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

[Kent West <westk@acu.edu>]

On 11/17/19 3:02 AM, Anthony DeRobertis wrote:
> Quick search of 
> https://sources.debian.org/src/cups/2.3.0-7/backend/ipp.c/ shows there 
> is no different between ipp and http, and no difference between ipps 
> and https.
>
> ipps and https force encryption, using SSL/TLS (just like you'd expect 
> from https) (so if your printer doesn't offer encryption, say due to 
> no certificates, it'll fail).
>
> ipp and http do not require encryption (but may use it anyway, if 
> available, via a TLS upgrade).
>
> Probably CUPS offers both because some printers' documentation gives 
> http:// URLs and some give ipp:// URLs.

Thank you! Good information!


--

Kent