Dev1 Galaxy Forum / [SOLVED] Connection to localhost:631

Re: [SOLVED] Connection to localhost:631

dummy@example.com (rolfie) — Fri, 08 Sep 2023 17:58:32 +0000

@Andre4freedom: The automatic setup is called IPP. When I bought the printer and installed it, can't remember if it was under Beowulf or Chimaera, I got a bunch of entries in the cups administration, and none really worked. I was totally confused getting in contact to something I never saw before. So I switched off this IPP feature in the printer, deleted all the not working printers, and configured it the traditional way with a PPD file and an individual entry in cups. Kept this for Daedalus ...

Re: [SOLVED] Connection to localhost:631

dummy@example.com (rolfie) — Fri, 08 Sep 2023 17:51:53 +0000

Well, problem solved.

Nemo claimed that cupsd.conf is a binary file, so initially I didn't bother to look at it. Got a hint from the German Debian forum to look at the "Listen" entries in the cupsd.conf. Tried to open it with geany in a root terminal, and found that the contents was plain text. Well, the "Listen" entries on my workstation were both identical pointing at /run/cups/cups.sock. Changed the first one to localhost:631, restarted the cups service, and voila, the problem is gone. Somehow the file was modified some time in Feb this year. There is a backup with the same timestamp which is one line longer due to a comment in line 1, the listen entries are also bad. Now I get:

# ss -ltnp sport 631
State                  Recv-Q                 Send-Q                                 Local Address:Port                                 Peer Address:Port                Process                                          
LISTEN                 0                      128                                        127.0.0.1:631                                       0.0.0.0:*                    users:(("cupsd",pid=18184,fd=7))                
LISTEN                 0                      128                                            [::1]:631                                          [::]:*

Crosschecked with my laptop which is working: the cupsd.conf looks different and is significantly bigger. There are lots of comments in the file, not only directives for cups like on my workstation.

Interesting troubeshooting ...

Re: [SOLVED] Connection to localhost:631

dummy@example.com (Andre4freedom) — Fri, 08 Sep 2023 16:47:33 +0000

Only my 2 pennies to it:
now I usually install Devuan (Daedalus) plain standard, Cinnamon DE, Console Productivity, SSH Server and Standard System Utilities, choosing OpenRC etc.
I don't even bother to check or configure any printer.
The CUPS-Browsed or Bonjour protocols seem to do all work.
When i check in Menu - Administration - Print Settings, my printer is already there. The same holds true for the scanner (MFP Printers).
This automatic setup seems to work with several modern printer brands. I can confirm this for Brother, HP and Canon.
I wonder if your Kyocera is an older model or configured differently.
My printer was set up just by connecting it to power and the internal network (I gave it a fixed IP address in the same subnet as the workstations)
So, maybe, this could work for modern Kyocera printers as well???

Re: [SOLVED] Connection to localhost:631

dummy@example.com (boughtonp) — Fri, 08 Sep 2023 16:25:50 +0000

So you have a bad config file, which is likely why the service fails to start.

cupsd.conf should not be a binary file - what is telling you that it is? (The error log say there are unknown directives, which suggest it is not binary, but maybe for a different version.)

Try checking file /etc/cups/*cupsd* to see if you have a backup that reports as "ASCII text" - if so, you could try diff to see if it can identify a problem, and/or rename the current bad file and copy the backup file into its place.

Re: [SOLVED] Connection to localhost:631

dummy@example.com (rolfie) — Fri, 08 Sep 2023 16:04:40 +0000

Ping to localhost works as well as printing.

$ ping -c 5 localhost
PING localhost(localhost (::1)) 56 data bytes
64 bytes from localhost (::1): icmp_seq=1 ttl=64 time=0.014 ms
64 bytes from localhost (::1): icmp_seq=2 ttl=64 time=0.037 ms
64 bytes from localhost (::1): icmp_seq=3 ttl=64 time=0.030 ms
64 bytes from localhost (::1): icmp_seq=4 ttl=64 time=0.037 ms
64 bytes from localhost (::1): icmp_seq=5 ttl=64 time=0.030 ms

--- localhost ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4088ms
rtt min/avg/max/mdev = 0.014/0.029/0.037/0.008 ms

curl does not work either

$ curl -Iv localhost:631
*   Trying 127.0.0.1:631...
* connect to 127.0.0.1 port 631 failed: Verbindungsaufbau abgelehnt
*   Trying [::1]:631...
* connect to ::1 port 631 failed: Verbindungsaufbau abgelehnt
* Failed to connect to localhost port 631 after 0 ms: Couldn't connect to server
* Closing connection 0
curl: (7) Failed to connect to localhost port 631 after 0 ms: Couldn't connect to server

No output on

# ss -ltnp sport 631
State         Recv-Q         Send-Q                  Local Address:Port                   Peer Address:Port         Process

Log entries

# tail /var/log/cups/*_log
==> /var/log/cups/access_log <==
localhost - - [08/Sep/2023:14:10:30 +0200] "POST / HTTP/1.1" 200 152 Cancel-Subscription successful-ok
localhost - - [08/Sep/2023:17:33:48 +0200] "POST / HTTP/1.1" 200 349 Create-Printer-Subscriptions successful-ok
localhost - - [08/Sep/2023:17:33:48 +0200] "POST / HTTP/1.1" 200 176 Create-Printer-Subscriptions successful-ok
localhost - - [08/Sep/2023:17:36:11 +0200] "POST / HTTP/1.1" 200 360 Create-Printer-Subscriptions successful-ok
localhost - - [08/Sep/2023:17:37:20 +0200] "POST / HTTP/1.1" 401 123 Cancel-Subscription successful-ok
localhost - root [08/Sep/2023:17:37:20 +0200] "POST / HTTP/1.1" 200 123 Cancel-Subscription successful-ok
localhost - - [08/Sep/2023:17:37:20 +0200] "POST / HTTP/1.1" 200 152 Cancel-Subscription successful-ok
localhost - - [08/Sep/2023:17:38:23 +0200] "POST / HTTP/1.1" 200 349 Create-Printer-Subscriptions successful-ok
localhost - - [08/Sep/2023:17:38:23 +0200] "POST / HTTP/1.1" 200 176 Create-Printer-Subscriptions successful-ok
localhost - - [08/Sep/2023:17:38:32 +0200] "POST / HTTP/1.1" 200 360 Create-Printer-Subscriptions successful-ok

==> /var/log/cups/error_log <==
E [08/Sep/2023:17:33:48 +0200] Unknown directive SubscriptionPrivateValues on line 128 of /etc/cups/cupsd.conf.
W [08/Sep/2023:17:33:48 +0200] Printer drivers are deprecated and will stop working in a future version of CUPS. See https://github.com/OpenPrinting/cups/issues/103
E [08/Sep/2023:17:33:48 +0200] Missing value on line 2039 of /var/cache/cups/job.cache.
W [08/Sep/2023:17:38:23 +0200] Duplicate listen address "/run/cups/cups.sock" ignored.
E [08/Sep/2023:17:38:23 +0200] Unknown directive JobPrivateAccess on line 125 of /etc/cups/cupsd.conf.
E [08/Sep/2023:17:38:23 +0200] Unknown directive JobPrivateValues on line 126 of /etc/cups/cupsd.conf.
E [08/Sep/2023:17:38:23 +0200] Unknown directive SubscriptionPrivateAccess on line 127 of /etc/cups/cupsd.conf.
E [08/Sep/2023:17:38:23 +0200] Unknown directive SubscriptionPrivateValues on line 128 of /etc/cups/cupsd.conf.
W [08/Sep/2023:17:38:23 +0200] Printer drivers are deprecated and will stop working in a future version of CUPS. See https://github.com/OpenPrinting/cups/issues/103

Can't read cupsd.conf, is a binary file.

Looks like no cups service is running, but why? Restarting the service has no effect on the problem.

# sh /etc/init.d/cups start
Starting Common Unix Printing System: cupsd.
# ss -ltnp sport 631
State                    Recv-Q                    Send-Q                                       Local Address:Port                                        Peer Address:Port                    Process

Re: [SOLVED] Connection to localhost:631

dummy@example.com (boughtonp) — Fri, 08 Sep 2023 14:15:26 +0000

rolfie wrote:

my up to date FF-ESR tells me no connection to https://localhost:631.

Browsers frequently hide real errors, and complicate things with caches and cookies; usually better to diagnose things directly.

What does curl -Iv localhost:631 say?

Check with ss -ltnp sport 631 (as sudo/root) whether the server is running?

Anything relevant in the logs - i.e: tail /var/log/cups/*_log ?

Re: [SOLVED] Connection to localhost:631

dummy@example.com (rolfie) — Fri, 08 Sep 2023 11:38:40 +0000

Using http or https makes no difference. Emptied the cache, cookies, still doesn't work. A ping to 127.0.0.1 or localhost is working.

Crosschecked against my laptop: same FF-ESR version on board, connection to localhost:631 is possible, I get the cups menu.

Compared hosts and interfaces contents, the same for localhost. Difference between the two systems is that I let the network-manager handle all connections on the laptop while I use fixed IPs on my workstation.

Is it possible that I get interference from there? Tried to remove the network-manager on my workstation, but that also wants to remove Cinnamon.

Re: [SOLVED] Connection to localhost:631

dummy@example.com (ralph.ronnquist) — Fri, 08 Sep 2023 00:19:35 +0000

@rolfie, use http without the s

Re: [SOLVED] Connection to localhost:631

dummy@example.com (Dutch_Master) — Thu, 07 Sep 2023 21:32:18 +0000

I'm on FF102.10.0esr (64-bit) and it works for me.

Re: [SOLVED] Connection to localhost:631

dummy@example.com (rolfie) — Thu, 07 Sep 2023 21:19:41 +0000

Tried that, no effect. Printing works.

Re: [SOLVED] Connection to localhost:631

dummy@example.com (Dutch_Master) — Thu, 07 Sep 2023 20:50:51 +0000

Is CUPS actually running?

As root, do:

sh /etc/init.d/cups start

Then try connecting to localhost:631 again.

[SOLVED] Connection to localhost:631

dummy@example.com (rolfie) — Thu, 07 Sep 2023 20:45:52 +0000

I am running Daedalus with Cinnamon and Firefox ESR since about 10 months on my workstation. I did set up my Kyocera P6230 when configuring the system during this time, and I did use https://localhost:631 in FF to configure my printer. Now I tried again to see if I could find some settings again, and my up to date FF-ESR tells me no connection to https://localhost:631.

I have checked hosts, network settings and anything I could think about. Could find nothing wrong. No more connection to localhost re. setting up cups. Can't tell when I last used it.

What may have changed meanwhile?