Re: [Exim] SMTP banner

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Szerző: Derek Broughton
Dátum:  
Címzett: exim-users
Tárgy: Re: [Exim] SMTP banner
Peter Radcliffe wrote:

> Philip Hazel <ph10@???> probably said:
>
>>Does anybody have any strong feelings about what the default banner
>>should be? (Any one site can of course change it, by setting
>>"smtp_banner".) It does seem silly to output the compile number and
>>date/time, now I come to think about it. Do any of these find favour?
>>
>>smtp_banner = Exim ready
>>smtp_banner = Exim ESMTP server ready
>>smtp_banner = ESMTP server ready
>>smtp_banner = OK
>>smtp_banner = ESMTP session initiated
>>
>>Or something else?
>>
>
> I'd vote for;
>
> smtp_banner = $primary_hostname ESMTP $tod_full
>


I think you need to, at least, allow for $primary_hostname to be
omitted. I'm not a fan of security by obscurity either, but I have
worked at a number of places (a bank comes to mind) where policy states
that no identifying information can be displayed in a welcome message
(in fact for dialup logins, you don't even GET a welcome message, you
have to know what to type in a blank screen). In such a case, you'd
need to drop the hostname just to please the bean counters.

derek