Mailinglist Archive: opensuse-security (564 mails)

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Re: [suse-security] ICMP filter in SuSEfirewall? (again)
  • From: dprocc <dproc@xxxxxxx>
  • Date: Tue, 23 Jan 2001 20:39:50 -0500
  • Message-id: <20010123203950.C12404@xxxxxxxxxxxxxxx>
On Tue, 23 Jan 2001, Rick Green wrote:

>
> Can someone point me to the RFC that defines all the ICMP sub-types?
>

Are these the definitions you mean?
#define ICMP_ECHOREPLY 0 /* Echo Reply */
#define ICMP_DEST_UNREACH 3 /* Destination Unreachable */
#define ICMP_SOURCE_QUENCH 4 /* Source Quench */
#define ICMP_REDIRECT 5 /* Redirect (change route) */
#define ICMP_ECHO 8 /* Echo Request */

and so forth

I took this from the kernel source tree in:
/usr/data/src/linux-2.2.13.SuSE/include/net/icmp.h

I just posted a similar question about these DENYs to the
list, so sorry about the duplication. I am very interested
to hear what the Destination Unreachable packets do for the
ISP and for attackers.

dproc


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