[19120] in North American Network Operators' Group
Re: Urrr... A-root server foul ?
daemon@ATHENA.MIT.EDU (Chris Cappuccio)
Wed Aug 26 17:58:13 1998
Date: Wed, 26 Aug 1998 14:47:34 -0700 (PDT)
From: Chris Cappuccio <chris@empnet.com>
To: Richard Irving <rirving@onecall.net>
cc: nanog@merit.edu
In-Reply-To: <35E46042.70735788@onecall.net>
On Wed, 26 Aug 1998, Richard Irving wrote:
> Is anyone else seeing this ? really *cool* udp trick,
> or is bcast space now DNS capable ? What am I missing ?
>
> Server: ns2.mci.net
> Address: 204.70.57.242
>
> Non-authoritative answer:
> Name: A.ROOT-SERVERS.NET
> Address: 198.41.0.4
>
> And a ping yields ?
>
>
> 64 bytes from 198.41.0.4: icmp_seq=16 ttl=250 time=59 ms
> 64 bytes from 198.41.0.4: icmp_seq=16 ttl=249 time=76 ms (DUP!)
> 64 bytes from 198.41.0.4: icmp_seq=16 ttl=250 time=77 ms (DUP!)
> 64 bytes from 198.41.0.4: icmp_seq=17 ttl=250 time=57 ms
> 64 bytes from 198.41.0.4: icmp_seq=17 ttl=250 time=64 ms (DUP!)
> 64 bytes from 198.41.0.4: icmp_seq=17 ttl=249 time=73 ms (DUP!)
> 64 bytes from 198.41.0.4: icmp_seq=18 ttl=250 time=71 ms
> 64 bytes from 198.41.0.4: icmp_seq=19 ttl=250 time=53 ms
> 64 bytes from 198.41.0.4: icmp_seq=19 ttl=249 time=57 ms (DUP!)
> 64 bytes from 198.41.0.4: icmp_seq=19 ttl=249 time=73 ms (DUP!)
>
Actually, let's use 12.7.96.0/24 as an example...
12.7.96.6 is the only machine in this range that has an answer on port 53
for DNS
empnet:chris {104} nslookup
Default Server: mimosa.noc.empnet.com
Address: 12.7.96.6
> server 12.7.96.255
Default Server: [12.7.96.255]
Address: 12.7.96.255
> merit.edu
Server: [12.7.96.255]
Address: 12.7.96.255
Non-authoritative answer:
Name: merit.edu
Address: 198.108.1.42
>
---
The following sentence is false
The preceding sentence is true
