Hutch: New page: == Overview == Although not a foolproof method, one way to determine if an IP address is dynamic is to look it up in the [http://www.au.sorbs.net/faq/dul.shtml SORBS Dynamic User List and...

Hutch — Fri, 08 Aug 2008 20:15:01 GMT

New page: == Overview == Although not a foolproof method, one way to determine if an IP address is dynamic is to look it up in the [http://www.au.sorbs.net/faq/dul.shtml SORBS Dynamic User List and...

New page

== Overview ==

Although not a foolproof method, one way to determine if an IP address is dynamic is to look it up in the [http://www.au.sorbs.net/faq/dul.shtml SORBS Dynamic User List and Host List (DUHL)]. The DUHL contains most netblocks of dynamically-assigned addresses by ISPs.

== Example ==

As an example, I'll determine if 24.245.33.165 is a dynamic IP by looking it up in the SORBS DUHL.

* ''dig'' method:
$ '''dig +short 165.33.245.24.dul.dnsbl.sorbs.net'''
127.0.0.10

* ''nslookup'' method:
nslookup 165.33.245.24.dul.dnsbl.sorbs.netNon-authoritative answer:
Name: 165.33.245.24.dul.dnsbl.sorbs.net
Address: 127.0.0.10

A result of 127.0.0.10 indicates it is in the SORBS DUHL list.

How can I tell if an IP address is dynamic? - Revision history

Hutch: New page: == Overview == Although not a foolproof method, one way to determine if an IP address is dynamic is to look it up in the [http://www.au.sorbs.net/faq/dul.shtml SORBS Dynamic User List and...