Why is --icmp-type required?

[Jeffrey W. Baker]

On Fri, 17 Nov 2000, Jeffrey W. Baker wrote:

> Hello again,
> 
> I have noticed that this rule doesn't work:
> 
> iptables -A INPUT -p icmp -j DROP
> 
> With the above rule, the machine still responds to ping requests.  This
> rule works:
> 
> iptables -A INPUT -p icmp --icmp-type echo-request -j DROP
> 
> So, is this a bug or is there really no way to specify all ICMP
> types? 

Ignore me.  I was accidentally pinging the alleged firewall machine from
*inside* my private network.

Sorry. -jwb