Re: Difference between ipp, ipps, http, https CUPS protocols?

[Gene Heskett <gheskett@shentel.net>]

Since I installed stretch on this machine, my printer server since the 
early 2000's, suddenly nothing works. No printers are shared despite 
my checking the box to share it during a reconfiguration of that profile.

What do I do to restore what was an "everything just worked" when this 
machine was running wheezy?  All I get in the logs here when another 
machine attempts to print to one of 4 printer profiles seems to 
indicate no permission.

I only have 1 printer defined because I want to fix whatever is wrong 
before I re-add the others. I have ripped out and, killed the etc/cups
directory in hopes a fresh cops install might fix it.  Didn't happen.

This is my logs:
root@coyote:cups$ cat /var/log/cups/access_log
localhost - - [12/Nov/2019:00:11:00 -0500] "POST / HTTP/1.1" 200 349 Create-Printer-Subscriptions successful-ok
localhost - - [12/Nov/2019:00:11:00 -0500] "POST / HTTP/1.1" 200 176 Create-Printer-Subscriptions successful-ok
root@coyote:cups$ cat /var/log/cups/error_log.1
E [11/Nov/2019:00:10:25 -0500] Unable to open listen socket for address [v1.::1]:631 - Cannot assign requested address.
E [11/Nov/2019:16:16:00 -0500] [cups-deviced] PID 22513 (gutenprint52+usb) stopped with status 1!
E [11/Nov/2019:16:16:00 -0500] [cups-deviced] PID 22511 (begonia) stopped with status 1!
W [11/Nov/2019:16:18:17 -0500] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id 
\'Brother_HL-2140_series-Gray..\' already exists
E [11/Nov/2019:16:18:45 -0500] [cups-deviced] PID 22693 (begonia) stopped with status 1!
E [11/Nov/2019:16:18:45 -0500] [cups-deviced] PID 22695 (gutenprint52+usb) stopped with status 1!
W [11/Nov/2019:16:20:12 -0500] CreateProfile failed: org.freedesktop.ColorManager.AlreadyExists:profile id 
\'Brother_HL-2140_series-Gray..\' already exists

That [v1.::1] looks like shorthand for ipv6, but the nearest ipv6 capable 
connection is probably 185 miles north of here in Pittsburgh PA.
There is not AFAIK, any ipv6 provisioned anyplace on my local ISP the 
local cable folks

So thats probably the first thing to fix, but where is it?

An ip a shows
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:1f:c6:62:fc:bb brd ff:ff:ff:ff:ff:ff
    inet 192.168.71.3/24 brd 192.168.71.255 scope global eth0
       valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:1f:c6:63:07:97 brd ff:ff:ff:ff:ff:ff

Nothing is connected at eth1, this mobo has 2 rj45's on it.

And all of that looks like ipv6 crap, yet I have an ipv6 disable in the 
/proc system someplace I've forgotten as this install is now several 
months old. Or is that volatile and needs to be done at every reboot?.

Thanks for any help.

Cheers, Gene Heskett

-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/gene>