Re: local IP collision with remote IP

[Pascal Hambourg <pascal.mail@xxxxxxxxxxxxxxx>]

Hello,

Joe Buehler a écrit :
> 
> I am having issues when the IP address on one of the interfaces
> collides with an IP address I want to talk to on another interface,
> however.  What I see is that the TCP SYN gets an immediate RST back.
> The frame is never leaving the box so I presume there is some sort of
> local routing issue.
> 
> Am I having issues because of the "local" routing table?

Yes.

> The output
> of "ip rule list" makes me think that the local table has priority
> over my source-route tables:

Yes.

> If I want to talk to 10.10.10.10 using the 10.10.10.20 interface, is
> my issue that the kernel is seeing 10.10.10.10 in the local table and
> never going any further?

Yes. The IP protocol assumes address uniqueness. The same address may be
assigned to multiple interfaces on the same host, but not to multiple hosts.

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