Csf firewall to effectively prevent the use of small-scale DDOS

Csf test is working properly

Update:upgrade Ubuntu 20.04 LTS Rear,csf is not working,Prompt that iptables cannot be found:

This is because Ubuntu 20.04 LTS Changed iptables Related command position,The csf script is not updated in time。[……]

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Avoid input candidate article hidden behind other windows

When developing pocketed macOS version of the input method,I encountered such a problem,That is the window priority issues。Before How to make NSWindow displayed in a different Space or the Screen This article I referred to himself realizes candidate field pocketed input method,In fact, with a NSWindow

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