Models 707B and 708B Switching Matrix Reference Manual
Section 8: Troubleshooting guide
707B-901-01 Rev. A / August 2010
8-7
Open ports on firewalls
A firewall is a part of a computer system or network that is designed to block unauthorized access
while permitting authorized communications. It is a device or set of devices that are configured to
permit or deny applications based on a set of rules and other criteria.
If you have a firewall in the network between your computer and the instrument, you need to make
sure the following ports are opened for UDP and TCP packets:
•
Port 80: Web server. This is normally open.
•
Port 1024: VXI-11 connection for sending and receiving commands from the instrument.
•
Port 5025: Raw socket connection for sending and receiving commands from the instrument.
Web page problems
All LXI instruments have a web server. The LAN configuration information on these pages is
mandated by the LXI consortium. For Keithley’s LXI instruments, the standard LXI pages use
standard HTML.
The added value pages that Keithley has added to control the instruments use Java. If Java is not
installed when you select one of these instrument-specific web pages, the web page prompts you to
install it. To do this, your computer must have access to the Internet so it can access the web browser
plug-in Sun Java Runtime Environment Version 6 or higher. Installation files are available at the
When you connect to the instrument web page for the first time, several things can happen:
•
If the security settings are high, scripting might be disabled and the browser will prompt you to
enable ActiveX and scripting.
•
If Java is not installed, the browser will prompt you to install it and provide a link to the download.
If you do not have an Internet connection, you must download it elsewhere and install it on the
computer that it connected to the instrument.
•
When the Java applet from the instrument gets downloaded into the browser it will ask you if you
trust this active content from Keithley Instruments. Select Yes.
If you have resolved the problems, the instrument control pages should work and if you try to perform
an action, such as closing a relay, you are prompted for the password (the default is “admin”).
NOTE
If you update the firmware for the instrument using the web page (not available for all instruments),
you need to flush the browser cache so that a fresh Java Applet gets downloaded the next time you
access the web page.
