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Primary and Secondary DNS changed by itself - HP MFP M577

HP Color LaserJet MFP M577

Hello Team, 


Scanning function was not working on (HP Color LaserJet MFP M577) which is connected to LAN network in our company. Also, printing was working fine. However, there was no error when trying to scan. 


So, I have checked all scanning and network setting  and the issue was on the section for DNS, under Primary (IPv4) was, under Secondary (IPv4) was which are not the correct settings that we have applied on the printer.


My question is how will the Primary and Secondary DNS changed by itself? is there any setting needs to apply to disable an option to avoid this occur again?


The issue has been solved by changeing the value of DNS manually


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