VMware Upgrading the vSphere Virtual Center Appliance
KB ID 0001193 Problem I had a vCenter 6.0.0.1 appliance on my test network and wanted to update it to version 6.0.0.2. But I didn’t want to reinstall the whole thing from scratch. Solution Let’s assume it’s going to go wrong! Take a snapshot off the appliance first. Go to the patch update site and get the latest patch for your version of vCenter. Upload the ISO file into your vSphere storage, and present it to your...
Citrix NetScaler – SSL Offloading
KB ID 0001192 Problem What is SSL Offloading? If you run https services (Note: I say services, this does not have to be a website), the actual security is handled by SSL/TLS, one of the things this does is encrypt the traffic between the client and server. (This is why your online banking and shopping is done over https and not http.) Thats great, but encrypting and decrypting all that traffic takes a lot of processing cycles, if you...
Citrix NetScaler – ‘Certificate is not a server certificate’
KB ID 0001191 Problem While attempting to bind a certificate to a Virtual Server on my NetScaler this happened; Error Certificate is not a server certificate Solution Before you proceed, delete the problem certificate to avoid confusion! I had generated this certificate with Microsoft Certificate Services, and I had made a wildcard certificate like so; Certificate Services – Create a ‘Wildcard Certificate’ Remember if you use the...
NetScaler – SSL Virtual Server State: Down Effective State: Down
KB ID 0001190 Problem When trying to setup SSL Offloading on a NetScaler Virtual Server. I was unable to get the State and Effective State to ‘go green’. Solution If you hit the ‘down arrow’ to the left it will give you a little more information, it also says ‘SSL feature disabled’. Log directly into the appliance and issue the following command; enable feature SSL Hit the ‘refresh’...
Firefox Error – SSL_ERROR_WEAK_SERVER_EPHEMERAL_DH_KEY
KB ID 0001189 Problem Firefox is what I use when Opera does not work, so when I tried to connect to some management servers that did not support Opera this happened; Secure Connection Failed An error occurred during a connection to {FQDN). SSL received a weak ephemeral Diffie-Hellman key in Server Key Exchange handshake message. (Error code: SSL_ERROR_WEAK_SERVER_EPHEMERAL_DH_KEY) Solution Navigate to ‘about:config’...