Piotr Sobolewski wrote:
> Hello,
>
> How can I make Linux (2.6 kernel) answer for ICMP Address mask request?
> Should I set something in /proc/sys/net?
>

AFAIK,

iptables -A INPUT -p icmp --icmp-type address-mask-request -j ACCEPT
iptables -A OUTPUT -p icmp --icmp-type address-mask-reply -j ACCEPT

cheers,
Eric