Route Summarisation with EIGRP
KB ID 0001149 Problem I’ve already written a post that lets you calculate a route summarisation. So now you have a method of advertising your routes more efficiently, what do you do with it? Well I’m at the EIGRP point in my studies so here’s how to implement it with EIGRP. To demonstrate I’ve built the above network on GNS3, there is a loopback interface on the routers for each of those networks. Solution...
Safari – Open jnlp Files Not Download Them
KB ID 0001148 Problem Next to the rise of Nazism, war, hunger, and pestilence Java is the worst hing to happen to humankind! But because people keep using it for management consoles and things we are stuck with it. I’m particularly a big fan of the way they (Oracle) upgrade it because it’s got some huge security flaw in it, then all my remote iLO, DRAC and Cisco ASDM sessions don’t work anymore. It’s even...
VMware Fusion – Change IP Addresses
KB ID 0001147 Problem I use Fusion a lot, and it does what I want and never gives me any problems. I was working for a client this week and had to VPN onto their network (172.16.0.0/16 but all the servers were on 172.16.48.x). When connected I could not RDP to any of their servers? I asked a colleague to try on his laptop and it worked fine? I asked another colleague who also uses a mac, his worked as well. Solution I wondered if I...
OCSP Server – Bad Signing Certificate On Array Controller
OCSP KB ID 0001145 Problem I had a client ring in the other day, they have a three tier PKI solution on Windows Certificate Services, that I put in about a year ago, it has been running fine, but now they were seeing some errors. Bad signing certificate on Array controller. The following errors were also being logged; Event ID 23 Log Name: Application Source: Microsoft-Windows-OnlineResponder Date: 12/01/2016 08:44:01 Event ID: 23...
Certificate Services – Disable CRL Checking
KB ID 0001144 Problem Sometimes the services on your CA server will stop and complain about not being able to see your CRL, and some times the service will just refuse to start with the following error; The revocation function was unable to check revocation because the revocation server was offline. 0x80092013 (-2146885613 CRYPT_E_REVOCATION_OFFLINE). Solution OK the way to fix this permanently is to fix your CRL and make sure...
Deploying Windows ‘Web Application Proxy’
KB ID 0001142 Problem This is part of a larger piece of work Im putting together on publishing Remote Desktop Services with Microsoft Web Application Proxy. This article is simply to guide you though the process of installing the Web Application Proxy role. In a later article I will run though configuring it to work with Active Directory Federation Services, and Remote Desktop Services, to present secure RemoteApps. Solution Before...
Publishing Remote Desktop Services With Web Application Gateway
KB ID 0001143 Problem Getting this article to completion has been a bit of a journey! This is the final post that will stitch together all the others I’ve posted over the last couple of weeks, that will enable you to publish your RemoteApps with ‘Remote Desktop Web Access’, and have that service presented securely from your DMZ. I’ll be using Active Directory Federation Services, (you don’t have to, but...
Remote Desktop Web Access – Connection Error
KB ID 0001141 Problem Eleven days! That’s how long it took to fix this, after seven days, I bit the bullet and logged a call to Microsoft. I spent hours on the phone to the Remote Desktop Team, The Web Application Proxy Team, and the Networking Team. I replicated the error by building a complete new domain, PKI, ADFS, Remote Desktop Deployment and Web Application Proxy Server. Then today I got a call from the...
Installing vSphere VI Client on Server 2012 Fails – Error 28173
KB ID 0001139 Problem If you attempt to install the VI client, (in this case on a 2012 R2 Datacenter Server), you may see this error; Error 28173. Setup failed to enable Microsoft .NET Framework 3.5 Refer to Microsoft KB article 2734782 and 3002547 which may help you resolve the .NET failure. You will need to enable this feature in Windows Server Manager before installing vSphere Client. Solution I’ve had problems with .NET on...
Network Summarisation – Exam Technique and Examples
KB ID 0001138 Problem Note: Yes I’m spelling Summarisation with an ’S’ I’m English. Most examples I’ve seen on this give you a bunch of subnets then ask you to come up with a summary route for all of them, (that’s kind of the point of route summarisation, I’ll grant you). However in an exam with a laminated board and the dodgy permanent pen they give you to make notes with, are you seriously expected to...