Re: Disable ICMP echo (ping) responses in Linux

Guest — Thu, 16 Dec 2004 20:55:21 -0000

thanks for the tip! complete newbie to Linux but managed to get 100% stealth enabled in the firewall....
using your tips page.. only had to disable ping to achieve it! thanx again! :P

Re: Disable ICMP echo (ping) responses in Linux

Anonymous — Wed, 04 Aug 2004 19:01:21 -0000

But that would stop pings altogether. If you have a monitoring service, this would hurt you. You would never know if your server went down.

I would suggest installing APF fire wall, then do this:
pico -w /etc/apf/conf.apf

Change this:
IG_ICMP_TYPES="3,5,11,0,30,8"

To this:
IG_ICMP_TYPES="3,5,11,0,30"

So, if you have a monitoring service, add the monitor's IP to the alallow_hosts.rules file.

THEN:
service apf restart

That would block pings from all outside sources except the IP's you explicitly allow.

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Re: Disable ICMP echo (ping) responses in Linux

Re: Disable ICMP echo (ping) responses in Linux