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Linux server shutdown/enable ICMP protocol (ping)

Source: Internet
Author: User
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Often encounter some problems is that the host is clearly online but the ping does not work, the other party may have opened the Forbidden Ping mode
Sometimes for security concerns, we need to disable ping for our Linux servers.



Turn off ICMP protocol (ping-forbidden)

echo "1" >/proc/sys/net/ipv4/icmp_echo_ignore_all

Cat/proc/sys/net/ipv4/icmp_echo_ignore_all



Open ICMP Protocol (disable ping)

echo "0" >/proc/sys/net/ipv4/icmp_echo_ignore_all

Cat/proc/sys/net/ipv4/icmp_echo_ignore_all

Linux server shutdown/enable ICMP protocol (ping)

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Related Keywords:
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