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Special Forums IP Networking How can I disable ping replies?
# 1  
Old 11-10-2009
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?
# 2  
Old 11-11-2009
Debian

you can use:
Code:
iptables -A OUTPUT -p icmp --icmp-type 8 -j DROP

you can also try this (I never used personally):
Code:
echo "1" > /proc/sys/net/ipv4/icmp_echo_ignore_all

OR do it permanently on sysctl.conf
Code:
vi /etc/sysctl.conf
net.ipv4.icmp_echo_ignore_all = 1

hope this helps
# 3  
Old 11-11-2009
Sweet. Thanks!
# 4  
Old 12-20-2009
Quote:
Originally Posted by sysrenan
you can use:
Code:
iptables -A OUTPUT -p icmp --icmp-type 8 -j DROP

you can also try this (I never used personally):
Code:
echo "1" > /proc/sys/net/ipv4/icmp_echo_ignore_all

OR do it permanently on sysctl.conf
Code:
vi /etc/sysctl.conf
net.ipv4.icmp_echo_ignore_all = 1

hope this helps
Code:
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):
Code:
iptables -A OUTPUT -p icmp --icmp-type 0 -j DROP

Smilie

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