All web servers should have a standard build, including standard web content; they should have NTP enabled; and they should not reveal any information relating to the specific web server, such as internal IP addresses or system names.
No devices should reveal error messages to the enduser since the device may leak its type and version, via either the error message or its HTTP headers. Some devices, such as load balancers and firewalls, will perform relatively simple intrusion prevention functions, possibly revealing their presence to an attacker performing various attacks.
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Read how to maintain and repair any desktop and laptop computer. This Ebook has articles with photos and videos that show detailed step by step pc repair and maintenance procedures. There are many links to online videos that explain how you can build, maintain, speed up, clean, and repair your computer yourself. Put the money that you were going to pay the PC Tech in your own pocket.