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this case the LoadMaster closes the connection by sending a TCP RESET. If the server
fails to respond within the configured response time for the configured number of
times, it is assumed dead.
7 FTP
The LoadMaster opens a TCP connection to the Real Server on the Service port (port
21). If the server responds with a greeting message with status code 220, the
LoadMaster sends a QUIT command to the server, closes the connection and marks it
as active. If the server fails to respond within the configured response time for the
configured number of times or if it responds with a different status code, it is assumed
dead.
7 TELNET
The LoadMaster opens a TCP connection to the Real Server on the Service port (port
23). If the server responds with a command string beginning with the char ‘0xff’, the
LoadMaster closes the connection and marks the server as active. If the server fails to
respond within the configured response time for the configured number of times or if it
responds with a different command string, it is assumed dead.
7 SMTP
The LoadMaster opens a TCP connection to the Real Server on the Service port (port
25). If the server responds with a greeting message with status code 220, the
LoadMaster sends a QUIT command to the server, closes the connection and marks it
as active. If the server fails to respond within the configured response time for the
configured number of times or if it responds with a different status code, it is assumed
dead.
7 HTTP
The LoadMaster opens a TCP connection to the Real Server on the Service port (port
80). The LoadMaster sends a HTTP/1.0 HEAD request the server, requesting the page
“/”. If the server sends a HTTP response with a status code of 2 (200-299) the
LoadMaster closes the connection and marks the server as active. If the server fails to
respond within the configured response time for the configured number of times or if it
responds with a different status code, it is assumed dead.
7 HTTPS
The LoadMaster opens a SSL connection to the Real Server on the Service port (port
443). The LoadMaster sends a HTTP/1.0 HEAD request the server, requesting the
page “/”. If the server sends a HTTP response with a status code of 2 (200-299) the
LoadMaster closes the connection and marks the server as active. If the server fails to
respond within the configured response time for the configured number of times or if it
responds with a different status code, it is assumed dead.
7 POP3
The LoadMaster opens a TCP connection to the Real Server on the Service port (port
110). If the server respond with a greeting message that start with +OK, the
LoadMaster sends a QUIT command to the server, closes the connection and marks it
as active. If the server fails to respond within the configured response time for the
configured number of times or if it responds with a different status code, it is assumed
dead.
7 NNTP
The LoadMaster opens a TCP connection to the Real Server on the Service port (port
119). If the server responds with a greeting message with status code 200 or 201,
the LoadMaster sends a QUIT command to the server, closes the connection and
marks it as active. If the server fails to respond within the configured response time
for the configured number of times or if it responds with a different status code, it is
assumed dead.
7 IMAP
The LoadMaster opens a TCP connection to the Real Server on the Service port (port
143). If the server respond with a greeting message that start with “+ OK” or “* OK”,
the LoadMaster sends a LOGOUT command to the server, closes the connection and
marks it as active. If the server fails to respond within the configured response time
for the configured number of times or if it responds with a different status code, it is
assumed dead.
