How to manage PING replies?

Question

How can I manage, for example, my Ubuntu mashine so it doesn't (or does) respond to PING(ICMP ECHO_REQUEST - type 8) requests?

Normally almost all computers in a LAN network responds to ping with an ICMP ECHO_REPLY, but how to turn it off?

How to Manage it? How to manage other types ICMP request?

Please explain your downvotes – Jonathan Gurebo Apr 15 '14 at 14:37 — Jonathan Gurebo, Apr 15 '14 at 14:37

score 1 · Answer 1 · answered Apr 15 '14 at 14:08

1

/proc/sys/net/ipv4/icmp_echo_ignore_all set to a non zero number will not respond to IPv4 pings, IPv6 doesn't seem to have the same amount of options.

Other options and values can be found here

answered Apr 15 '14 at 14:08

NickW

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score 0 · Answer 2 · answered Apr 15 '14 at 15:20

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For example iptables -A INPUT -p icmp --icmp-type echo-request -j DROP. Same with other types...

answered Apr 15 '14 at 15:20

Tomyk

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How to manage PING replies?

2 Answers2