Understanding Testing Methods for Services and Real Servers

TCP Port Check

For Services specified with TCP-based ports, the Service Monitor validates that the port is open. For UDP-based Services and Services defined with "ALL" ports, the Service Monitor performs a PING test.

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UDP Port Check

Check if the UDP port is open by sending a 0 byte datagram to the Real Server IP address and port. This test depends on receiving an "ICMP Port Unreachable" message to determine the result. If there is a firewall that prevents outbound ICMP messages, the test assumes that the port is open.

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HTTP

Performs an HTTP GET request to the specified URL. The Real Server is used as a proxy server to retrieve the page, so the forward proxy setting on the Real Server must be enabled.

Enter the complete URL starting with "http:"

Enter a pattern expected in the resulting HTML.

Simple HTTP

Performs an HTTP GET request to the specified relative URL on the Real Server being tested. The actual URL used is http://[real_server_ip]:[port][URL]. You can also specify additional headers to be sent with the HTTP request in the format Header1:Value1, Header2:Value2, etc. Make sure to specify the expected HTTP response status code when accessing the URL as any other status code will be considered an error.
Recommended: 200

Enter the root relative URL (such as /cgi-bin/index.cgi).

Enter a pattern expected in the resulting HTML.

Simple HTTPS

Same as Simple HTTP test but using SSL. The actual URL used will be https://[real_server_ip]:[port][URL].

Enter the root relative URL (such as /cgi-bin/index.cgi) in the Test Target box.

Enter a pattern expected in the resulting HTML.

HTTPS Test

Performs an HTTPS GET request to the specified URL. The Real Server is used as a proxy server to retrieve the page, so the forward proxy setting on the Real Server must be enabled.

Enter the complete URL starting with "https:"

Enter a pattern expected in the resulting HTML.

DNS

Sends a DNS query to retrieve the IP address of the specified hostname. This value is compared to the IP address in the Test Match box.

Enter a fully qualified hostname in the Test Target box.

To validate resolution to a specific IP address, enter that IP in the Test Match box.

IMAP

Simple Test for IMAP service. If no username and password are provided, this test verifies availability of the IMAP service on the Real Server.

Optional. Username to log in as.

Optional. Password to use.

POP

Simple Test for POP service. If no username and password are provided, this test verifies availability of the POP service on the Real Server.

Optional. Username to log in as.

Optional. Password to use.

SMTP

Simple Test for SMTP service.

Enter the domain for the mail server to be tested.

Optional. Enter a pattern that is expected in the banner of the SMTP Server.

SNMP

Do an SNMP GET using the OID in the Test Target box, and match the response to the pattern in the Test Match box. If the Test Target box is empty, the test checks if the SNMP is available on the Real Server.

Optional. Enter a valid SNMP OID in the Test Target box.

Optional. Enter a pattern to match in the response.

SIP

Simple Test for SIP service. This test sends an OPTIONS packet to the SIP server to check availability of the SIP service.

n/a

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LDAP/AD

Bind Test for LDAP/AD service. If no username and password are provided, the LDAP/AD test verifies availability of the anonymous user.

Optional. Username with full LDAP schema.

Optional. Password to use.

LDAPS/AD

Bind Test for LDAPS/AD service. If no username and password are provided, the LDAPS/AD test verifies availability of the anonymous user.

Optional. Username with full LDAP schema.

Optional. Password to use.

Barracuda Spam Firewall

The Barracuda Load Balancer IP address must be exempted from any Rate Control settings on the Barracuda Spam Firewall.

Enter the domain for the mail server to be tested.

Optional. Enter a pattern that is expected in the banner of the SMTP Server.

Always Pass

This test is used for troubleshooting or for services used for management access to Real Servers. This test always passes regardless of the condition of the Real Server.

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Specific HTTP Port

Performs an HTTP GET request using a specified port to a relative URL on the Real Server being tested. The URL used is http://[real_server_ip]:[port][URL].

Enter the TCP port followed by a ":" and the root relative URL (e.g. 8080:/cgi-bin/index.cgi)).

Enter a pattern expected in the resulting HTML.

RADIUS Auth

Tests the availability of a RADIUS server.

Enter the secret to use with the RADIUS server.

Enter a username and password separated by "|". Example: username|password

RADIUS Acct

Tests the availability of a RADIUS server by making an accounting request.

Enter the secret to use with the RADIUS server.

Enter a username and password separated by "|". Example: username|password

RDP Test

Attempts an RDP connection to each Real Server to check the availability of the Terminal Service.

Enter the port on the Real Server to use, if different than the port specified on the Real Server Detail page.

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FTP Test

Attempts a TCP connection to each Real Server to check FTP availability.

Optional. Username.

Optional. Password.

FTPS Test

Attempts a TCP connection to each Real Server to check FTPS availability.

Optional. Username.

Optional. Password.