Date: Sun, 22 Jul 2001 17:22:32 -0400 From: Anthony Schneider <aschneid@mail.slc.edu> To: Matt Dillon <dillon@earth.backplane.com> Cc: Hajimu UMEMOTO <ume@mahoroba.org>, brian@Awfulhak.org, ras@e-gerbil.net, roam@orbitel.bg, freebsd-security@FreeBSD.ORG, freebsd-gnats-submit@FreeBSD.ORG Subject: Re: bin/22595: telnetd tricked into using arbitrary peer ip Message-ID: <20010722172232.A94306@mail.slc.edu> In-Reply-To: <200107222117.f6MLHwr11669@earth.backplane.com>; from dillon@earth.backplane.com on Sun, Jul 22, 2001 at 02:17:58PM -0700 References: <ras@e-gerbil.net> <200107212234.f6LMYUg79964@hak.lan.Awfulhak.org> <20010723.053051.88524825.ume@mahoroba.org> <200107222117.f6MLHwr11669@earth.backplane.com>
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On Sun, Jul 22, 2001 at 02:17:58PM -0700, Matt Dillon wrote:
>
> :It is problem of w(1). `w -n' does forward lookup for IPv4 only and
> :IPv6 is not supported at all. When available, login(1) writes
> :hostname into utmp instead of IP address. If hostname is saved, `w
> :-n' queries A RR for the hostname.
> :Real problem is that UT_HOSTSIZE is too short to hold IPv6 address.
> :Is there any chance to expand UT_HOSTSIZE in time to 5.0-RELEASE. It
> :apparently breaks binary compatibility.
> :
> :--
> :Hajimu UMEMOTO @ Internet Mutual Aid Society Yokohama, Japan
> :ume@mahoroba.org ume@bisd.hitachi.co.jp ume@{,jp.}FreeBSD.org
>
> I think if we are going to increase UT_HOSTSIZE, then 5.0 (i.e. now)
> is exactly the right time to do it. How large does UT_HOSTSIZE
> have to be to accomodate an IPV6 address?
>
> -Matt
>
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