Re: ipfilter(4) needs maintainer

On Mon, Apr 15, 2013 at 02:50:23PM +0400, Lev Serebryakov wrote:

> KP> I'm however talking about an ftp client behind a very restrictive
> KP> firewall making an IPv6 connection an ftp server that uses passive
> KP> mode data ports that can't be known in advance.
>   Same solution -- inspection of connections to 21 port, without any
>  address translation. And if FTP server uses non-standard control
>  port, yes, here is a problem, but it cannot be solved with NAT too
>  (or your NAT/firewall should expect each and every connection for FTP
>  commands, which is heavy and error-prone task).

Not heavy.
But error-prone, yes.
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