Upgrade Ubiquiti UniFi Access Points (WAP) now to avoid KrackAttack

On October 15, 2017, security researcher Mathy Vanhoef announced the discovery of KrackAttacks, a serious flaw in the WPA2 encryption protocol that encrypts most WiFi connections. Using this method, an attacker can decrypt traffic from almost any wireless access point (WAP) and clients.¬†Every WiFi access point will need to be upgraded with patch that prevents … Continue reading Upgrade Ubiquiti UniFi Access Points (WAP) now to avoid KrackAttack

Advertisements

Warning: CentOS/RedHat 7.4 installs FreeRADIUS 3 with breaking changes

When you run yum upgrade on a CentOS/RedHat 7 instance, you will be upgraded to 7.4. If you have a FreeRADIUS server, you will be upgraded from version 2 to 3, and your server will likely stop authenticating! Good times! Fortunately, the solution was not complicated for us, because we had good documentation. Symptoms Your … Continue reading Warning: CentOS/RedHat 7.4 installs FreeRADIUS 3 with breaking changes

Managing persistent disks on Google Compute Engine

It can confusing when you have multiple persistent disks on an instance running on Google Compute Engine. For example, a server may have separate disks for the filesystem root, MySQL data, logs, and /tmp. Once you've created the Compute Engine disks and attached each one to the instance, how do you know which Compute Engine … Continue reading Managing persistent disks on Google Compute Engine

Migration from GoDaddy to WordPress.com hosting

I've migrated my blog from GoDaddy to a paid plan with WordPress.com. I decided to trade flexibility for simplicity, since I don't want to spend time fiddling around with the administration of this site. When I spend all day on IT, doing IT for a blog is no longer on my list of hobbies. With … Continue reading Migration from GoDaddy to WordPress.com hosting

Is there a “Primary Domain Controller” in Active Directory?

The Historical Answer With Windows NT, prior to the advent of Active Directory, there was one Primary Domain Controller (DC) per domain, and every other DC was a Backup. The Modern Answer When Active Directory was introduced with Windows 2000, domain controllers became fully multi-master. There is no primary domain controller. However, there are two … Continue reading Is there a “Primary Domain Controller” in Active Directory?

Synology DiskStation DS1515+ Review

Summary: The Synology DS 1515+ is a capable little NAS with a large feature set, but it has some software reliability issues and limited technical support. Hardware The DS1515+ is a compact unit that feels sturdy. It holds five 2.5" or 3.5" drives, and 3.5" drives can be installed without any tools. You will need … Continue reading Synology DiskStation DS1515+ Review

anacron run-parts generates invalid or malformed syslog messages

On RedHat and CentOS 6 and 7, anacron generates syslog messages that are mangled when they are forwarded by rsyslog. I found the cause and a solution in a comment by Tomas Heinrich on this old Fedora bug. Sadly, that bug was closed instead of getting fixed, probably because Fedora is oriented toward desktop users … Continue reading anacron run-parts generates invalid or malformed syslog messages

Failed to schedule Software Protection service for re-start: Error Code: 0x80041316

This post documents how to resolve the following error message, which may appear for no particular reason, and flood the Windows event log: Failed to schedule Software Protection service for re-start at 2116-09-14T16:54:27Z. Error Code: 0x80041316. The following steps will resolve the error on Windows Server 2012r2, but based on other links, similar steps should … Continue reading Failed to schedule Software Protection service for re-start: Error Code: 0x80041316

Making Windows work for Linux and OS X admins

If you are a Linux or OS X power user, then you're used to having all the necessary tools built into your OS. When you log into a Windows system (What! No command line?) you may feel lost. These tools and shortcuts will help you be productive on Windows systems. Windows Shortcuts Alt-x is a … Continue reading Making Windows work for Linux and OS X admins