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Home > Archive > Apache Server configuration support > July 2007 > apache hostname resolution
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apache hostname resolution
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| I have the oddest situation. I have a test server on the LAN. I added
a host entry for www.myserver.com (actual name changed to protect the
innocent). I can ping www.myserver.com and my resolved address matches
the host entry. Life is grand, no?
/usr/sbin/ping www.myserver.com
PING www.myserver.com: 64 byte packets
64 bytes from 10.37.74.24: icmp_seq=0. time=0. ms
I have apache configured with a virtual host for www.myserver.com.
Watch what happens when I check my virtual hosts with httpd -S. I get
the PUBLIC internet address for www.myserver.com:
$ bin/httpd -S
VirtualHost configuration:
64.157.185.199:80 www.myserver.com (/usr/local/httpd/conf/vhosts/
80_myserver.com:5)
wildcard NameVirtualHosts and _default_ servers:
*:443 is a NameVirtualHost
default server www.myserver.com (/usr/local/httpd/conf/vhosts/
443_myserver.com:4)
port 443 namevhost www.myserver.com (/usr/local/httpd/conf/
vhosts/443_myserver.com:4)
*:80 is a NameVirtualHost
default server www.default.com (/usr/local/httpd/conf/
default.conf:4)
Okay, so I went to nsswitch.conf and TURNED DNS OFF. At this point,
resolver's only recourse is to use /etc/hosts. No matter, the answer
is EXACTLY the same:
$ bin/httpd -S
VirtualHost configuration:
64.157.185.199:80 www.myserver.com (/usr/local/httpd/conf/vhosts/
80_myserver.com:5)
wildcard NameVirtualHosts and _default_ servers:
*:443 is a NameVirtualHost
default server www.myserver.com (/usr/local/httpd/conf/vhosts/
443_myserver.com:4)
port 443 namevhost www.myserver.com (/usr/local/httpd/conf/
vhosts/443_myserver.com:4)
*:80 is a NameVirtualHost
default server www.default.com (/usr/local/httpd/conf/
default.conf:4)
Obvioulsy apache's getting that answer from DNS. That IP address is
not listed anywhere on the server. I don't understand where, how or
why it's resolving www.myserver.com. Any insight?
Jeff
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| Mark Taylor 2007-07-10, 1:26 pm |
| Jeff <joesiege@gmail.com> wrote in news:1184072284.934837.305940
@k79g2000hse.googlegroups.com:
> 64.157.185.199:80
Obviously, as a test server you are not using a hostname that actually will
resolve. And, httpd process likely does not use the conventional path of
resolving names, i.e. hosts file first, then dns, therefore the httpd -S
does not look at your hosts file.
The result is likely a default IP address from your ISP address block.
Not sure though... I've never had the occasion to do any tests on that.
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| #2pencil 2007-07-12, 1:21 pm |
| Is it possible that the results are simply cached?
Try flushing your DNS (resolved) cache & seeing if you get the same
results.
========================================
==================
How to Flush DNS in Linux:
/etc/rc.d/init.d/nscd restart
========================================
==================
How to Flush DNS in Microsoft Windows:
C:\>ipconfig /flushdns
========================================
==================
How to Flush DNS in Mac OSX:
bash-2.05a$ lookupd -flushcache
-#2pencil-
http://www.akroncdnr.com
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