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exscan is a network/Internet port scanner that
uses the strobe-scan technique of only scanning
certain ports, instead of a full blown port scan.
exscan is not only a port scanner, though. With
some services (such as finger and HTTP) exscan
queries the server for information (such as
the users on finger; and the server version on
HTTP). On other services (such as FTP, SMTP,
and others) exscan displays the information
returned by the server, sometimes called a
banner, and usually including the
server type and version.
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