Date: Mon, 08 Sep 2003 15:59:51 -0500 From: Jeremy Messenger <mezz7@cox.net> To: Andreas Klemm <andreas@freebsd.org> Cc: freebsd-hackers@freebsd.org Subject: Re: PUzzling sshd behaviour Message-ID: <opru68l1a78ckrg5@smtp.central.cox.net> In-Reply-To: <20030908202727.GA49862@titan.klemm.apsfilter.org> References: <3F589E94.1080508@xwave.com> <20030905154646.GA59881@rot13.obsecurity.org> <20030906213428.GF29217@spc.org> <3F5A8FDB.3050507@newsguy.com> <20030907015510.GG29217@spc.org> <20030908202727.GA49862@titan.klemm.apsfilter.org>
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On Mon, 8 Sep 2003 22:27:27 +0200, Andreas Klemm <andreas@freebsd.org>
wrote:
> On Sun, Sep 07, 2003 at 02:55:10AM +0100, Bruce M Simpson wrote:
>> On Sat, Sep 06, 2003 at 10:54:35PM -0300, Daniel C. Sobral wrote:
>> > Bruce M Simpson wrote:
>> > >On Fri, Sep 05, 2003 at 08:46:46AM -0700, Kris Kennaway wrote:
>> > >>The fact that sshd requires reverse IP resolution is well-known
>> > >>behaviour. It's probably the most common FAQ about sshd ("Why is my
>> > >>login taking 60 seconds to present the password prompt?").
>> > >
>> > >But what about:
>> > > VerifyReverseMapping
>> > > Specifies whether sshd should try to verify the remote
>> host
>> > > name
>> > > and check that the resolved host name for the remote IP
>> > > address
>> > > maps back to the very same IP address. The default is
>> ``no''.
>> >
>> > AFAIK, that means the reverse mapping result will not be held against
>> > you. :-)
>>
>> This sounds like a bug. Does anyone else agree?
>
> Yes and I really needed this functionality in a project for 12 Suns...
>
> But it didn't work as expected from the description.
>
> And for me a functionality like being able to prevent reverse lookup
> would be completely logical ...
>
> Result was to create about 20 /etc/hosts entries on every sun, to
> prevent this 60 seconds timeout for our Out Of Band login via VPN
> and from sun to sun etc etc
My solution is to install and setup dnscache to do the local DNS cache.
Cheers,
Mezz
> Andreas ///
--
bsdforums.org 's moderator, mezz.
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