Viktor Dukhovni <viktor1dane@???> (Di 08 Apr 2014 20:57:43 CEST):
…
> - Do use getnameinfo() instead of gethostbyaddr() to perform address to
> name lookups. I would not recomment using DNS directly as this breaks
> systems that rely in part on /etc/hosts or other local nsswitch
> mechanisms.
+1
> Under the covers, if the address is on the public Internet, and
> requires DNS lookups for resolution, if the local resolver is
> configured to do DNSSEC, it will be validated. There is like at
> this time no reason for Exim to explicitly distinguish DNSSEC
> validated IP addresses from those that were obtained from unsigned
> zones. Therefore, if the goal is to simply filter out forgeries, the
> nameserver will already discard "bogus" results.
But does the client application have a way to tell if the getnameinfo()
result is validated? Or failed because of a failed validation?
Viele Grüße aus Dresden
Heiko
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