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Date:      Wed, 21 Apr 1999 16:54:35 -0500
From:      Jacques Vidrine <n@nectar.com>
To:        Jason Canon <JCanon@comtechnologies.com>
Cc:        freebsd-stable@FreeBSD.ORG
Subject:   Re: netstat -r 
Message-ID:  <19990421215436.049631E4C@spawn.nectar.com>
In-Reply-To: <71F888185DE0D01191CD00C0DFA9A3081C9E34@MX> 
References:  <71F888185DE0D01191CD00C0DFA9A3081C9E34@MX>

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Looks to me like IANA and/or InterNIC decided to add reverse mappings for the
RFC1918 addresses.  e.g.

 dig -x 10.0.0.1

; <<>> DiG 8.1 <<>> -x 
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 1
;; QUERY SECTION:
;;      1.0.0.10.in-addr.arpa, type = ANY, class = IN

;; ANSWER SECTION:
1.0.0.10.in-addr.arpa.  1D IN PTR       read-rfc1918-for-details.iana.net.

;; AUTHORITY SECTION:
10.in-addr.ARPA.        1D IN NS        ns2.internic.net.
10.in-addr.ARPA.        1D IN NS        blackhole.ISI.EDU.

;; ADDITIONAL SECTION:
ns2.internic.net.       1D IN A         198.41.0.11

;; Total query time: 290 msec

Jacques Vidrine / n@nectar.com / nectar@FreeBSD.org

On 21 April 1999 at 17:31, Jason Canon <JCanon@comtechnologies.com> wrote:
> Our FreeBSD server has been in operation for about a year and it just
> runs like a charm.  Every so often
> I do "netstat -r" just to make sure that I'm still being the bandwidth
> hog on our network.  Today, however,
> instead of the customary inverse-mapping that I get from the /etc/hosts
> file I got a note on each listing  saying:
> 
> 	"read-rfc1918-for-details.iana.net" followed by our Private IP
> Address and Ethernet Address
> 
> What could have changed to create this output?  We have always been
> using RFC 1918 addressing
> along with NAT.
> 
> Thanks,
> Jason
> 
> 
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