Login to WHM, Click on the “Tweak Settings” link under “Server Setup”. Within the mail section is a check box with the heading:

“Prevent the user ‘nobody’ from sending out mail to remote addresses (php and cgi scripts generally run as nobody if you are not using phpsuexec and suexec respectively.)”

Tick the check box and and apply the changes by clicking on the “Save” button at the bottom of the page.

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Fix cgi scripts that are returning a 500 error because of permissions : /scripts/fixsuexeccgiscripts This reads /usr/local/apache/logs/suexec_log and looks for errors and tries to fix them, though if you still get errors, tail that log file and see what the error is.

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To verify PHP is running in CGI for webmail, go to IIS Manager -> Websites -> webmail -> properties.

Select the home directory tab -> Configuration -> Application mappings, ensure that the extension .php is being handled by the executable version of PHP which is in

“C:\Program Files\SWsoft\Plesk\Additional\Php\php.exe”.

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it.)
On the “Internet Information Services” tab (the first one you see), click the “Edit …” button next to “WWW Service” in the drop-down combo box

titled “Master Properties”.
Select the “Home Directory” tab.
Click the “Configuration …” button located near the lower right-hand side of the tab.
Check to make sure that the extension you are modifying is not already in the list!
Click the “Add” button.
Use the “Browse …” button to find the path to the executable you want to handle parsing files with the extension you are about to modify. (ex.

“C:\WINNT\System38\inetsrv\asp.dll” if you want to parse ASP code in the file; “C:\Perl\Perl.exe %s” if you want to parse the file as if it had a *.pl

extension. NOTE: Your paths will be different from mine.)
Add the extension you want to modify. (ex. “.css”, “.cgi”)
Change the verbs to “GET, POST, HEAD”. (I don’t know why. Just do it. It works.)
Click “OK” until you get all the way back to the main screen.
You will – most likely – have to restart the IIS service on the machine.

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STEP 1: Check Permissions and Group Ownership

To start, you’ll want to check the /var/log/httpd/suexec_log. The log contains any errors that would result from not having correct permissions set on the file.

The file needs to be in a cgi-bin and must have the owner/group as the username who owns the site. If it’s owned be anyone else, it will not run. Also, the script must have execute permission.

The most common chmod permission is 755 (or rwxr-xr-x). You’ll need to go through all your directories from the public_html down to the directory the script is in, making sure that all permissions are set to 755 (*Note: public_html can be 750 *only* if it has a group of apache).

If Using a Hivelocity Server (Special Requirements)

If you’re one of our customers and you’re experiencing an Internal Server Error 500 on your CGI scripts, then it might be due to missing requirements specific to our servers. The Apache Server software that we run on our Hivelocity web servers has certain group ownership and permissions requirements for CGI scripts. Please check to see that your script meets the following requirements:

• The directory the CGI script resides in must not be writable by other or by group users.
• The CGI script itself must not be writable by other or by group users.
• CGI script must not have the setuid bit set.
• You must call SSI execs by their full pathname. For example, if you are running a UNIX command located on the web server it would look something like this:

  <!--#exec cmd="/usr/bin/date"-->

  If you are running a script that is in your pcgi-bin, it might look something like this for corp-web customers:

  <!--#exec cmd="/htdocs/youruserid/pcgi-bin/bar.pl"-->

  and like this for cheap-web and personal web customers:

  <!--#exec cmd="/htdocs/userdirs/youruserid/pcgi-bin/bar.pl"-->

• The target userid may not be < 100 and the target gid may not be < 20. This rule only affects staffers’ CGI scripts. Staffers must chgrp their scripts to group users or some other group.
• The minimum permissions for CGI scripts is mode 500. For CGI compiled programs, the minimum permissions is mode 100. You can of course grant more permissions if you wish.
• The minimum permissions for server-parsed-html (.shtml) files is mode 004 (readable by other), and exec files included therein must be at least mode 700 for scripts and mode 500 for binaries.

STEP 2: Troubleshooting your CGI Script

If you’ve checked the suexec_log and it only shows the script being run, then it might not be an issue with permissions. The cause of the error may be within the script code itself.

The easiest way to figure out script coding problems is to first run the script manually from an ssh prompt. You can do that using a variation of the following commands:

cd /home/username/domains/domain.com/public_html/cgi-bin

./script.cgi

One common error is the use of an incorrect interpreter. The two most common interpreters are:

#!/usr/bin/perl

and

#!/usr/local/bin/php

This code must appear on the first line of the script.

Sometimes, a file is uploaded in Windows format causing the trailing newline (return) character to form incorrectly. In this instance, the file would need to be re-uploaded in a different format.

Another error that could be generated when running the script manually from ssh would be missing perl modules. If you’re missing perl modules, you’ll need to install them manually. Using CPAN (The Comprehensive Perl Archive Network) is the easiest method to install new perl modules. This can be done with the following command:

eg: perl -e shell -MCPAN install Bundle::DBD::mysql

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2) Always upload and download a cgi in ASCII transfer mode.

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