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On Wednesday, 10 March 2021 16:00:19 GMT Mark Knecht wrote: |
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> <SNIP> |
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> |
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> > mark@science:~$ cat /etc/hosts |
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> > 127.0.0.1 localhost |
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> > 127.0.1.1 science |
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> |
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> <SNIP> |
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> <SNIP |
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> I think this is relevant to DNS resolution of/with domain controllers and |
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> may |
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> depend on the AD/DC topology. The idea is to use the LAN address of the box |
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> as the first address in /etc/hosts and use 127.0.0.1 as the second address |
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> in |
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> the file. If more AD/DNS servers exist in the network, then 127.0.0.1 could |
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> be even further down the list. |
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> |
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> https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-se |
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> rver-2008-R2-and-2008/ff807362(v=ws.10)?redirectedfrom=MSDN |
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> |
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> I haven't over-thought this and there may be more to it, but on a pure linux |
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> environment I expect this would not be a requirement, hence the handbook |
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> approach. |
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> <SNIP> |
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> |
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> It could very well be but I have vague memories when I first started |
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> getting |
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> interested in Linux, circa 1996-97 with Redhat, that I would buy books that |
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> liberally sprinkled http://localhost or ping localhost sorts of lines in |
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> the text and |
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> examples. |
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> |
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> My undocumented (and unsupported by data) opinion is that this localhost |
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> thing has been around a long, long time - possibly longer than Linux for |
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> all I know. Check out |
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> |
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> http://acme.com |
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> |
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> I have no real admin experience with any version of Windows. Even though |
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> I wrote, published and made a tiny bit of money selling a Windows program |
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> written in Turbo Pascal in those days I didn't even have networking. |
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> Everything was passed around on floppies. |
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|
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I always thought the localhost class A addresses were from days of old 'inter- |
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network' era. The difference with 127.0.0.1 and a private LAN address is the |
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127.0.0.1 does not reach the data link layer, but loops-back at IP layer 3 and |
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responds to any applications on the local PC. So, I understood this to mean |
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it never went through the whole network stack, as it does when you ping a |
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remote host. |
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