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What is ICMP broadcast good for?
Fresh5 days ago
Mar 15, 202619957 viewsConfidence Score0%
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Problem
To configure Linux to ignore ICMP broadcasts (to protect from SMURF attacks), I have added the following line to : Anyone knows what are the drawbacks of ignoring ICMP broadcasts? In other words what is ICMP broadcasting good for?
Error Output
net.ipv4.icmp_echo_ignore_broadcasts = 1
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Fix for: What is ICMP broadcast good for?
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The option you referenced, , only deals with IPv4 ICMP echo broadcasts. ICMP echo messages are the messages used by the "ping" command-line tool. By ignoring broadcast ICMP echo requests, your machine won't respond when someone tries to ping a broad…
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