Date: Sun, 26 Feb 2006 22:56:32 +0200 From: Rostislav Krasny <rosti.bsd@gmail.com> To: Hajimu UMEMOTO <ume@freebsd.org> Cc: freebsd-stable@freebsd.org, freebsd-stable-local@be-well.ilk.org, yar@comp.chem.msu.su, dwmalone@maths.tcd.ie, des@des.no, mak@ll.mit.edu, MH@kernel32.de Subject: Re: SSH login takes very long time...sometimes Message-ID: <20060226225632.64b41ee8.rosti.bsd@gmail.com> In-Reply-To: <yge3bi6m2n8.wl%ume@mahoroba.org> References: <20060218012029.e146e2ff.rosti.bsd@gmail.com> <20060219104912.GB20500@comp.chem.msu.su> <20060219225701.0e3e244b.rosti.bsd@gmail.com> <20060221165959.GB77513@comp.chem.msu.su> <20060222024430.ad4b5c60.rosti.bsd@gmail.com> <yge1wxvz5ha.wl%ume@mahoroba.org> <20060223235727.33cddb13.rosti.bsd@gmail.com> <ygefym98o7i.wl%ume@mahoroba.org> <20060224155153.f7da1a52.rosti.bsd@gmail.com> <ygewtfkelbu.wl%ume@mahoroba.org> <20060224174007.GF36227@comp.chem.msu.su> <20060225024246.d6284719.rosti.bsd@gmail.com> <ygeslq7ew25.wl%ume@mahoroba.org> <20060225164648.a4eed65c.rosti.bsd@gmail.com> <ygek6bje6h3.wl%ume@mahoroba.org> <20060226014630.cc0b04ab.rosti.bsd@gmail.com> <ygehd6ndk29.wl%ume@mahoroba.org> <20060226174019.875dbb24.rosti.bsd@gmail.com> <yge3bi6m2n8.wl%ume@mahoroba.org>
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On Mon, 27 Feb 2006 02:49:15 +0900 Hajimu UMEMOTO <ume@freebsd.org> wrote: > Hi, > > >>>>> On Sun, 26 Feb 2006 17:40:19 +0200 > >>>>> Rostislav Krasny <rosti.bsd@gmail.com> said: > > rosti> It will require to specify a virtual host for each address or to use > rosti> hostname with multiple addresses only once. Specifying a virtual host by > rosti> a hostname and registering multiple hostname's addresses in /etc/hosts > rosti> should not be confusing, IMHO. If the addresses are already registered > rosti> on DNS, the work is even simpler. > > rosti> Even specifying virtual hosts by addresses should not be confusing, > rosti> because IPv4-mapped IPv6 address and the IPv4-mapped itself are > rosti> certainly not the same, although they are mapped each to other. Indeed, > rosti> someone could want to specify different virtual ftp hosts for IPv4 and > rosti> mapped to it IPv6 addresses. For example to use different motd, welcome > rosti> or statfile files. > > Then, you are already confused. > > rosti> When a remote address is an IPv4-mapped IPv6 address, why the local IPv6 > rosti> address must be of the same type and cannot be any regular IPv6 address? > > Because, the connection uses an IPv4 to communicate with each other. > There is two representation for one IPv4 address; native IPv4 address > and an IPv4-mapped IPv6 address. It is thorny thing. You may be right and I'm confused. I don't have much experience with IPv6. I just thought that any unicast IPv6 host, even IPv4-mapped IPv6 host, can communicate with any other unicast IPv6 host, including non-IPv4-mapped IPv6 host. Could you please suggest a good comprehensive article on the Web about IPv4-mapped IPv6 addresses and their usage? By the way, why you don't do the address type test in a daemon mode of ftpd?
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