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LFT, short for Layer Four Traceroute, is a sort of 'traceroute' that often works much faster (than the commonly-used Van Jacobson method) and goes through many configurations of packet-filter based firewalls. More importantly, LFT implements numerous other features including AS number lookups, loose source routing, netblock name lookups, et al. Though LFT has been around since 1998, its development effort has just recently resumed.

What's New

Version 3.72:
  • Several improvements


  • OS X 10.1 or later
  • libpcap

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Layer Four Traceroute User Discussion


Current Version (3.x)


Downloads 6,913
Version Downloads 311
License Free
Date 01 Sep 2014
Platform OS X / PPC 32 / Intel 32
Price Free
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