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From Yehuda Katz <yeh...@ymkatz.net>
Subject Re: [users@httpd] Help tracking down a weird error with Apache and local / remote connections.
Date Mon, 06 Feb 2017 00:38:08 GMT
This is a common enough setup that it is unlikely to be a bug and more
likely to be a configuration error.

cPanel creates VirtualHosts using the IP address of the server. For
example, I have a cPanel server running behind NAT, so there are two
default virtual hosts:

> <VirtualHost 192.168.118.82:80>
>     ServerName 192.168.118.82
>     DocumentRoot /var/www/html
>     ServerAdmin hostmaster@example.com
>     <IfModule suphp_module>
>         suPHP_UserGroup nobody nobody
>     </IfModule>
> </VirtualHost>
> <VirtualHost *>
>     ServerName ph04.example.com
>     DocumentRoot /var/www/html
>     ServerAdmin hostmaster@example.com
>     <IfModule suphp_module>
>         suPHP_UserGroup nobody nobody
>     </IfModule>
> </VirtualHost>


The actual account Virtual Host uses the IP address in the VirtualHost
block, so the default that would be selected would be the one with the IP
address:

<VirtualHost 192.168.118.82:80>
>   ServerName example.net
>   DocumentRoot /home2/example_net/public_html
>   ServerAdmin webmaster@example.net


would fall back to the first Virtual Host because it is more specific.

If there is a different IP for the website on one of your systems - for
example in the hosts file - that would cause it to all back to a different
Virtual Host than you expect because the IP doesn't match.

- Y


On Sun, Feb 5, 2017 at 6:44 PM, Spork Schivago <sporkschivago@gmail.com>
wrote:

> Yehuda,
>
> Could you please explain what you mean in a little more detail?   I only
> have one server running Apache and I only have that one DNS server.   I
> don't really see how my DNS server could be setup in such away where it
> affects Apache's DocumentRoot's directive...
>
> When I was logged into the remote server running Apache, Apache was
> serving files from a different directory than it was when I was accessing
> Apache via my local machine.   I hope that makes sense.   Looking at my
> Apache conf log, when I was accessing Apache from my local machine, it was
> acting properly, because I didn't have a VirtualHost setup for the www
> host, but when I was accessing Apache from the server that was running
> Apache, it was serving files from the domain.com VirtualHost directory.
>  ServerAliases have been commented out.   To my knowledge, this should not
> happen.
>
> I can probably regenerate it.   I've restarted the server and everything,
> but I was thinking maybe this was some sort of bug and not a misconfigured
> server.
>
> On Sun, Feb 5, 2017 at 4:47 PM, Yehuda Katz <yehuda@ymkatz.net> wrote:
>
>> Did you check your DNS to make sure both systems are resolving to the
>> same IP address?
>>
>> - Y
>>
>>
>> On Thu, Jan 26, 2017 at 3:31 PM, Spork Schivago <sporkschivago@gmail.com>
>> wrote:
>>
>>> I have a bit of a weird problem that I'd like some help tracking down.
>>> I'm pretty sure it's something with Apache.   In my Apache 2.4.25 (cPanel)
>>> config file, I have the ServerAliases disabled.   There's a "catch-all"
>>> entry for unbound IPs, that look like this:
>>>
>>> <VirtualHost *>
>>>     ServerName myhostname.mydomain.com
>>>     DocumentRoot /var/www/html
>>>     ServerAdmin myrealemail@someplace.com
>>>
>>>     <IfModule suphp_module>
>>>         suPHP_UserGroup nobody nobody
>>>     </IfModule>
>>>
>>> </VirtualHost>
>>>
>>> Further down, I have a VirtualHost entry for mydomain.com, which has a
>>> DocumentRoot of /home/<myusername>/public_html
>>>
>>> I setup a test file, /home/<myusername>/public_html
>>> /.well-known/acme-challenge/test that says www.mydomain.com-test.
>>>
>>> Then I setup another test file, /var/www/html/.well-known/acme-challenge/test
>>> that says myhostname.mydomain.com-test
>>>
>>> I have .htaccess files in /home/<myusername>/public_html that redirect
>>> all traffic to secure ports.   I have cPanel installed and have manually
>>> setup subdomains for the various cPanel stuff.
>>>
>>> Anyway, when I run the following command on the remote server:
>>>    curl http://www.mydomain.com/.well-known/acme-challenge/test
>>>
>>> I see the 301 redirect.   When I run:
>>>    curl https://www.mydomain.com/.well-known/acme-challenge/test
>>> I see the:
>>>    www.mydomain.com-test
>>>
>>>
>>> However, when I run those commands on my local Linux box instead of the
>>> remote server that's running Apache, I see:
>>>   curl http://www.mydomain.com/.well-known/acme-challenge/test
>>>   myhostname.mydomain-test
>>>
>>>   curl https://www.mydomain.com/.well-known/acme-challenge/test
>>>   www.mydomain.com-test
>>>
>>>
>>> It's not just curl, lynx, the command line web browser, does the same
>>> thing.   On the remote computer that's running Apache, for some reason, I'm
>>> seeing different results than I am when I run the commands on my local
>>> Linux box.
>>>
>>> Any idea what's going on?
>>>
>>> Thanks!
>>>
>>> Sincerely,
>>> Ken Swarthout
>>>
>>
>>
>

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