Date: Sun, 22 Jul 2001 14:17:58 -0700 (PDT) From: Matt Dillon <dillon@earth.backplane.com> To: Hajimu UMEMOTO <ume@mahoroba.org> Cc: 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: <200107222117.f6MLHwr11669@earth.backplane.com> References: <ras@e-gerbil.net> <200107212234.f6LMYUg79964@hak.lan.Awfulhak.org> <20010723.053051.88524825.ume@mahoroba.org>
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: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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