The Uniform Server setup for online web server is the same as for
offline server. The IP address used is 192.168.1.7. The difference is that the
online server is connected to the internet. The Internet Service Provider being
used in this research is TM Streamyx Dynamic 1 MBps. This ISP provides an
internet with dynamic IP address connection. The external IP address will
change periodically depending on the ISP. This leads to an access problem to
existing setup to act as a server. To solve that problem, DtDNS service is
used. DtDNS is a complete provider of DNS hosting and DNS management services
with a focus on dynamic DNS and dynamic IP address management. There is a free
domain name provided and tracking software to automatically update IP address
as it changes. This free service enables a dynamic IP address to host a service
just as it had a static IP address. The DtDNS service hostname details for this
offline email system configured where the hostname is pemail and domain is
suroot.com.
Cron is used to
integrate DtDNS with Uniform Server.
Cron originated from a UNIX environment. It is a job scheduler allowing scripts
to be run automatically at a certain time or date. Cron has been integrated
into Uniform Server 7.1.4. The script
has been pre-configured to run the three scripts which are Drupal Cron, Moodle
Cron and DtDNS automatic IP updater. Only script for DtDNS automatic IP updater
used for this offline email system. Cron automatic update default period is
every ten minutes. DtDNS automatic IP updater has been pre-configured, but it
is disabled by default on Uniserver. To
enable DtDNS automatic IP updater, Cron configuration file in
C:\PEmailOffline\UniServer\unicon\main\run_cron.php edited by changing lines in
the section list of scripts to be run as shown in Table 5.5 (A). Then those
lines uncomment as shown in Table 5.5 (B).
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A
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// $cmd = 'start
..\..\usr\local\php\php-win.exe
..\..\plugins\dtdns_updater\dtdns_updater.php';
// pclose(popen($cmd,'r')); // Start detatched process
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B
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$cmd = 'start
..\..\usr\local\php\php-win.exe
..\..\plugins\dtdns_updater\dtdns_updater.php';
pclose(popen($cmd,'r')); // Start detatched process
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DtDNS account details where the
hostname is pemail.suroot.com and password configured in a Cron script
configuration file located in:
“C:\PEmailOnline\UniServer\plugins\dtdns_updater\dtdns.ini”
Uniserver
uses binary code 1 which means perform the function while 0 means ignore and do
nothing. Default value "7" is a total of 1+2+4 which will run the
Apache, MySQL and Index page processes. Cron Binary code is
"16".Total binary code value for Apache, MySQL and Cron is 19. Figure
5.1 shows the binary codes have been assigned.
Figure 5.1:
Uniform Server Binary Codes
To enable automatic
Cron on Uniserver, file in “C:\PEmailOffline\UniServer\unicon\main\includes\config.inc.php”
edited as shown in Table 5.6. This binary code value will enable the Apache,
MySQL, Index page processes and Cron run when the Uniserver program started.
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$server_standard = 19;
$server_service = 19;
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Apache, MySQL
and Cron need to be configured to start up all at once. Cron can be configured
to run automatically when the servers are started by editing file in
C:\PEmailOnline\UniServer\unicon\tray_menu\UniTray1.ini. Under “LEFT MENU”
there are lines to control Server Start and Stop. Programs or batch files that
run either of the control scripts start_servers.php or stop_servers.php must
include a single binary coded parameter. If this parameter is missing defaults
value 7 are used. A parameter overrides any default settings this allows
independent control of a particular function. Then, default binary code should
be changed from 7 to 19 for these lines "%PHP%\php.exe";
Parameters: " -n %ServerConMain%\start_servers.php 19"; as
per Table 5.7 below:
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;=== LEFT MENU ============
[Menu.Left]
Type: item; Caption: "Start UniServer (Apache
MySQL)"; Action: shellexecute; FileName: "%PHP%\php.exe";
Parameters: " -n %ServerConMain%\start_servers.php 19"; ShowCmd:
hidden; Glyph: 9
Type: item; Caption: "Stop UniServer (Apache MySQL)"; Action:
shellexecute; FileName: "%PHP%\php.exe"; Parameters: " -n
%ServerConMain%\stop_servers.php 19";ShowCmd: hidden; Glyph: 11
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