1(.*\.)?research\.bell-labs\.com astro 2(.*\.)?cs\.bell-labs\.com astro 3(.*\.)?plan9\.bell-labs\.com astro 4(.*\.)?x\.bell-labs\.com astro 5(.*\.)?delos\.com bsdi.com 6(.*\.)?(bostic|sleepycat)\.com bostic 7alice astro 8arjuna astro 9fry astro 10gauss astro 11plan9 astro 12research astro 13rice astro 14slepian astro 15troy-ind astro 16mouse impact 17.*\.su.oz.au acsnet 18.*\.usyd.edu.au acsnet 19.*\.cbc\.ca cbc.ca 20.*\.utoronto.ca toronto.edu 21prologic.com prologic 22cert\.org sei.cmu.edu 23