[cups.bugs] [MOD] STR #1820: IPP Backend tries to connect with forced SSL unexpectedly

[Klaus.Steinberger.Physik.Uni-Muenchen]

[STR New]

I had the situation that the IPP backend tries to connect with forced
encryption in some cases. This leads to the error message "IPP Backend
failed, no such File or Directory" on most printers, or older Cups
Servers.

I found out, that in these cases the Environmental Variable
CUPS_ENCRYPTION was set to "Always". The Encryption Parameters both in
cupsd.conf and client.conf didn't matter.

After some long investigation, I found out, that the order of the
statements "Listen" and "SSLPort" is important!

The following order leads to the described problem:

SSLPort 443
Listen 631

The following order works:

Listen 631
SSLPort 443

Sincerly,
Klaus Steinberger

Link: http://www.cups.org/str.php?L1820
Version: 1.2.1