Nagios Support Forum

Hi Experts,

This is my first post here. Please excuse me if I am asking a stupid question. I have seen a Nagios check config like this.

define command {
command_name check_site
command_line $USER1$/check_http -S -H $ARG1$ -I $HOSTADDRESS$ -p $ARG2$ -u /servlet/Test -e 200 -w 2 -c 4
}

I am having some difficulty in understand the -p and -I parameters. Why do we need -I which is the IP address of the host when we are passing the hostname in the $ARG1$. is it to bypass any local DNS resolution and enforce the IP address that is mentioned somewhere in the config?

Also, what does -P do? I thought -S is there to enforce https check

Krish

Have you read through /usr/local/nagios/libexec/check_http -h?

It's not necessary to use both -I and -H. -I is suggested to bypass DNS.

I'm not sure about the confusion about -P. It's for http POST. Lowercase -p is to specify a port number.

Perhaps I'm missing something in your question, so please rephrase the question if I haven't answered it. Thanks!

dwhitfield wrote:Have you read through /usr/local/nagios/libexec/check_http -h?

It's not necessary to use both -I and -H. -I is suggested to bypass DNS.

I'm not sure about the confusion about -P. It's for http POST. Lowercase -p is to specify a port number.

Perhaps I'm missing something in your question, so please rephrase the question if I haven't answered it. Thanks!

Hey,

would it cause some sort of confusion when there is both -H and -I parameters set in the command??

Also, I assume that -p option in that command is to force the port that is being passed in the argument rather than using the default SSL port 443.

Krish

You can test this out yourself by the following: Please read the output of /usr/local/nagios/libexec/check_http -h, this states the following:

-p, --port=INTEGER
Port number (default: 80)