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Designing and evaluating interleaving decompressing and virus scanning in a stream-based mail proxy

Authors
Journal
Journal of Systems and Software
0164-1212
Publisher
Elsevier
Publication Date
Volume
81
Issue
9
Identifiers
DOI: 10.1016/j.jss.2007.10.003
Keywords
  • Mail Proxy
  • Virus Scanning
  • Decompression
  • Stream-Based
  • Interleaving
Disciplines
  • Design

Abstract

Abstract A storage-based anti-virus access gateway is not scalable because it stores the entire mail under processing. This work designs and evaluates a stream-based mail proxy constructed from several open-source packages. This proxy processes mail in segments, and interleaves MIME parsing, decoding, decompressing and virus scanning. It is seven times faster than the storage-based one on forwarding, three times faster on virus scanning, and twice as faster on decompressing plus virus scanning. This proxy can keep nearly constant memory usage and work without disks, while the storage-based one requires memory and disk space proportional to the number of clients and the mail size.

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