Cannot connect to Embedded Web Server (EWS)

[Dmitriy3]

Good day!  On our printer the USB flash drive (internal disk) broke . After change, i can not connect to EWS.  What could be the problem?

[John_Getzke]

A USB port or drive breaking is a physical issue.

The EWS not being available is likely a network misconfiguration or a firmware problem.

To verify the printer is connected to the network correctly print off a configuration report from the printer.  There will be an IPv4 address listed somewhere in teh networking area.  Use a PC and navigate to the IP Address posted in the report from a web browser.

If the IP you were using and the IP from the report do not match then reinstall using the IP from the report.

[turboscrew]

And if the IPs don't match, check that your printer has a static IP.

[Dmitriy3]

Sorry, i  Provided incorrect data. Not USB flash drive was broke, eMMC drive was broke (eMMC move to read only mode) and printer  load with error 99.39.73.  Service centre change the eMMC drive and upload last firmware (2308974_579762). But iam afraid something going wrong. Printer printing good. IP address (from configuration page)pings normal. But can't go in EWS. Re firmware do not solve problem. 

[turboscrew]

nmap -T4 -A -v <your printer's IP>

might reveal something.

[Dmitriy3]

Turboscrew thank's for help. I'm one step closer to solving the problem.

part nmap from problem printer :

Scanning ******.*****.** (192.168.2.32) [1000 ports]
Discovered open port 515/tcp on 192.168.2.32
Discovered open port 9100/tcp on 192.168.2.32
Completed SYN Stealth Scan at 11:50, 5.17s elapsed (1000 total ports)

............

PORT STATE SERVICE VERSION
515/tcp open printer
9100/tcp open jetdirect?

and from good work EWS printer:

Scanning ********.******.** (192.168.2.47) [1000 ports]
Discovered open port 443/tcp on 192.168.2.47
Discovered open port 80/tcp on 192.168.2.47
Discovered open port 631/tcp on 192.168.2.47
Discovered open port 515/tcp on 192.168.2.47
Discovered open port 7627/tcp on 192.168.2.47
Discovered open port 9100/tcp on 192.168.2.47
Completed SYN Stealth Scan at 11:54, 5.27s elapsed (1000 total ports)

.............

PORT STATE SERVICE VERSION
80/tcp open http Virata-EmWeb 6.2.1
| http-methods:
|_ Supported Methods: GET HEAD POST
|_http-server-header: Virata-EmWeb/R6_2_1
|_http-title: Did not follow redirect to https://npic10be0.**********.***/
443/tcp open ssl/http HP LaserJet printer http admin
| http-cookie-flags:
| /:
| sessionId:
|_ httponly flag not set
| http-methods:
|_ Supported Methods: GET HEAD POST
| http-robots.txt: 1 disallowed entry
|_/
|_http-server-header: HP_Compact_Server
|_http-title: HP &raquo; Device Status
| ssl-cert: Subject: commonName=NPIC10BE0.**********.***/organizationName=HP
| Issuer: commonName=NPIC10BE0.**********.***/organizationName=HP
| Public Key type: rsa
| Public Key bits: 2048
| Signature Algorithm: sha256WithRSAEncryption
| Not valid before: 2016-11-25T20:08:44
| Not valid after: 2021-11-24T20:08:44
| MD5: 30c0 e2e8 aac6 fa9f 7a81 6fa1 f2c2 2231
|_SHA-1: 32ad 54f4 d082 f597 f0aa b6f3 f3dd ebf3 d067 9eb7
|_ssl-date: 1970-01-05T23:31:11+00:00; -48y241d09h23m36s from scanner time.
515/tcp open printer
631/tcp open http Virata-EmWeb 6.2.1
| http-methods:
|_ Supported Methods: GET HEAD POST
|_http-server-header: Virata-EmWeb/R6_2_1
|_http-title: Did not follow redirect to https://npic10be0.**********.***/
7627/tcp open ssl/http HP LaserJet printer http admin
|_http-favicon: Unknown favicon MD5: 5283516ECA6A053EE16A48D014E127A8
| http-methods:
|_ Supported Methods: GET HEAD POST
|_http-server-header: HP_Compact_Server
|_http-title: Site doesn't have a title (text/html).
| ssl-cert: Subject: commonName=NPIC10BE0.**********.***/organizationName=HP
| Issuer: commonName=NPIC10BE0.**********.***/organizationName=HP
| Public Key type: rsa
| Public Key bits: 2048
| Signature Algorithm: sha256WithRSAEncryption
| Not valid before: 2016-11-25T20:08:44
| Not valid after: 2021-11-24T20:08:44
| MD5: 30c0 e2e8 aac6 fa9f 7a81 6fa1 f2c2 2231
|_SHA-1: 32ad 54f4 d082 f597 f0aa b6f3 f3dd ebf3 d067 9eb7
|_ssl-date: 1970-01-05T23:31:13+00:00; -48y241d09h23m36s from scanner time.
9100/tcp open jetdirect?

How can i open ports 80 and 443 and may be 631 and 7627 from printer control panel? Or EWS server should be installed with a separate firmware?

[John_Getzke]

> How can i open ports 80 and 443 and may be 631 and 7627 from printer control panel? Or EWS server should be installed with a separate firmware?

Talk to your network administrator.  Port 80 is HTTP and port 443 is HTTPS. Both are the most frequently used ports for internet communication via web browsers.  Its likely your network admins have disabled these protocols for you on the network segments or ports where the printers are installed.

You do not open/close ports on the client devices.  Ports are controlled at the network level and need to be adjusted with your firewall or router hardware.

EWS is installed on all HP laserjet printers by default.  There is no seperate firmware upgrade to enable this feature.  I'd bet if you picked up the printer and moved it to a temporary network without any configuration it would work.

[turboscrew]

Probably ports 80 and 443 are the EWS ports, and also 631 may work - it's usually used by CUPS (printing system used in Linux). In my printer EWS works in all ports where nmap finds SOAP service.

I think, port 515 is where the print jobs are sent.

For Linux there is HPLIP that contains some tools too, like hp-makeuri, hp-check and hp-probe.

[turboscrew]

And maybe, just maybe, this migt be helpful too...

https://www8.hp.com/us/en/solutions/business-solutions/printingsolutions/wja.html

(At least to me it offers free download at the end of the page.)

[Dmitriy3]

Problem solved! I am format printer disk from system boot menu and upload firmware via remote admin (telnet) and all work, just upload firmware not help. Suspect in service center do not upload firmware and just moved eMMC disk from another printer becouse in configuration page appear  "HP LJ M604", but I wasn't paying attention. Now on configuration page i see "HP LJ M605". Thanks all for help.