Evaluating Third-Party Bad Neighborhood Blacklists for Spam Detection

The distribution of malicious hosts over the IP address space is far from being uniform. In fact, malicious hosts tend to be concentrate in certain portions of the IP address space, forming the so-called Bad Neighborhoods. This phenomenon has been previously exploited to filter Spam by means of Bad Neighborhood blacklists. In this paper, we evaluate how much a network administrator can rely upon different Bad Neighborhood blacklists generated by third-party sources to fight Spam. One could expect that Bad Neighborhood blacklists generated from different sources contain, to a varying degree, disjoint sets of entries. Therefore, we investigate (i) how specific a blacklist is to its source, and (ii) whether different blacklists can be interchangeably used to protect a target from Spam. We analyze five Bad Neighborhood blacklists generated from real-world measurements and study their effectiveness in protecting three production mail servers from Spam. Our findings lead to several operational considerations on how a network administrator could best benefit from Bad Neighborhood-based Spam filtering

Finding and Analyzing Evil Cities on the Internet

IP Geolocation is used to determine the geographical location of Internet users based on their IP addresses. When it comes to security, most of the traditional geolocation analysis is performed at country level. Since countries usually have many cities/towns of different sizes, it is expected that they behave differently when performing malicious activities. Therefore, in this paper we refine geolocation analysis to the city level. The idea is to find the most dangerous cities on the Internet and observe how they behave. This information can then be used by security analysts to improve their methods and tools. To perform this analysis, we have obtained and evaluated data from a real-world honeypot network of 125 hosts and from production e-mail servers

Sustainability and the City: New Kensington CDC's Sustainable 19125 Initiative

New Kensington Community Development Corporation (NKCDC), an organization long dedicated to revitalizing the East Kensington, Fishtown, and Port Richmond neighborhoods of Philadelphia, launched an urban sustainability initiative in 2009 called "Sustainable 19125." The initiative's goal is to make the 19125 ZIP code the most sustainable ZIP code in the city

Dreams and Schemes in Queens, New York: Immigrant Struggles to Find Work and Get Status in the Face of Consumer Fraud

This report documents the systemic nature of consumer frauds committed against immigrants and offers solutions for improved laws, policies, and enforcement mechanisms to better protect immigrants. While this research focuses on the experience of Latino immigrants in one area of Queens, our findings speak to a larger problem affecting New York City and the rest of the country

Reinventing Municipal Governance: From the New Generation of Big-City Mayors

The decade of the 1990s brought to power in many American cities a new breed of mayors who have sought to reinvent municipal governance through a variety of innovations that, like the mayors themselves, defy easy partisan or ideological classification. These innovations are widely viewed as having helped to turn around such cities as Philadelphia, Cleveland, New York, and Chicago. The purpose of this paper is to explain the most notable of these innovations for possible consideration by Atlanta's incoming mayor

Report on the Status of Payday Lending in California

Provides an overview of storefront and Internet payday lending in California, its effects, state and federal laws and regulations, and reform efforts. Includes recommendations for state and local policy, banking access, and consumer education