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Tip of the Month: Protecting Laptops At Airport Security Checkpoints

Travelers going through airport security checkpoints these days need to take their computer laptops out of their cases and place them separately on the conveyor belts of the airport X-ray machines. To protect the machines from damage, airline experts suggest you take these steps.
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Library, Networking Staff Team Up to Make On-Line Journals Available from Off Site

The Lab Library has a growing number of on-line journals available to staff, but access to these publications by employees off site was a problem. The Library staff wanted to know how off-site users, who are sometimes thousands of miles from the Lab, could obtain a Lab IP address to allow access to the journals. Here's how.
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Dec. 4 Linux Users Group Meeting to Focus on Evil Hacker Tactics and Methodologies

Rick Moen of will be the featured speaker at the next meeting of the Lab's Linux Users Group. The meeting will start at noon Tuesday, Dec. 4, in Perseverance Hall and all interested employees are invited. Moen, who describes himself as a "recovering sysadmin, working with Linux, WANs/LANs, and sundry network servers in the San Francisco Bay Area," will discuss "Attacking Linux -- Linux/Unix Hackers Methodologies Revealed!"
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Attention Non-IMAP Email Users: Off-Site Authentication Procedure to Be Reinstated Beginning Saturday, Dec. 1

If you are NOT a user of the Lab's centralized IMAP4 email system and you use the Lab's central outgoing e-mail server to send email while offsite, you will again have to log in to the server and authenticate your identity once a week, beginning Dec. 1. This authentication requirement had been temporarily turned off while IMAP email accounts were being moved from one to several servers. This change affects only those employees who do not use the IMAP email and who use the Lab's email servers to send mail from offsite. Previously, users had to authenticate themselves daily, but the new procedure will only require once-a-week authentication.

To authenticate your identity, you will need to successfully enter your LDAP username and password at This will provide outgoing e-mail service from offsite until the next Sunday, when you will need to renew your authentication. If you do not have an LDAP username and password, or need further assistance, contact the computer support Help Desk at X4357.

Course on UNIX Security to Be Presented Wednesday, December 5

UNIX system administrators and users--is your UNIX system secure enough to be able to withstand the many kinds of attacks that are launched against UNIX systems? To help you in your effort to achieve security in UNIX systems, the LBNL Computer Protection Program is sponsoring a full-day course on UNIX security.
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Computer Protection Program Warns: Beware of Bogus Security Information

A considerable amount of bogus information about security threats and solutions is constantly being distributed on the Internet. Remember the warning about the "Budweiser frogs sceensaver" that circulated around the Internet several years ago? This warning, which proved to be a hoax, claimed that if you downloaded this screensaver, your system's hard drive would be erased.
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Cybersecurity tip: Practical advice for securing your system now on the Web

Appropriately configuring system auditing and examining its output are two of the most important steps you can take in securing your system. A new posting on the Computer Protection Program web site describes practical steps you can take to make auditing work for you in UNIX, Linux, Windows NT and Windows 2000 systems. See

Microsoft Releases Cumulative Patch for Fixing Internet Explorer Vulnerabilities

Tired of patching your Internet Explorer (IE) browser? Microsoft has released a cumulative patch for IE 5.5 (with Service Pack 2) and IE 6.

This cumulative patch obviates the need to install one patch, then another, although this cumulative patch does not work for other versions of IE.

Monthly Virus Update: BADTRANS.B, ALIZ, KLEZ

This is the latest installment of a new series of monthly updates on computer viruses. The information is provided by the Lab's Computer Protection Program. The viruses described below are all being blocked by the Lab's "virus wall," which scans all incoming email with "" addresses for viruses. Employees who maintain their own Lab email servers should check to ensure that these systems have updated antivirus software.
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Computing News is maintained by Jon Bashor.