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Chapter 4: Configuring the High-Level Network

4-142

Using https

The https template is for Hypertext Transfer Protocol Secure. An https

monitor attempts to receive specific content from a web page protected by

SSL security. The check is successful when the content matches the recv

expression. An https monitor uses a send string, a recv expression, and a

username and password (If there is no password security, use blank strings

[""] for username and password.) The optional get statement replaces the

send statement, automatically filling in the string "GET". Thus, the

following two statements are equivalent:

send "GET/"

get "/"

The optional url statement takes the HTTPS URL as a value and

automatically fills in the dest value with the address the URL resolves to.

Working with templates for EAV monitors

EAV monitors verify applications on the node by running those applications

remotely, using an external service checker program located in the directory

/user/local/lib/pingers. These include ftp, pop3, smtp, sq., nntp, imap,

ldap, and radius. Also included is the template external, which has a run

attribute to specify a user-added external monitor.

Using ftp

The ftp template is for File Transfer Protocol. The monitor attempts to

download a specified file to the /var/tmp directory. The check is successful

if the file is retrieved. The ftp monitor takes a get statement, username, and

password. The get statement takes the full path to the file as a value. The

optional url statement may be used in place of get. The url takes the FTP

monitor https {

#type https

interval 5

timeout 16

dest *:*

send "GET /"

recv ""

//get

//url

username ""

password ""

}

Figure 4.58 The https monitor template

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