Re: CUPS - set up printer by name instead of IP address

From	"Carlos E.R." <robin_listas@es.invalid>
Newsgroups	comp.os.linux.misc
Subject	Re: CUPS - set up printer by name instead of IP address
Date	2020-04-16 12:53 +0200
Message-ID	<c1qlmg-mmk.ln1@Telcontar.valinor> (permalink)
References	(2 earlier) <r74e65$7l2$2@dont-email.me> <6rsgmg-d3n.ln1@Telcontar.valinor> <r74stg$kof$1@dont-email.me> <v65jmg-1fn.ln1@Telcontar.valinor> <r76pbr$7n0$1@dont-email.me>

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On 15/04/2020 12.58, The Natural Philosopher wrote:
> On 15/04/2020 11:45, Carlos E.R. wrote:
>> On 14/04/2020 19.46, The Natural Philosopher wrote:
>>> On 14/04/2020 15:10, Carlos E.R. wrote:
>>>> On 14/04/2020 15.35, The Natural Philosopher wrote:
>>>>> On 14/04/2020 14:00, Carlos E.R. wrote:
>>>>>> On 14/04/2020 07.10, Charlie Gibbs wrote:
>>>>>>> I find CUPS to be nice when it works, but frustrating when it
>>>>>>> doesn't - which happens often.  I've tracked it down to the
>>>>>>> fact that CUPS accesses my printer by its IP address - which
>>>>>>> changes from time to time when the printer is powered off or
>>>>>>> when its DHCP lease expires.  In the CUPS web-based interface
>>>>>>> (http://localhost:631), the "Printers" maintenance screen
>>>>>>> currently shows:
>>>>>>>
>>>>>>> Connection: lpd//192.168.0.41:515/PASSTHRU
>>>>>>>
>>>>>>> My printer, on the other hand, is showing an IP address of
>>>>>>> 192.168.0.45, so any attempts to print will fail.  If I delete
>>>>>>> and re-add the printer, CUPS will find the new IP address and
>>>>>>> all will be well - until the printer's IP address changes again.
>>>>>>>
>>>>>>> Is there a way to get CUPS to access the printer by its name
>>>>>>> (EPSONxxxxxx) rather than its IP address?
>>>>>>
>>>>>> Can you ping that name? My guess is "no". Then, of course CUPS 
>>>>>> can't find the printer by name.
>>>>>>
>>>>>> The usual solution is simply to assign a fixed IP to the printer. 
>>>>>> There are two basic methods: write the address in the printer own 
>>>>>> configuration panel or web page, or fixate the address in the 
>>>>>> router via DHCP.
>>>>>>
>>>>>> Another would be some kind of DNS setup that updates automatically.
>>>>>>
>>>>> Bonjour...
>>>>
>>>> Doesn't seem to work.
>>>>
>>>> Isengard:~ # lpinfo --include-schemes dnssd -v
>>>> Isengard:~ #
>>>>
>>>>
>>> ah. that foxes me. I THOUGHT that was how MAC OSX did it. I really did.
>>> And Mac OSX uses CUPS.
>>>
>>> Ah. OS/X uses Air Print so the printer may be running THAT but not 
>>> bonjour.
>>>
>>>
>>>
>>>> I was rather thinking of an actual DNS setup that gets the name 
>>>> "somehow" and sets it up.
>>>>
>>> I think that is sort of how the bonjour/ air print works.,
>>>
>>> I enabled both on my printer by using the printers web interface to 
>>> enable it and...
>>>
>>> lpinfo --include-schemes dnssd -v
>>> network 
>>> dnssd://HP%20Color%20LaserJet%20Pro%20M252n%20(F63AC8)._pdl-datastream._tcp.local/ 
>>>
>>>
>>> It showed a blank before.
>>>
>>> This web page may be useful:
>>>
>>> https://wiki.debian.org/CUPSDriverlessPrinting
>>>
>>>
>>>
>>>
>>>
>>>> Routers are in the best position to do this, but mine doesn't.
>>>>
>>>
>>> No, routers are not really. The bonjour was designed for this really. 
>>> IF you can turn it on on te printer it SHOULD solve your problem the 
>>> 'official' and rather modern way and has the advantage (???) that any 
>>> mobile device  that connects to your network should also find the 
>>> printer and be able to use it.
>>
>> I'm not talking of bonjour at all.
>>
> But I am.

And I am not.

> 
>> Just the router giving an IP to machines via DHCP, and finding their 
>> names (probably their windows names). I see my router finding 
>> "android" hosts. It can use rules to assign names on the DNS server 
>> that runs on the router.
>>
> 
> Bonjour is the printer giving its IP address to the client with no 
> involvement of the router at all.

Mine, an HP, doesn't.

> 
>> It is easy to assign an IP to a printer on the DHCP server at the 
>> router. It should be trivial to also assign a name in the same config 
>> page.
>>
> No
> It is even easier to enable bonjour on the printer at which point the 
> printer should just appear in CUPS., At least that how it works here now 
> that I have enabled it.

And it doesn't here.

> 
>  > It should be trivial to also assign a name in the same config page.
> No. Routers do not assign names

They should. They do DNS.

-- 
Cheers, Carlos.

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Thread

CUPS - set up printer by name instead of IP address Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-04-14 05:10 +0000
  Re: CUPS - set up printer by name instead of IP address Bob Tennent <BobT@tennent.ca> - 2020-04-14 11:18 +0000
    Re: CUPS - set up printer by name instead of IP address The Natural Philosopher <tnp@invalid.invalid> - 2020-04-14 13:04 +0100
  Re: CUPS - set up printer by name instead of IP address The Natural Philosopher <tnp@invalid.invalid> - 2020-04-14 13:00 +0100
  Re: CUPS - set up printer by name instead of IP address Andreas Kohlbach <ank@spamfence.net> - 2020-04-14 08:36 -0400
    Re: CUPS - set up printer by name instead of IP address The Natural Philosopher <tnp@invalid.invalid> - 2020-04-14 14:03 +0100
      Re: CUPS - set up printer by name instead of IP address Andreas Kohlbach <ank@spamfence.net> - 2020-04-14 13:30 -0400
  Re: CUPS - set up printer by name instead of IP address "Carlos E.R." <robin_listas@es.invalid> - 2020-04-14 15:00 +0200
    Re: CUPS - set up printer by name instead of IP address The Natural Philosopher <tnp@invalid.invalid> - 2020-04-14 14:35 +0100
      Re: CUPS - set up printer by name instead of IP address "Carlos E.R." <robin_listas@es.invalid> - 2020-04-14 16:10 +0200
        Re: CUPS - set up printer by name instead of IP address The Natural Philosopher <tnp@invalid.invalid> - 2020-04-14 18:46 +0100
          Re: CUPS - set up printer by name instead of IP address "Carlos E.R." <robin_listas@es.invalid> - 2020-04-15 12:45 +0200
            Re: CUPS - set up printer by name instead of IP address The Natural Philosopher <tnp@invalid.invalid> - 2020-04-15 11:58 +0100
              Re: CUPS - set up printer by name instead of IP address "Carlos E.R." <robin_listas@es.invalid> - 2020-04-16 12:53 +0200
                Re: CUPS - set up printer by name instead of IP address The Natural Philosopher <tnp@invalid.invalid> - 2020-04-16 13:03 +0100
                Re: CUPS - set up printer by name instead of IP address "Carlos E.R." <robin_listas@es.invalid> - 2020-04-16 22:50 +0200
                Re: CUPS - set up printer by name instead of IP address "Anonymous Remailer (austria)" <mixmaster@remailer.privacy.at> - 2020-04-17 01:45 +0200
                Re: CUPS - set up printer by name instead of IP address "Carlos E.R." <robin_listas@es.invalid> - 2020-04-17 04:19 +0200
            Re: CUPS - set up printer by name instead of IP address Rich <rich@example.invalid> - 2020-04-15 14:35 +0000
              Re: CUPS - set up printer by name instead of IP address Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-04-15 17:14 +0000
                Re: CUPS - set up printer by name instead of IP address Bit Twister <BitTwister@mouse-potato.com> - 2020-04-15 12:31 -0500
              Re: CUPS - set up printer by name instead of IP address "Carlos E.R." <robin_listas@es.invalid> - 2020-04-16 12:54 +0200
    Re: CUPS - set up printer by name instead of IP address "Rinaldi J. Montessi" <rinaldi@notaserver.com> - 2020-04-14 10:21 -0500
    Re: CUPS - set up printer by name instead of IP address Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-04-14 16:03 +0000
      Re: CUPS - set up printer by name instead of IP address The Natural Philosopher <tnp@invalid.invalid> - 2020-04-14 18:47 +0100
      Re: CUPS - set up printer by name instead of IP address "Carlos E.R." <robin_listas@es.invalid> - 2020-04-16 13:00 +0200

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