[exim] rogue connections to broadcast addresses

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Autor: Leonardo Boselli
Data:  
Para: exim-users
Asunto: [exim] rogue connections to broadcast addresses
I got a lot of activity sending e-mail (bounce errors) to
allmarts.com matmail.com and arthlink.net .
These two domains have an MX pointing to 192.168.255.255
that is not very legal, also becouse it is the broadcast address of a
reserved subnet ...
being such address packets leave the server, but connection never
come back. This locks the server with a lot of open conenctions, with
the results that often squid ends working having no free ports.
Is there a way to avoid this problem, other than asking the dns
maintainer for these domains to correct
[ideally: how to let exim ignore and drop domain pointing to a reserved
address , without even tryyng to pass forward ??


--
Leonardo Boselli
Nucleo Informatico e Telematico del Dipartimento Ingegneria Civile
Universita` di Firenze , V. S. Marta 3 - I-50139 Firenze
tel +39 0554796431 cell +39 3488605348 fax +39 055495333
http://www.dicea.unifi.it/~leo