HTTP is used for communications over the network, such as when you access the machine via the Remote UI. If you are using a USB connection or are otherwise not using HTTP, you can disable HTTP to block malicious third-party intrusions via the unused HTTP port.
Disabling HTTP disables some of the network capabilities, such as the Remote UI, WSD printing, and printing with Google Cloud Print.
1
Press .
2
Use / to select <Network Settings>, and press .
If a screen for entering a PIN is displayed, enter the PIN with the numeric keys and press . Setting the System Manager PIN
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Portal Top
.
/
to select <Network Settings>, and press 
.
<Use HTTP>.
<Off>
<On>