On Tuesday 22 April 2008 18:30, Sam Clippinger wrote:
> This feature would not alter any whitelist files. It would only save
> the IP addresses in memory long enough to process the message. The next
> incoming message would have to look up the IP addresses again.
Would djb's dnscache help in this instance? Personally I have found that
installing an internal dnscache speeds up RBL lookups hugely.
>
> -- Sam Clippinger
>
> Sergio Minini {NETKEY} wrote:
> > What would happen when the DynDNS changes? Would the IP still remain in
> > the whiteiplist?
> > If automatic de-listing is not possible, it would be useful to add a
> > comment (like: # mail.example.org DynDNS) to the IP listing, to make
> > manual editing easier.
> >
> > Just a thought.
> > Thanks- Sergio
> >
> >> -----Original Message-----
> >>
> >> This wouldn't be a right-hand whitelist exactly -- spamdyke already
> >> supports RHSWLs by checking the rDNS name against the list.
> >>
> >> Supporting DynDNS would require an extra step. It would
> >> function like
> >> an IP whitelist, except the IP addresses would be found by querying a
> >> list of FQDNs. For example, if this feature was used to whitelist
> >> "mail.example.dyndns.com", spamdyke would perform a DNS A record for
> >> "mail.example.dyndns.com". If that IP address was
> >> 11.22.33.44, spamdyke
> >> would add 11.22.33.44 to its IP whitelist. From that point
> >> on, spamdyke
> >> would behave as it does now.
> >>
> >> At least, that's my understanding of how DynDNS needs to be
> >> supported.
> >> It would increase the number of DNS queries, so it would have
> >> to be used
> >> sparingly.
> >>
> >> -- Sam Clippinger
> >
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>
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--
-----------------
Bob Hutchinson
Midwales dot com
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