> Or perhaps Squid is not actually doing FTP at all but just using the HTTP
> PUT and GET methods across the normal HTTP port (say 80 or 8080), to perform a
> FTP like ability (In which case command FTP will not be possible), so
> limiting FTP like access via a Web server.
This is more or less it. Squid and all similar web proxies do one of
two things:
- gateway from HTTP with ftp: as the method;
- relay HTTP to HTTP with ftp: as the method.
In both cases, the client conversation is with HTTP of the form:
GET ftp://site/path HTTP/1.x
...
In particular, squid, CERN, etc. are not general firewall solutions,
they are proxies for HTTP clients.
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