Re: Essential ICMP

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On Friday 18 February 2005 00:30, Dean Anderson wrote:
> No, that would be wildly wrong.
>
> Necessary messages: (never block)
>  3 Destination Unreachable
>   (block code 4 and break PATH MTU)
>   (other codes are "Nice")

Oh nice tip :)

It made me revisit my firewall script, and I found this:

$IPTABLES -A icmp_packets -p ICMP --icmp-type 11 -j ACCEPT #dest unreach

So I had the right idea to permit dest-unreach.. just had the wrong 
type-number.. thanks for the memory jog!

Cheers,
Gavin.


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