Darn! I know I just read something about this YESTERDAY but I can't
find it.
It seems like you should be able to do it with firewalling rules,
though...
Mullen, Patrick wrote:
>
> I was thinking of writing a program which trapped ping requests,
> prompted the user (who would have to have superuser privs, of
> course) if they want to allow pings from the requesting host,
> and then respond if allowed and add the host to the "allowed
> hosts" list for future reference.
>
> Has this been done before?
>
> What is the best way to do this? IINM, ping replies are
> handled by the kernel. Is there a way to keep the kernel from
> getting ping requests?
>
> What is the best way of forwarding requests along to the normal
> handler if we decide to let it through?
>
> Will this require a kernel change, or can I do this all in userspace?
>
> Thanks!
>
> ~Patrick
