Re: find_services* error in finding smtp

Hi,

sorry, about the CRLF in my first post.... it is just the other way round, smtp 
servers should (but rarely do) reject LF-only new-lines.

but the problem to identify certain smtp servers - or at least exim - persists.

> to my amazement nessus cannot identify an (my) smtp server anymore 
> (which otherwise runs fine). It reports an unknown service on port 25.
>
> I watched the smtp's log (exim) and had repeatedly lines in it starting 
> with:
>
> SMTP protocol violation: synchronization error (next input sent too 
> soon): rejected "HELO example.com" H=[...]
>
> same lines with "EHLO there" "GET / ..." a.s.o. as if (my interpretation 
> without checking any code) find_services is faulty in that it sends too 
> many lines without waiting for replies or sending CRLF as NL instead of 
> LF only, which is in breach with RFCs and therefor rejected by 
> "well-behaved" smtps. sendmail and most other smtps swallows these lines 
> afaik.
>
> hope this helps finding a bug

Mit freundlichen Grüßen / regards
Hartmut Steffin 
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