Hi Jan,
On Wed, 27 Feb 2008, Jan Engelhardt wrote:
> in nf_conntrack_ftp.c for example we find
>
> ftp[i][j].tuple.src.u.tcp.port = htons(ports[i]);
>
> assuming the user does not specify any ports on modprobe, the default
> port list defaults to {21}, so ftp[0][x].tuple.src will contain port 21.
> But even ftp connections to non-21 ports are inspected for PORT
> commands.
Why do you think so? Ports not specified as FTP command ports are not
parsed.
Best regards,
Jozsef
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