Date: Mon, 15 Apr 2013 14:50:23 +0400 From: Lev Serebryakov <lev@FreeBSD.org> To: Kimmo Paasiala <kpaasial@gmail.com> Cc: Mark Martinec <Mark.Martinec+freebsd@ijs.si>, freebsd-net@freebsd.org, current@freebsd.org Subject: Re: ipfilter(4) needs maintainer Message-ID: <66408799.20130415145023@serebryakov.spb.ru> In-Reply-To: <CA%2B7WWSeXLC6mJXB9zv2p3e1Q-z2Xf3mH9h0SqOmiXWRGLFs4GA@mail.gmail.com> References: <20130411201805.GD76816@FreeBSD.org> <20130414160648.GD96431@in-addr.com> <36562.1365960622.5652758659450863616@ffe10.ukr.net> <201304150025.07337.Mark.Martinec%2Bfreebsd@ijs.si> <951943801.20130415141536@serebryakov.spb.ru> <CA%2B7WWSeODqdP1_7MDs6=BiGF%2BDSR62w21uu4hS3PtTDBkmshsg@mail.gmail.com> <195468703.20130415143237@serebryakov.spb.ru> <CA%2B7WWSdbEx7Kbc0WOBNLc-vH19DdKK7L-xORO8SepKcMQR2xEg@mail.gmail.com> <621849003.20130415144428@serebryakov.spb.ru> <CA%2B7WWSeXLC6mJXB9zv2p3e1Q-z2Xf3mH9h0SqOmiXWRGLFs4GA@mail.gmail.com>
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Hello, Kimmo. You wrote 15 =D0=B0=D0=BF=D1=80=D0=B5=D0=BB=D1=8F 2013 =D0=B3., 14:47:24: 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). --=20 // Black Lion AKA Lev Serebryakov <lev@FreeBSD.org>
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