Introduction: Understanding Seccomp
Seccomp is a Linux kernel feature that enables administrators to restrict the actions that a process can perform, thus providing an additional layer of security. It stands for “secure computing mode” and was first introduced in the 2.6.12 kernel. Seccomp is a powerful tool for enhancing the security of a Linux system, as it helps to mitigate the risks of exploitation from untrusted code and malware.
How Seccomp Works
Seccomp works by limiting the system calls that a process can make. It does this by providing a list of allowed system calls that a process can make, and any system call not on this list is blocked. This list is often referred to as a “filter.” Seccomp operates in two modes: strict mode and filter mode. In strict mode, all system calls except for a whitelist of explicitly allowed ones are blocked. In filter mode, only the system calls explicitly listed in the filter are allowed, with all others being blocked.
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