Cisco 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....
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 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 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 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 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 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 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 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...
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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...
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