SENA STS Series - Manual (Page 34)

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Figure 3-11 Web server configurations
The Web page refresh rate can be also adjusted in this configuration page. The refresh rate is only
applicable to the system statistics pages, such as network interfaces, serial ports, IP, ICMP, TCP and
UDP. Other pages in the Web interface are not refreshed automatically. For more information about
the system statistics, please refer to section 7 System Statistics.
On this configuration menu page, users can select default web page that will pop up after user logs in
to the Web UI. Factory default is Configuration page and user can changes this to Customer page.
After selecting Default web page as Customer page, user can set Customer web start page as one of
HTML(index.html) or CGI(default) which are located under /usr2 directory. User can change or modify
these files for his own purpose. For anonymous access to the customer page without user ID and
password, disable the customer page authentication feature. For more information about customizing
user web page, please refer to 9.3 User Defined Web Pages section.
3.10. TCP Service Configuration
If a TCP session is established between two hosts, it should be closed (normally or abnormally) by
either of the hosts to prevent the lock-up of the corresponding TCP port. To prevent this type of lock-
up situation, the STS Series provides a TCP “keep-alive” feature. The STS Series will send packets
back and forth through the network periodically to confirm that the network is still alive. The
corresponding TCP session is closed automatically if there’s no response from the remote host.
To use the TCP “keep-alive” feature with the STS Series, the users should configure three parameters
as follows:
 TCP keep-alive time:
This represents the time interval between the last data transmission and keep-alive packet
submissions by the STS Series. These “keep-alive” messages are sent to the remote host to confirm
that the session is still open. The default time value is 15 sec.