From the course: Linux: Firewalls and SELinux

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ShieldsUP! panic mode

ShieldsUP! panic mode - Linux Tutorial

From the course: Linux: Firewalls and SELinux

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ShieldsUP! panic mode

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- [Instructor] There comes a time in every system administrator's life when the panic starts and you want to make the order for shields to be put up on full. If you are absolutely certain by watching network traffic that you have a system that is under attack and you don't know why and you need time to figure it out, clearly there is always the option of pulling the Ethernet cable out of the back of the system. But we don't always have that access. Sometimes our systems are virtualized. Sometimes, frequently in fact, they're in data centers. Sometimes we don't have the ability to get to that physical Ethernet cable. So we introduced panic mode. Firewalld comes with a panic mode that will absolutely stop all network traffic in the case of an emergency. So I want to tell you what that was and tell you how to enable it. So we start with the firewall-cmd command, as we have before. And then what we're going to do is we're going to just do two dashes, write the word, panic, and then the…

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