[SURBL-Discuss] RE: Start an IP list to block?

[Patrik Nilsson]

At 17:23 2004-09-09 -0400, Chris Santerre wrote:
> >-----Original Message-----
> >From: Matt Kettler [mailto:mkettler at evi-inc.com]
> >Chris, SA 3.0 appears to already support checking DNS
> >blacklisting of URLs
> >based on resolved IP.

That's actually resolved IPs of the hostnames for the *name servers* for 
the domain in the uri, not the resolved IPs for the actual host names in 
the URI:

> >and from URIDNSBL.pm:
> >
> >         This works by analysing message text and HTML for URLs, 
> extracting the
> >         domain names from those, querying their NS records in DNS, 
> resolving
> >         the hostnames used therein, and querying various DNS blocklists for

"used therein" refers to the NS records.

Patrik