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Using RADIUS with AD FS MFA
Active Directory Federation Services, AD-FS, is the de facto identity provider in a Microsoft environment. Many organizations will be using it to authenticate Office 365 users to an on-premise Active...
View ArticleExtract private key from Cisco private-config
This blog post discusses extracting a private key from Cisco IOS’s private-config file. I recently generated a keypair on an IOS router and had forgot to flag it as “exportable”, making it difficult to...
View ArticleOffice 365 “A local loop was detected”
Yesterday I encountered a problem with an Office 365 hybrid environment where mail suddenly began looping back and forth between the on premise environment and office 365 for all remote mail users. No...
View ArticleOpenSource PHP Class for working with Hikvision cameras
Earlier today I released an open-source (GPL 2) PHP class for interacting with Hikvision IP Cameras, you can find the code on GitHub. The PHP Class works with Hikvisions IP Camera index files which get...
View ArticleGetting started with DN42
A week or two ago I became aware of DN42, a private network run to teach people how to use BGP. DN42 users connect to each other using site-site VPNs and then use BGP to exchange routing information....
View ArticleLog-off terminal services session remotely
There are times when you want to quickly log-off a number of terminal services sessions without having to log on to the server itself, perhaps because of the following error: The terminal server has...
View ArticleFaster than Gigabit on a budget
For some time now Gigabit has been the de-facto speed for networking equipment. The days of vendors getting away with selling Gigabit at premium is mostly gone. The only real exception to that seems to...
View ArticleConfigure Cisco IOS DHCP to use vendor class IDs
The IOS DHCP server can be configured to provide different address information to clients based on information they provide via DHCP option 60. DHCP Option 60 is the “vendor class identifier option”...
View ArticleShrink a thin-provisioned VMDK
If you’ve thin-provisioned a VMDK under ESXi and need to reduce it for whatever reason, the official VMware documentation suggest to migrate the VM to another datastore using VMware converter which is...
View ArticleCisco Device Info now open source
Cisco Device Info, my popular SNMP application for getting information from Cisco network devices has now been released as free software. It is now free to use at home, and in commercial environments....
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Controlling a British Gas WR1 Receiver with an Arduino
Over the holiday season I started looking at whether my boiler, a Worcester Bosch Greenstar 28i, was compatible with the Nest thermostat. After some Googling I began to wonder whether I could make my...
View ArticleComplaining to CISAS about your ISP
Earlier this year I moved home, unfortunately during the process of installing a new telephone line a problem arose that led to me lodging a formal complaint with my ISP. After a few months this...
View ArticleCisco 2960X Failed to send hrpc non blocking message
In deploying a number of Cisco 2960X Switch Stacks containing between 4 and 8 members I’ve observed the following error message logged: Failed to send hrpc non blocking message The issue appeared after...
View ArticleCisco ASAv on ESXi Standalone
Cisco released their new ASAv virtual appliance, an updated virtual offering for the ASA platform. I suspect at least part of the driver for this is their work on Cisco Modeling Labs, a new tool to...
View ArticleHow To – Enable Wake On Lan using a Cisco ASA
I wrote instructions for how to configure Wake On Lan forwarding using a Cisco IOS device, this article will focus on how to configure a Cisco ASA firewall. Wake On LAN is an Ethernet standard that...
View ArticleZyxel GS1910 Fan Replacement
Not too long ago I purchased a Zyxel GS1910-24HP for my home network. It suited my requirements well (12-24 ports, PoE, Gigabit, Rack-mountable and manageable). Unfortunately once I got it powered up I...
View ArticleSanitising an EMC Clariion
I’ve recently completed a project to replace an old CX4-120 with a newer VNX series SAN. EMC charge an arm and a let for their sanitisation process, so after looking into the process I decided to go...
View ArticleCisco time synchronisation & summer time
Having accurate time configured on Cisco routers is important, if for nothing else being able to look through log files and understand when something happened is imperative. Configuring time on Cisco...
View ArticleConvert Cisco Lightweight AP to Autonomous
I recently picked up two AIR-LAP1142N access points from eBay that had previously been used with a Cisco Wireless LAN controller. As such they were configured with CAPWAP and do allow for independent...
View ArticleBrocade Java Problems
Brocade Fiber Channel switches running FabricOS, in particular the DS-300B switches suffer from problems when trying to make use of the web based Switch Explorer. This usually results in getting an...
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