Error: Could not open command file 'nagios.cmd' for update!

[Aldo Foot]

I'm running CentOS 5 and Nagios 3.0.6.

When I click on "Re-schedule the next check of this service" I get an error:

Error: Could not open command file
'/usr/local/nagios/var/rw/nagios.cmd' for update!
The permissions on the external command file and/or directory may be
incorrect. Read the FAQs on how to setup proper permissions.
An error occurred while attempting to commit your command for processing.

I read the FAQ here:
http://www.nagios.org/faqs/viewfaq.php?faq_id=58&expand=false&showdesc=false

and followed the instructions here:
http://nagios.sourceforge.net/docs/2_0/commandfile.html

and have these file permissions:

# ls -ld /usr/local/nagios/var/rw
drwxrwsr-x 2 nagios nagcmd 4096 Dec 12 16:49 /usr/local/nagios/var/rw

# ls -l /usr/local/nagios/var/rw
prw-rw---- 1 nagios nagcmd 0 Dec 12 16:15 nagios.cmd

Note that if I disable the system firewall there is no error.
I won't get into much detail on the firewall side (building a local
policy file), because
I'd like to know whether there is a simpler, better solution to this.

thanks in advanced.
~af

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