As brd said, nmap does that and much more, if that is a tool which is available to you. If you aren't familiar with nmap, it will write output files in several different formats, including:
  • normal (-oN)
  • XML (-oX)
  • "s|<rIpt kIddi3" (-oS)
  • grepable format (-oG)

    In reply to Re^2: Testing for port connectivity by RobPayne
    in thread Testing for port connectivity by Anonymous Monk

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