John Beckett wrote:
>> Do you know why vim website doesn't respond to
>> 'http://vim.org'? and responds only 'http://www.vim.org'
>
> Apart from the possibility as Tony mentioned that a browser
> may attempt to use www.vim.org if vim.org fails to resolve,
> the reason vim.org might work is because the DNS name servers
> responsible for vim.org would include an A address record for
> vim.org as well as for www.vim.org.

This issue is due to DNS server config.

Sourceforge has multiple websites on the same IP address.
For example, each of these is at 216.34.181.97:
    http://www.vim.org/
    http://www.jedit.org/
    http://www.7-zip.org/

The web browser specifies which website it wants when it sends a
GET request to the IP address, and Sourceforge delivers the
correct web page based on that URL. It appears that Sourceforge
does not care whether "www." is included or not; these work:
    http://jedit.org/
    http://7-zip.org/

Currently, http://vim.org/ does not work. However, that is
because the DNS servers for vim.org do not include a suitable
entry for 'vim.org'. With the following in your hosts file:
    216.34.181.97 vim.org

you can browse http://vim.org/ ok.

There is also a problem with the vim.org DNS servers, and I will
communicate with Bram about that (the secondary DNS server has
been dead or unreachable for at least a day, and the primary
sometimes does not respond).

John

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