Monday, August 5, 2013

How To Block Pings ICMP

How To Block Pings ICMP

first, ping your server and make sure you are getting ping replies. i am using widows xp, so i will open the DOS terminal and ping my ip: example:

C:\Users\MyPC>ping 192.168.0.2

Pinging 192.168.0.2 with 32 bytes of data:
Reply from 192.168.0.2: bytes=32 time<1ms TTL=12
Reply from 192.168.0.2: bytes=32 time<1ms TTL=12
Reply from 192.168.0.2: bytes=32 time<1ms TTL=12
Reply from 192.168.0.2: bytes=32 time<1ms TTL=12

Ping statistics for 192.168.0.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
then send this command to edit sysctl.conf
SHELL COMMAND:
# Vim  /etc/sysctl.conf
net.ipv4.icmp_echo_ignore_all = 1

#/etc/init.d/network  restart

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