wget: FTP Links

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1 4.5 Following FTP Links
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1 The rules for FTP are somewhat specific, as it is necessary for them to
1 be.  FTP links in HTML documents are often included for purposes of
1 reference, and it is often inconvenient to download them by default.
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1    To have FTP links followed from HTML documents, you need to specify
1 the ‘--follow-ftp’ option.  Having done that, FTP links will span hosts
1 regardless of ‘-H’ setting.  This is logical, as FTP links rarely point
1 to the same host where the HTTP server resides.  For similar reasons,
1 the ‘-L’ options has no effect on such downloads.  On the other hand,
1 domain acceptance (‘-D’) and suffix rules (‘-A’ and ‘-R’) apply
1 normally.
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1    Also note that followed links to FTP directories will not be
1 retrieved recursively further.
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