Cluster: Not Reachable On UDP Port 3433
KB ID 0001621 Problem Seen on a Microsoft Hyper-V failover cluster (Server 2019); Network Interfaces {Node-Name} {Interface-Name} and {Node-Name} {Interface-Name} are on the same cluster network, yet address {IP-Address} is not reachable from {IP-Address} using UDP port 3433 Solution I’ve seen this error before, and usually you just need to disable the firewall or open UDP port 3433 and then re-validate the cluster (job done)....
Windows Adding Firewall Rules With PowerShell
KB ID 0001538 Problem There was a question on Experts Exchange this morning, the asker wanted to be able to add a ‘Trusted’ network range to their Windows Server Firewall settings as a ‘allow all ports’ rule. Solution You can of course add this manually in the GUI, normally I’d simply Add a Firewall Rule with a Group Policy. but the problem with that is, that’s fine if you want to open a particular...
PDC Emulator: Cannot Sync Time From External NTP Server
KB ID 0001464 Problem I was involved in a question on Experts Exchange this week where the asker could not get their PDC to sync time from an external NTP server. He was seeing an Event ID 12 Error; Time Provider NtpClient: This machine is configured to use the domain hierarchy to determine its time source, but it is the PDC emulator for the domain at the root of the forest, so there is no machine above it in the domain hierarchy to...
Draytek Vigor Router Port Forwarding
KB ID 0000425 Problem This procedure was carried out on a Draytek Vigor 2800 Router, for this I needed to forward RDP (That’s on TCP Port 3389). Warning: If you need to forward any of the following ports 23 (Telnet), 80 (HTTP) , 443 HTTPS/SSL), 21 (FTP), or 22 (SSH). The Draytek has these reserved for remote management. You will need to change the port number (system Maintenance > Management > Management Port Setup)....
Access a Windows Share Through a Firewall
KB ID 0001061 Problem I needed to access a folder on a server in a clients DMZ the other week, and the thought struck me ‘I have no idea what ports I need to open to accomplish this?’ Solution Bear in ming I’m just talking about the ports that need to be open, you will still need to authenticate to the remote machine with a user-name and password (unless you have the share wide open which I would not advise). The...