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‎01-12-2018 03:11 AM

HP Recommended
Product: HP LaserJet Pro 400 color MFP M475
Operating System: macOS 10.12 Sierra

I didn't find this information elsewhere so I thought I would post it here if someone else experience the same issue.

 

It seems HP Easy Start (macOS) can't connect to a printer over WiFi where HTTPS Enforcement has been enabled under "Networking" > "HTTPS Enforcement" > "Always use HTTPS when connecting to the printer's embedded Web server." in the printer's web interface.

 

The symptom when using HP Easy Start to setup a printer over is that "Gathering device information…" takes a long time and then fails with  "Unable to communicate with device". From the log it seems that the app doesn't follow the HTTP to HTTPS redirect:

 

2018-1-12 10:43:17 GMT 1.0 <Info>: [LKLEDMSession] - start printer resolving
2018-1-12 10:43:17 GMT 1.0 <Info>: [LKNetServicePrinterURLResolver] - Got URLs: (
    "http://NPI06A903.local./",
    "http://10.0.0.104/"
) for HP LaserJet 400 colorMFP M475dw (06A903)
2018-1-12 10:43:37 GMT 1.0 <Info>: [LKURLConnectionConsumer] - Connection timer did fire
2018-1-12 10:43:59 GMT 1.0 <Info>: [LKURLConnectionConsumer] - Connection timer did fire
2018-1-12 10:44:21 GMT 1.0 <Info>: [LKURLConnectionConsumer] - Connection timer did fire
2018-1-12 10:44:21 GMT 1.0 <Error>: [LKLEDMAccessOperation] - request completed with error: NSURLErrorDomain:-1001
2018-1-12 10:44:41 GMT 1.0 <Info>: [LKURLConnectionConsumer] - Connection timer did fire
2018-1-12 10:45:3 GMT 1.0 <Info>: [LKURLConnectionConsumer] - Connection timer did fire
2018-1-12 10:45:25 GMT 1.0 <Info>: [LKURLConnectionConsumer] - Connection timer did fire
2018-1-12 10:45:25 GMT 1.0 <Error>: [LKLEDMAccessOperation] - request completed with error: NSURLErrorDomain:-1001
2018-1-12 10:45:25 GMT 1.0 <Warning>: [LKPrinterResolvingOperation] - Printer resolving failed (LEDM Not supported)

The workaround is to disable "HTTPS Enforcement".

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