Technical Summary.
Many sites connected to the Internet make use of IPv4 addresses
which are not globally unique. Examples are the addresses designated
in RFC1918 for private use within individual sites.
Since queries sent to AS112 servers are usually not intentional, the
replies received back from those servers are typically unexpected.
Unexpected inbound traffic can trigger alarms on intrusion detection
systems and firewalls, and operators of such systems often mistakenly
believe that they are being attacked.
This document provides background information and technical advice
to those firewall operators.
Working Group Summary
The working group was supportive of this and the associated AS112
operations document. Nothing particularly controversial came up.
Document Quality
This document is for end user consumption.
Personnel
Shepherd is Peter Koch.