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dvc5
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Joined: 06 Dec 2003
Posts: 433
Location: Sunnyvale, California
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 Posted: Sat Feb 28, 2004 6:16 am Post subject: phpsysinfo canonical hostname [SOLVED] |
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I've tried searching around and can't seem to find a clear solution to this. I'm a bit new to apache and virtual hosts. I was wondering how to properly setup the canonical hostname for my machine so that it returns "vikingnet.dyndns.org" in phpsysinfo. Currently it returns "localhost."
| Code: | vikingnet root # cat /etc/hostname
vikingnet
vikingnet root # cat /etc/domainname
dyndns.org
vikingnet root # cat /etc/dnsdomainname
dyndns.org
vikingnet root #
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My vhosts.conf:
| Code: | ################# vhosts.conf
#This is where we store the VirtualHosts configuration.
#
#Since Apache 1.3.19, we modified the setup to include some nice tricks:
#
#- Added SuExecUserGroup [user] [group] directive so VirtualHosts now work with
# suexec directive. If set, Apache will run all cgi scripts under that
# user and group (provided the uid and gid are > 1000 for security). The
# directories and cgi files *must* belong to that user/group for the
# feature to work
#- We added the Setenv VLOG directive. This works in conjunction with
# the CustomLog in commonapache2.conf. When Setenv VLOG is set, apache will
# create a /var/log/apache2/VLOG-YYYY-MM-<ServerName>.log instead of logging
# to access_log. Use this instead of defining a special logfile for
# each vhost, otherwise you eat up file descriptors.
#- You can also specify a path for the VLOG for each Vhost, for example,
# to place the logs in each user's directory. However, if you want to
# use the file for accounting, place it in a directory owned by root,
# otherwise the user will be able to erase it.
#- I suggest only including the ErrorLog *only* if the vhost will use
# cgi scripts. Again, it saves file descriptors!
################# IP-based Virtual Hosts
#<VirtualHost 192.168.2.100>
#SuExecUserGroup jmdault jmdault
#DocumentRoot /home/jmdault/public_html
#ServerName test2.com
#Setenv VLOG /home/jmdault/logs
#ErrorLogs /home/jmdault/test2-error_log
#RewriteEngine On
#RewriteOptions inherit
#</VirtualHost>
################# Named VirtualHosts
#NameVirtualHost 111.222.33.44
#<VirtualHost 111.222.33.44>
#ServerName www.domain.tld
#ServerPath /domain
#DocumentRoot /web/domain
#</VirtualHost>
NameVirtualHost *:80
##vikingnet.dyndns.org##############
<VirtualHost *:80>
ServerName vikingnet.dyndns.org
DocumentRoot /var/www/localhost/htdocs
</VirtualHost> |
Is there some duh mistake I've made? Any help would be appreciated.
_________________
#define NULL rand() /*heh heh heh */
Green Is Good
Last edited by dvc5 on Sun Feb 29, 2004 5:54 am; edited 3 times in total |
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Deebster
Tux's lil' helper
Joined: 16 Nov 2003
Posts: 126
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| Posted: Sat Feb 28, 2004 3:12 pm Post subject: |
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Do you have your eth0 IP in /etc/hosts?
Also, if you don't plan to use virtual hosts, it's easier just to leave the vhosts.conf file all commented. For this, you may need to turn UseCanonicalName Off in commonapache2.conf, which means the server will call itself what you've used to connect to it with (I'm assuming you're using apache 2). |
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dvc5
Guru
Joined: 06 Dec 2003
Posts: 433
Location: Sunnyvale, California
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| Posted: Sat Feb 28, 2004 5:49 pm Post subject: |
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Okay, I've changed my commonapache2.conf to set UseCanonicalName Off, and my vhosts.conf is commented entirely since this is the only site hosted on the machine. My /etc/hosts file is the following:
| Code: | # /etc/hosts: This file describes a number of hostname-to-address
# mappings for the TCP/IP subsystem. It is mostly
# used at boot time, when no name servers are running.
# On small systems, this file can be used instead of a
# "named" name server. Just add the names, addresses
# and any aliases to this file...
# $Header: /home/cvsroot/gentoo-src/rc-scripts/etc/hosts,v 1.7 2002/11/18 19:39:22 azarah Exp $
#
127.0.0.1 localhost localhost
127.0.0.1 vikingnet.dyndns.org vikingnet
127.0.0.1 vikingnet vikingnet
192.168.0.18 vikingnet.dyndns.org vikingnet |
However it still returns "localhost" as the canonical hostname in phpsysinfo even though I've tried restarting apache2 and rebooting the whole machine. Thanks for any help you can offer.
_________________
#define NULL rand() /*heh heh heh */
Green Is Good |
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Deebster
Tux's lil' helper
Joined: 16 Nov 2003
Posts: 126
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| Posted: Sat Feb 28, 2004 7:45 pm Post subject: |
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I just had a peek at the phpsysinfo code, and it seems that it gets that value from /proc/sys/kernel/hostname, which makes it nice and easy.
/etc/hostname is the correct file to update, but it only gets read at startup (when /etc/init.d/hostname sets the hostname in the boot run-level).
To change the hostname without rebooting do
#echo "vikingnet" > /proc/sys/kernel/hostname
or on Gentoo you can just do
# hostname "vikingnet"
I am assuming you haven't actually rebooted your machine since editing /eetc/hostname, if you have, then you have some more to do.
The hostname init script should be be running at boot, check this with
# rc-update -s | grep hostname
should show hostname | boot
If it doesn't, run
# rc-update add hostname boot |
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dvc5
Guru
Joined: 06 Dec 2003
Posts: 433
Location: Sunnyvale, California
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| Posted: Sat Feb 28, 2004 8:10 pm Post subject: |
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Thanks for the quick reply, however I'm still having the same problem.
| Code: | vikingnet root # cat /proc/sys/kernel/hostname
vikingnet
vikingnet root # cat /proc/sys/kernel/domainname
dyndns.org
vikingnet root #
relevent apache2.conf section:
vikingnet root # cat /etc/apache2/conf/apache2.conf
### /etc/apache2/conf/apache2.conf
### $Id: apache2.conf,v 1.3 2003/09/25 02:20:48 woodchip Exp $
###
### Main Configuration Section
### You really shouldn't change these settings unless you're a guru
###
ServerRoot /etc/apache2
#ServerName vikingnet.dyndns.org
#LockFile /etc/apache2/apache2.lock
PidFile /var/run/apache2.pid
ErrorLog logs/error_log
LogLevel warn
DocumentRoot /var/www/localhost/htdocs
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Perhaps it's falling back to some different hostname than what's in /proc/sys/kernel/hostname?
_________________
#define NULL rand() /*heh heh heh */
Green Is Good |
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Deebster
Tux's lil' helper
Joined: 16 Nov 2003
Posts: 126
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| Posted: Sat Feb 28, 2004 8:33 pm Post subject: |
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Well the actual function is | Code: | // get our canonical hostname
function chostname () {
if ($fp = fopen('/proc/sys/kernel/hostname','r')) {
$result = trim(fgets($fp, 4096));
fclose($fp);
$result = gethostbyaddr(gethostbyname($result));
} else {
$result = 'N.A.';
}
return $result;
} |
So let's do a code dry run  (Lazy me only skimmed it before, missing the important part)
It's definitely reading /proc/sys/kernel/hostname correctly, because you're not getting 'N.A.' returned.
We know the contents of hostname is 'vikingnet'
Looks like the problem is in gethostbyname()...
Remove the following line from your /etc/hosts
127.0.0.1 vikingnet vikingnet
gethostbyname() is finding that line first, and returning that (so gethostbyname('vikingnet') == '127.0.0.1') and as we all know (and will certainly never forget now) gethostbyaddr(127.0.0.1) == localhost
Last edited by Deebster on Sat Feb 28, 2004 8:40 pm; edited 1 time in total |
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dvc5
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Joined: 06 Dec 2003
Posts: 433
Location: Sunnyvale, California
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| Posted: Sat Feb 28, 2004 8:38 pm Post subject: |
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You are a genius! It works! Thanks so much for the help. I always miss those little details. 
_________________
#define NULL rand() /*heh heh heh */
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Deebster
Tux's lil' helper
Joined: 16 Nov 2003
Posts: 126
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| Posted: Sat Feb 28, 2004 8:44 pm Post subject: |
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No problem, but could you tell me what's going on in your avatar? 
A ghost's head floating over something metal (armour?)? |
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dvc5
Guru
Joined: 06 Dec 2003
Posts: 433
Location: Sunnyvale, California
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| Posted: Sat Feb 28, 2004 8:46 pm Post subject: |
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Hehe, that would be Lou Dog (R.I.P.). I'm a huge Sublime fan. 
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#define NULL rand() /*heh heh heh */
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Deebster
Tux's lil' helper
Joined: 16 Nov 2003
Posts: 126
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| Posted: Sat Feb 28, 2004 8:51 pm Post subject: |
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| Aaaah! Now I see. That clicked in like one of those magic eye stereogram pictures |
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dvc5
Guru
Joined: 06 Dec 2003
Posts: 433
Location: Sunnyvale, California
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| Posted: Sat Feb 28, 2004 9:13 pm Post subject: |
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If you're interested you can check out the phpsysinfo on my server: http://vikingnet.dyndns.org/sysinfo/
Too bad my mobo's so old 512MB is the maximum amt of ram. 
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#define NULL rand() /*heh heh heh */
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b0fh
Guru
Joined: 16 Jun 2003
Posts: 426
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| Posted: Sun Mar 14, 2004 9:28 am Post subject: |
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| I'm having a similar problem with phpsysinfo and my hostname. "cat /proc/sys/kernel/hostname" returns my (dyndns) hostname correct, but phpsysinfo seems to do a reverse-lookup on the ip of ppp0 which results in a hostname in the form "blabla-pool-something.myprovider.net" and I'd like more my nice dyndns-hostname there. |
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dvc5
Guru
Joined: 06 Dec 2003
Posts: 433
Location: Sunnyvale, California
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| Posted: Sun Mar 14, 2004 9:38 am Post subject: |
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What does your /etc/hosts file look like? The first entry is what phpsysinfo grabs.
_________________
#define NULL rand() /*heh heh heh */
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Deebster
Tux's lil' helper
Joined: 16 Nov 2003
Posts: 126
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| Posted: Sun Mar 14, 2004 6:12 pm Post subject: |
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| lozdvc5 wrote: | | What does your /etc/hosts file look like? The first entry is what phpsysinfo grabs. |
Weeeell, not exactly.
/etc/nsswitch.conf defines what order stuff is looked up in. Mine says "hosts: files dns", not sure if that's default. This means that it will check /etc/hosts before checking the dns server. If dns was first, it would only read the hosts file if the lookup wasn't in the dns.
Your myprovider.net hostname is your official hostname, your dyndns just happens to point to the same place.
If you want to get phpsysinfo to report your dyndns address, the easiest way is just to edit htdocs/phpsysinfo/includes/os/class.Linux.inc.php and replace | Code: | function chostname () {
if ($fp = fopen('/proc/sys/kernel/hostname','r')) {
$result = trim(fgets($fp, 4096));
fclose($fp);
$result = gethostbyaddr(gethostbyname($result));
} else {
$result = 'N.A.';
}
return $result;
} |
with | Code: | function chostname () {
return 'your.dyndns.com';
} |
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