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# 1  
Old 10-09-2008
Ping ICMP
Hi All,


How to disable ICMP time stamp request and time stamp reply of a machine?

How to test this feature from remote machine?

Please reply back

Vasanth
# 2  
Old 10-09-2008
What OS?

Linux:
Add this to /etc/sysctl.conf --
Code:
net.ipv4.icmp_echo_ignore_broadcasts = 1
net.ipv4.icmp_echo_ignore_all = 1

run the following command:
Code:
sysctl -p

I put the linux answer in here because this question is tough to find the answer to if you are just trying to google for
icmp disable. It may or may not help the OP.
Last edited by jim mcnamara; 10-09-2008 at 11:47 AM..
# 3  
Old 10-09-2008
jim
thanks for your kind reply
OS-->linux
and I want to supress only ICMP message 13 and 14 , other message type should not be affected.

1) Mean while browsing in net i found the below line should be added in IP table

iptables -A OUTPUT -p icmp --icmp-type 13 -j DROP

is the above mentioned correct or , do i need to do something

2) How do i test my PC drops ICMP message type 13 from remote machine?

thanks
waiting for your feedback

Vasanth
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