server works fine:
suse102:~ # scanimage -L
device `hpaio:/net/Photosmart_C5100_series?ip=192.168.2.10' is a 
Hewlett-Packard Photosmart_C5100_series all-in-one

> When only port 6566 works, "scanimage -L" would show the
> remote scanner but real scanning e.g. a test via
> "scanimage -d <sane-device> -T" would not work.
scanimage -d works on the server as well:
suse102:~ # scanimage -d hpaio:/net/Photosmart_C5100_series?ip=192.168.2.10 -T

scanimage: scanning image of size 638x877 pixels at 24 bits/pixel
scanimage: acquiring RGB frame, 8 bits/sample
scanimage: reading one scanline, 1914 bytes...  PASS
scanimage: reading one byte...          PASS
scanimage: stepped read, 2 bytes...     PASS
scanimage: stepped read, 4 bytes...     PASS
scanimage: stepped read, 8 bytes...     PASS
scanimage: stepped read, 16 bytes...    PASS
scanimage: stepped read, 32 bytes...    PASS
scanimage: stepped read, 64 bytes...    PASS
scanimage: stepped read, 128 bytes...   PASS
scanimage: stepped read, 256 bytes...   PASS
scanimage: stepped read, 512 bytes...   PASS
scanimage: stepped read, 1024 bytes...  PASS
scanimage: stepped read, 2048 bytes...  PASS
scanimage: stepped read, 2047 bytes...  PASS
scanimage: stepped read, 1023 bytes...  PASS
scanimage: stepped read, 511 bytes...   PASS
scanimage: stepped read, 255 bytes...   PASS
scanimage: stepped read, 127 bytes...   PASS
scanimage: stepped read, 63 bytes...    PASS
scanimage: stepped read, 31 bytes...    PASS
scanimage: stepped read, 15 bytes...    PASS
scanimage: stepped read, 7 bytes...     PASS
scanimage: stepped read, 3 bytes...     PASS
suse102:~ #                                

Since it didn't work with Gentoo, Debian and SuSE (tried to setup all of them 
as the scan server) I believe that this problem is NOT a 
distribution-specific issue!

Aaron, please test this setup as well. I bet you will very likely not be able 
to successfully access the scanner of a networked Photosmart using the sane 
network daemon with newer hplip releases.

Regards, Dan
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