Re: iptables ip_conntrack_ftp + proftpd TLS: PORT command not understood

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On Monday 2008-05-26 22:00, Filippo Zeus wrote:

> I'm not shure, cause i'm not a developer, but i think that ftp_conntrak module
> open a port *ONLY* if
> it read first the USER command, then the PASS command, then PASV/PORT commands
> not simply if a (cleartext) PORT command came from the ftp client.

It sets up an expectation once it sees PORT/EPRT/PASV/EPSV,
regardless of USER/PASS.

It does *NOT* recognize the TLS commands SSCN/CPSV,
which is probably the problem, if you claim that the control
connection is clear-text.
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