Re: Blocking ping ?
From: Valdis Kletnieks (valdis.kletnieks@vt.edu)Date: 02/04/02
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From: Valdis Kletnieks <valdis.kletnieks@vt.edu> Date: 04 Feb 2002 15:38:47 -0500
Ashok Aiyar <aiyar@ebv.mimnet.northwestern.edu> writes:
> On 3 Feb 2002 03:18:17 GMT,
> Ashok Aiyar (aiyar@ebv.mimnet.northwestern.edu) wrote:
> > P.S. look at /usr/include/netinet/ip_icmp.h for a complete list
> > of all ICMP types and their descriptions.
>
> A better reference would be:
> http://www.iana.org/assignments/icmp-parameters
Actually, in this case, ip_icmp.h is probably a better reference.
icmp-parameters is *all* the registered parameters, most of which
are likely not supported in his kernel (for instance, the IANA
lists:
6 Alternate Host Address [JBP]
which you don't get in ip_icmp.h even if you *do* #define __USE_BSD (at
least not in my Linux 2.4 kernel..)
The files in /usr/include document what *your* system implements
(or at least they should)...
Having said that, the IANA list *is* something you should go and
read - if only so you understand what ICMP packets you *dont* support
but may encounter... ;)
-- Valdis Kletnieks Computer Systems Senior Engineer Virginia Tech
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