[cups] Accessing a parallel printer from a remote network

[Michael Sweet]

Phil,

You need to configure the list of host names that might be used by the computer sharing the parallel printer by adding ServerAlias lines to your cupsd.conf file, or disable Host: header validation (which exposes you to DNS rebinding attacks...) with the following command:

    cupsctl 'ServerAlias=*'


> On Jul 17, 2015, at 8:18 AM, Phil Reynolds <phil-cups at tinsleyviaduct.com> wrote:
> 
> I have an HP LaserJet 6P, working very well within my local network,
> but I may sometimes want to print to it from my laptop which is
> sometimes on a mobile connection (fixed IP which makes things a bit
> easier).
> 
> On Debian jessie, cups 1.7.5 is installed (the only OS I am currently
> using on physical machines). One way I thought of was to use IPP, but
> whenever I try the URL provided by ipp --ls, I find that my laptop
> cannot get the printer status, even on the home network where it can
> see the shared printer (dnssd/Bonjour is working on the internal
> network).
> 
> The server logs errors like these when I try to use the printer via IPP:
> 
> E [17/Jul/2015:12:47:39 +0100] [Client 17] Request from
> "[v1.<IPv6-ADDRESS-REDACTED>]" using invalid Host: field
> "<FQDN-REDACTED>:631"
> 
> Is there any way I can access the printer using Bonjour off the network
> (cups-browsed configuration)? Failing that, why am I finding IPP
> unusable?
> 
> -- 
> Phil Reynolds
> mail: phil-cups at tinsleyviaduct.com
> Web: http://phil.tinsleyviaduct.com/
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_________________________________________________________
Michael Sweet, Senior Printing System Engineer, PWG Chair