Alteon Application Switch Operating System Application Guide
Health Checking
490
Document
ID:
RDWR-ALOS-V2900_AG1302
SMTP Server Health Checks
Simple Mail Transfer Protocol (SMTP) is a protocol to transfer e-mail messages between servers
reliably and efficiently. This protocol traditionally operates over TCP, port 25 and is documented in
RFC 821.
The SMTP health check attempts to verify specified user name validity on the SMTP server. The
username configuration is mandatory. An Inherit value can be configured to allow the user name
configuration via group content.
A pre-defined smtp health check is available for simple SMTP service monitoring. The health check
has the Username parameter set to Inherit, allowing definition using the group content and the
destination port set to standard SMTP port (25).
IMAP Server Health Checks
Internet Message Access Protocol (IMAP) is a mail server protocol used between a client system and
a mail server that allows a user to retrieve and manipulate mail messages.
The IMAP health check monitors service availability by attempting login to the IMAP server and
requires username and password configuration (mandatory parameters). An Inherit value can be
configured for the two parameters to allow the user name and password configuration using the
group content (content includes user:password).
Note:
If the username and password are set to Inherit but the group content is empty, the health
check performed for that group is TCP.
A pre-defined imap health check is available for simple IMAP service monitoring. The health check
has the Username and Password parameters set to Inherit, allowing definition using the group
content and the destination port set to standard IMAP port (143).
NNTP Server Health Checks
Net News Transfer Protocol (NNTP) specifies a protocol for the distribution, inquiry, retrieval, and
posting of news articles using a reliable stream-based transmission of news among the
ARPA-Internet community. NNTP is designed so that news articles are stored in a central database
allowing a subscriber to select only those items he wishes to read.
NNTP is documented in RFC 977. Articles are transmitted in the form specified by RFC 1036.
NNTP health check monitors service availability by attempting to retrieve the identification line of
the specified Newsgroup Name (mandatory parameter) from the server. An Inherit value can be
configured to allow the newsgroup name configuration using the group content.
Note:
If the Newsgroup Name is set to Inherit but the group content is empty, the health check
performed for that group is TCP.
A pre-defined nntp health check is available for simple NNTP service monitoring. The health check
has the newsgroup name parameter set to Inherit, allowing definition using the group content and
the destination port set to standard NNTP port (119).
RADIUS Server Health Checks
Alteon lets you use the Remote Authentication Dial-In User Service (RADIUS) protocol to health
check the RADIUS accounting and authentication services on RADIUS servers. RADIUS is stateless
and uses UDP as its transport protocol.
