On Mon, 2006-02-27 at 01:39 +0900, SEKINE tatz Tatsuo wrote:
> Hi all, I have a question about the example of "Configurable
> Source Address for ICMP Errors" in
> http://fedoraproject.org/wiki/Docs/Beats/Networking
>
> <quote>
> For example, the kernel receives an ICMP echo request on the interface eth0.
> Because the new sysctl option is enabled, this causes the ICMP echo reply to
> be sent out via eth1. The address of eth0 is used when the default behavior
> would use the address of eth1.
> </quote>
>
> First of all, this new sysctl key refers ICMP *Error* messge.
> It differs from ICMP Echo Reply. So, we are supposed to think
> about the case that something error happens.
>
> There is another point to be discussed. IMHO, former kernel
> also uses eth1 interface to sent out the reply (as an error)
> message in this case. The changed point caused by this new
> feature is just IP address used in the reply packet. Kernel
> routing shceme is unchanged in these new kernel releases.
>
> My suggestion is:
> For example, the kernel receives a packet on the interface
> eth0 which cause ICMP Error and replies the ICMP Error
> messages via eth1 interface because of its routing table.
> If the the new sysctl option is enabled, the address of eth0
> is used for the source address of the ICMP Error while the
> default behavior would use the address of eth1.
Tatsuo:
Thank you for the suggestion. I didn't like the way this was worded
either, but wasn't sure how to change it because I wasn't familiar with
the subject matter. I didn't want my change to inadvertently alter the
*meaning* of the note. In the future, if you find any more problems
like this, please file a bug in Bugzilla under product: Fedora
Documentation, component: release-notes. Thanks again for your help,
I'll change the notes appropriately.
--
Paul W. Frields, RHCE http://paul.frields.org/
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Fedora Documentation Project: http://fedora.redhat.com/projects/docs/
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