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Abstract-Newly announced IP addresses (from previously unused IP blocks) are often unreachable. It is common for network operators to filter out address space which is known to be unallocated ("bogon" addresses). However, as allocated address space changes over time, these bogons might become legitimately announced prefixes. Unfortunately, some ISPs still do not configure their bogon filters via lists published by the Regional Internet Registries (RIRs). Instead, they choose to manually configure filters. Therefore it would be desirable to test whether filters block legitimate address space before it is allocated to ISPs and/or end users. Previous work has presented a methodology that aims at detecting such wrongly configured filters, so that ISPs can be contacted and asked to update their filters. This paper extends the methodology by providing a more formal algorithm for finding such filters, and the paper quantitatively assesses the performance of this methodology.

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We present an application of the Redback network dynamics analysis tool to mobile ad hoc networks. Our goal is to understand the network properties that arise from different mobility models and to quantify how these differences impact communications. We generate input for Redback as a graph series for varying node density and speed in the random waypoint, reference point group, freeway, and Manhattan mobility models by sampling network topology in the ns-2 network simulator. The graph series are analyzed using several distance and metric measures in the Redback tool and visualized as a time series, one of the Redback output displays. We find measurable differences among mobility models that may impact mobile communications and influence protocol design.

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