Article Archive

Microsoft Windows 10 Release

Microsoft has released Windows 10, which is available as a free upgrade for users of Windows 7 and Windows 8.1. Windows 10 is also available to Caltech students through the Microsoft DreamSpark program ( Faculty and staff may download Windows 10 from the webstore.

Please note that Windows 10 is a major product release that includ...

Online W2 Maintenance Schedule

IMSS will perform maintenance on the Online W2 system on the dates listed below. During these times, Onliine W2 will be intermittently available. If you encounter any problems, please try your transaction again at a later time. For questions or concerns, please contact the Help Desk (x3500,,

  • Saturday, July 25 from 4:00AM to 1...

Updates to Data Network Refresh Schedule

The campus network refresh project is well underway and will continue into 2016. IMSS has recently completed upgrades to Keck Lab, Sherman Fairchild Library, and Spalding Lab. For more information about the network refresh project and schedule, please visit

IMSS recommends upgrading Eudora email clients

After a recent update to campus email, the Eudora email client is no longer compatible with the standard UNIX mail system. Customers using Eudora may no longer be able to access their mailbox. Since the latest version of Eudora was released in 2006, it is unlikely that we will find a solution for customers to continue to use Eudora. IMSS instead suggests upgrading to Beware Fake IRS Emails

Tax time brings IRS scam email messages.  A variety of scams are circulating in email right now purporting to be important messages from the IRS.  Be very suspicious of any incoming email message that claims to be from the IRS, particularly if it includes an attached document.  One current example is a message claiming to provide information about a tax refund, in the form of ...

Don't Be Fooled By Messages Asking For Your Caltech Username And Password

Many campus users are receiving email claiming to come from an IT support group (sometimes even IMSS or the Help Desk), asking for the user's password and other private information, or requesting that you "verify your account" by logging into a website. Please be aware that this is a form of security attack known as "phishing" designed to fool users into giving their ...

Java 8 Update Information

Java users may have recently auto-updated or received prompts to update from Java 7 to Java 8. Though Java 8 is currently the default version on, Caltech users may want to reconsider updating to Java 8 due to compatibility issues with some applications. If the Caltech administrative applications are an integral part of your workflow, IMSS does not recommend updating at this t...

Red Hat Proxy transitioning to Satellite on 2/9/2015

Effective February 9, 2015, the IMSS-run proxy server which registers campus Red Hat systems to receive updates will be retired and transitioned to a new Satellite server. In order to continue to receive RHEL updates, you will need to download a new script to register your systems to receive updates. 

Instructions on how to obtain this new script can be found on the Caltech soft...

Order Adobe CS6 software by February 23rd

Adobe will discontinue CS6 sales at the end of February. The last day to order Adobe CS6 products from the webstore will be February 23rd.

Update your Matlab license file

Effective 12/12/2014, IMSS retired the long-running Matlab triad license servers. If you are using a network installation of Matlab, please update your license file. This will ensure that your Matlab network installation accesses the new replacement license server. For instructions on how to obtain and update this license file, Bash "shellshock" vulnerability

A security problem with Bash was publicly disclosed on Wednesday, 9/24. Bash is a very popular operating system component known as a "shell" that comes with all versions of Linux and Mac OSX, as well as other systems. While this vulnerability has been present for many years, it was only discovered recently. As soon as IMSS became aware of the problem on 9/24, core IMSS sy...

IMSS recommends updating Java

Microsoft's recent Windows updates include an update to Internet Explorer that blocks older versions of Java. If you encounter issues using Java-dependent applications after applying this Microsoft update, please update your version of Java. Instructions on how to download and install Java can be found at

Additionally, IMSS recommends downloading...

RedHat Proxy Certificate Update

Caltech's RedHat certificate has expired. To resolve this, RedHat users should run the following command to get the updated SSL certificate:

curl -o /usr/share/rhn/RHN-ORG-TRUSTED-SSL-CERT

Beware Fake Microsoft "Tech Support" Phone Scams

Some campus customers are receiving calls from people claiming to be from Microsoft regarding a supposed computer problem. The callers offer to fix the problem and request remote access to the customer's computer. This is a very common scam with typical goals of installing malicious software on the victim's computer, or obtaining the victim's credit card number (to pay for the un...

Improvements for identifying spam email

IMSS has recently implemented a few changes to our spam tagging service. The word SPAM is now prepended to subject lines for spam tagged messages, which will make it easier to see that a message has been given a score that indicates it is likely spam. We also have a new rule that spam tags messages that originate from off campus, but claim to be from the IMSS Help Desk. This will also make i...

Mailman mailing lists moved to

IMSS has moved Mailman mailing lists to new infrastructure. Mailman's functionality and look and feel remain the same, however mailing list locations (URLs) have changed to with the list name appended. While website redirects have been set up so that old links continue to work, we encourage you to update your links and saved bookmarks. If you have any questions...

Matlab License Renewal

Standalone Matlab licenses expire annually on December 1. To renew your standalone Matlab license for another year, follow these instructions.

Start the activation client:

  • On Windows, go to the Start menu to the All Programs list. Select MATLAB, the MATLAB release, and then select the "Activate MATLAB" link. NOTE: We recommend starting Matlab in "ad...

IMSS recommends updating to Java 7

Several of the applications that IMSS maintains will soon be optimized to use Java 7. IMSS urges you to update to the latest version of Java 7 immediately to avoid problems with using these Java-dependent applications, as well as protect your computer from using older and insecure versions of Java. Instructions on how to download and install Java 7 can be found at Protect against CryptoLocker & other malware

There has been a recent resurgence of a type of malicious ransomware software known as "CryptoLocker." The CryptoLocker family of malicious software arrives as an email message that is intended to look like legitimate email from a known sender. The message includes a .zip attachment containing a Windows program disguised as a PDF that, when opened, will encrypt files on the victim&...

Red Hat updates are available

IMSS has resolved the issues with obtaining Red Hat updates. As of 10/17, Red Hat updates are available. If you are still unable to receive updates, please submit a support request at (request type IMSS > IO Applications - UNIX/Linux).

Time Keeping (Kronos) Limited x96 More Compatible & Secure

Due to serious security and compatibility issues with Java, IMSS recommends using Time Keeping (Kronos) Limited instead of regular Time Keeping (Kronos). Time Keeping Limited, the lighter version of Time Keeping, does not require Java and is compatible with all common operating systems and browsers. Time Keeping Limited can also accomplish the same common tasks and functions as regular Time ...

IMSS Help Desk has moved

Effective Monday, February 25th, the Help Desk and Hardware Repairs are now located in Central Engineering Services (building 85.) The Help Desk is located in Room 204 and Hardware Repairs is in Room 109. Also note that our new mail code is 200-85.

Find My iPhone

IMSS recommends using the "Find Me" function in iCloud to be able to locate your Apple mobile devices in the event they are lost or stolen. For information on how to set this up, visit

Microsoft Office 2013

Microsoft Office Professional 2013 is now available for download from Please note that Office 2013 is a major product release that include significant changes to the user interface, functionality, application/document compatibility and system performance. IMSS always aims to help our customers avoid complications that could inte...

Serious Java 1.7.x Vulnerability

A serious vulnerability has been found in Java 1.7, which allows execution of arbitrary code on the victim's computer. All that is necessary for exploitation to occur is to inadvertently visit a malicious website using a browser with Java 1.7.x enabled.

Oracle has released a new update to address this security issue, Previous Page 2 of 5. Next