How can I disable ping replies?

I want my system to not reply to pings. Does anybody know how to do that in any system?

you can use:

iptables -A OUTPUT -p icmp --icmp-type 8 -j DROP

you can also try this (I never used personally):

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

OR do it permanently on sysctl.conf

vi /etc/sysctl.conf
net.ipv4.icmp_echo_ignore_all = 1

hope this helps

Sweet. Thanks!

iptables -A OUTPUT -p icmp --icmp-type 8 -j DROP

Tried this but it didn't work, looked up the icmp types and codes, it should be 0 (Echo Reply):

iptables -A OUTPUT -p icmp --icmp-type 0 -j DROP

:slight_smile: