Can you Use ‘Let’s Encrypt’ on Hybrid Exchange?
KB ID 0001770 Problem A few months ago I wrote an article about getting free exchange certificates with Lets ‘Encrypt’. And that still works peachy, I implemented it on my test Exchange 2019 server (in Hybrid mode) and all appeared well. Some time later, (remember this is my test network so it’s not in production.) I noticed that mail was not getting forwarded from O365 to the on premises Exchange server. I’ve...
Exchange Stopped Working?
KB ID 0001749 Problem I see various posts in online forums, and the process is held up because a lot of techs can’t do basic troubleshooting on their Exchange deployments. So I thought I’d put together some basic ‘first steps’ for you to do when your ‘Exchange Stopped Working’ This way you can at least get an error code to search for or a better idea of what’s going on. Exchange Stopped...
Software is Preventing Firefox From Safely Connecting to this Site
KB ID 0001727 Problem I was setting up some HTTPS/SSL inspection this week and while testing it, I ran into this problem; Firefox Certificate Settings So the machine I’m using DOES trust the CA that issued that certificate, (it’s a FortiGate firewall) But the BROWSER does not. (Firefox maintains its own list of certificates, and more importantly which CA certificates it will trust). Essentially the browser is trying to...
Cisco ASA: Received a DELETE PFKey message from IKE
KB ID 0001720 Problem I was debugging a VPN tunnel today. (From a Fortigate to a Cisco ASAv). I was messing around with the encryption and hashing, when the tunnel fell over. Phase 1 was establishing fine but not Phase 2 (IPSEC). I’ve got better skills on the ASA, so that’s where I was debugging; IPSEC: Received a PFKey message from IKE IPSEC: Parsing PFKey GETSPI message IPSEC: Creating IPsec SA IPSEC: Getting the...
AnyConnect Error: Unable To Verify IP Forwarding Table Modifications
KB ID 0001646 Problem While attempting to connect to a clients AnyConnect, this happened; The VPN client was unable to successfully verify the IP forwarding table modifications. A VPN connection will not be established. Or on older clients, you may see; The VPN client was unable to modify the IP forwarding table. A VPN connection will not be established. Please restart your computer or device, then try again. Solution I was trying to...