UNIX monitoring Windows using Nagios Core

[dwasswa]

Just to be clear? Do you wish to open this port on your windows server or Red Hat?

If Red Hat,see instructions below...

To check the current firewall rules, use this command:

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sudo iptables -L

Starting with CentOS and RHEL 7, firewall rule settings are managed by firewalld service daemon. A command-line client called firewall-cmd can talk to this daemon to update firewall rules permanently.

To open up a new port (e.g., TCP/80) permanently, use these commands:

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$ sudo firewall-cmd --zone=public --add-port=80/tcp --permanent

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$ sudo firewall-cmd --reload

Check the updated rules with:

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$ firewall-cmd --list-all 

Have you also looked at this doc? see below....
https://assets.nagios.com/downloads/nag ... ios-XI.pdf

[tmcdonald]

Thanks for the assist, @Derick Wasswa! OP, let us know if you need further assistance.