How to perform a connectivity check if a machine is shown offline in ACP
Challenge
A source machine has a replication agent installed but it is shown in an offline state in ACP, although the machine has been properly discovered before.
Solution
One of the possible ways to check the connection to Acura is to use the telnet command on the source machine.
Execute telnet <Acura's_IP> 443 from the command line to create a remote connection with the target system over a TCP/IP network.
If such a connection can not be established, the following message will be shown:
- Connecting To <Acura's_IP>...Could not open connection to the host, on port 443: Connect failed
This is a sign that the replication agent will not be able to connect to Acura's instance unless current network settings are adjusted. Please check that the required ports are open and your Security groups allow the corresponding traffic.
By default, the telnet client in Microsoft’s Windows operating systems is disabled. Run the following command in the command prompt with administrator permissions to enable it:
dism /online /Enable-Feature /FeatureName:TelnetClient
Related Articles
How to replace Windows replication agent's config file in case a machine is shown offline in ACP
Challenge A machine is shown offline in ACP, although the source instance is running and has been replicated successfully before. Cause The replication agent's config file might have become corrupted during an unexpected termination of the repman ...Machine has "Blocked" state in the control panel
Challenge A machine has "Blocked" status in the Machines Groups section of the ACP. Cause A machine becomes "Blocked", if it's used to start a CloudSite. This is primarily true for VMware target clouds. The "Blocked" state will remain as long as the ...Replication agent is installed, but the machine doesn't appear in ACP
Challenge After a new installation of the replication agent, the machine cannot be protected, however, it was protected in another cloud before that. Cause If a new agent is installed on the machine that has been protected before, configuration files ...Linux machine can't mount a disk and boot.
Challenge A Linux machine can't mount a disk and boot. Cause A wrong disk label is written in fstab, so the machine can't mount the disk and boot. Solution 1. Type in your root password and press "Enter" to log in to a maintenance session. 2. Run ...How to check and restore ETCD after a full shutdown of HA Acura deployment (error 503)
Challenge High Availability (HA) Acura deployment has been unexpectedly rebooted due to power outage or accident, and the UI is no longer accessible - error 503. All nodes have been shut down simultaneously. If there has been only one affected node, ...