Michael O'Donnell said:
>
>While trying to read a WWW page from a site mentioned
>in Slashdot I noticed that it was only intermittently
>accessibile, so I executed a traceroute to it just out
>of curiosity and saw something that seems very weird.
>The corresponding RFC says:
>
>>3. Private Address Space
>>
>> The Internet Assigned Numbers Authority (IANA) has reserved the
>> following three blocks of the IP address space for private internets:
>>
>> 10.0.0.0 - 10.255.255.255 (10/8 prefix)
>> 172.16.0.0 - 172.31.255.255 (172.16/12 prefix)
>> 192.168.0.0 - 192.168.255.255 (192.168/16 prefix)
>>
>> We will refer to the first block as "24-bit block", the second as
>> "20-bit block", and to the third as "16-bit" block. Note that (in
>> pre-CIDR notation) the first block is nothing but a single class A
>> network number, while the second block is a set of 16 contiguous
>> class B network numbers, and third block is a set of 256 contiguous
>> class C network numbers.
>
>
>...and yet if I say "traceroute www.systemlogic.net" I see
>the following (notice the line numbered 10):
>
>
> [...deletia...]
>4 gigabitethernet6-0-136.hsipaccess2.Boston1.Level3.net (63.211.178.25)
4.911
> ms 4.632 ms 4.673 ms
>5 so-5-0-0.mp1.NewYork1.Level3.net (209.247.9.230) 10.486 ms 10.429 ms
10.258
> ms
>6 so-5-0-0.mp1.NewYork1.Level3.net (209.247.9.230) 9.955 ms 9.899 ms
9.903 ms
>7 pos8-0.core1.NewYork1.Level3.net (209.247.10.34) 10.001 ms 15.719 ms
18.004
> ms
>8 63.211.54.74 (63.211.54.74) 15.937 ms 21.690 ms 14.926 ms
>9 pairnet-1.uspitb.savvis.net (209.83.160.130) 28.220 ms 28.110 ms
28.104 ms
>10 192.168.1.6 (192.168.1.6) 28.595 ms 30.362 ms 31.889 ms
>11 216.92.21.243 (216.92.21.243) 29.577 ms 28.350 ms 31.694 ms
>
>
>Isn't it borken for that site to have an address in the 192.168.* range?
I get the same thing on the traceroute. According to the RFC, core
routers are supposed to drop packets coming from private IP addresses
(i.e. these packets are supposed to be dropped). I wonder if savvis.net
is a exposing part of their internal network (they say "SAVVIS
Communications (NASDAQ: SVVS) is a global network service provider and the
first to bring Internet economics to private IP networks with its
Intelligent IP Networking(sm) Solutions.")
Their homepage consists of flash, with only a few links, and they have
requested (not been granted yet) the service mark "INTELLIGENT IP
NETWORKING FOR DYNAMIC COMPANIES " (which, you will note, is NOT what they
put the (sm) on above)- so I guess everyone else does "Dumb IP networking"
- like following the RFC's and using Service Marks correctly.
jeff
-----------------------------------------------------------------------
Jeffry Smith Technical Sales Consultant Mission Critical Linux
[EMAIL PROTECTED] phone:603.930.9739 fax:978.446.9470
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Thought for today: cold boot n.
See boot.
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