Re: [exim] Sender Callout Verification on non-default NI

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Autor: Dan Shoop
Datum:  
To: Tony Finch
CC: exim-users
Betreff: Re: [exim] Sender Callout Verification on non-default NI
At 10:45 PM +0000 12/7/04, Tony Finch wrote:
>On Tue, 7 Dec 2004, Dan Shoop wrote:
>>
>> My "Duh!" moment occurred when there were no static routes. Here if I tried
>> using the "telnet> open -s 10.123.119.19 17.254.13.6 25" command w/o the
>> static route I got the same SYN_SENT behavior as I was seeing with
>>exim. This
>> is I presume the point you were trying to make.
>
>You give me more credit than is necessary - I was just after information
>that I would need to have a chance of working out what is going on.


Well just seeing the direction of questioning was telling.

>I think that you're suffering from the weak endpoint model, which assumes
>that all the interfaces on a host are equivalent from the point of view of
>routing. So (from this prespective) it makes perfect sense to send packets
>out of en1 with a source address that refers to en5, because en1 is how
>you get to the destination.


I'll take a look at this using tcpdump.

>When it comes to Exim and Telnet disagreeing, I wonder if this is to do
>with the route being configured after Exim has opened the connection. If
>so, it might be that the route is cached with the connection (this would
>depend on the version of Unix you are running).


I don't follow. FWIW, the OS is Darwin/Mac OS X.
--

-dhan

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Dan Shoop                                                   AIM: iWiring
Systems & Networks Architect                     http://www.iwiring.net/
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