https://tools.ietf.org/html/rfc1918
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.
On Fri, Mar 4, 2016 at 10:47 AM, Clark Morris <[email protected]> wrote:
> On 4 Mar 2016 08:23:22 -0800, in bit.listserv.ibm-main you wrote:
>
>>On Fri, Mar 4, 2016 at 10:16 AM, Leonardo Vaz <[email protected]> wrote:
>>
>>> That's not a private IP address on his LAN, it is the gist.github.com IP
>>> address.
>>>
>>
>>?Correct. But if the LAN authorities think, as he did, that 192.0.0.0/8 is
>>all private, instead of just 192.168.0.0/16, then their routing tables may
>>be set up to not forward 192.30.252.141 to the outside world, but route the
>>entire 192.0.0.0/8 to the inside only. Which would time out. As it did.?
>>
> My Internet provider uses 192.169.2.1-255 as private for its
> customers. All of the devices on my home network are 192.169.2.n.
>
> Clark Morris
>>
>>>
>>> -----Original Message-----
>>> From: IBM Mainframe Discussion List [mailto:[email protected]] On
>>> Behalf Of John McKown
>>> Sent: Friday, March 04, 2016 11:13 AM
>>> To: [email protected]
>>> Subject: Re: gist.github.com unreachable [was: RE: rexx and tso alllocate]
>>>
>>> On Fri, Mar 4, 2016 at 9:50 AM, Farley, Peter x23353 <
>>> [email protected]> wrote:
>>>
>>> > You aren't the only one Steve. From my employer's network I can't
>>> > reach gist.github.com at all, even just the main site never mind John's
>>> area.
>>> > Trying a tracert to gist.github.com only gets timeouts:
>>> >
>>> > Tracing route to gist.github.com [192.30.252.141] over a maximum of 30
>>> > hops:
>>> >
>>> > 1 * * * Request timed out.
>>> > Etc.
>>> >
>>> > That DNS address (192.30.252.141) looks odd to me. I thought
>>> > 192.*.*.* was reserved for private local networks, or is that only
>>> 192.168.*.*?
>>> >
>>>
>>> ?the private IPv4 address ranges are:? 10.0.0.0/8, 172.16.0.0/12, and
>>> 192.168.0.0/16 ref: https://en.wikipedia.org/wiki/Private_network
>>>
>>> ?I'll almost bet your LAN people are laboring under the same delusion.
>>>
>>>
>>> >
>>> > I can reach gist from home though, maybe you can as well.
>>> >
>>> > Peter
>>> >
>>>
>>>
>>> --
>>> A fail-safe circuit will destroy others. -- Klipstein
>>>
>>> Maranatha! <><
>>> John McKown
>>>
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>
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--
Mike A Schwab, Springfield IL USA
Where do Forest Rangers go to get away from it all?
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