Connection failure with server

Cause

This error would occur if the Vembu Client for: File & Application Backup, VMware & Hyper-V Backup, Windows Image Backup are not able to establish connection with the Vembu BDR Backup Server. Because of this, the Vembu Client is unable to send backup details to the BDR Backup Server and eventually backups will fail.

This connectivity error can occur due to one of the following reasons:

• Vembu BDR service is not running in the BDR Backup Server machine.
• Backup Port (default 32004) in BDR Backup Server is not in LISTEN state.
• Vembu Client agent is not able to connect to the BDR Backup Server's Backup Port (default 32004)
• NAT/Firewall configuration in the BDR Backup Server or Vembu Client may block 32004 port.
• While the Vembu client agent is actively processing the backup data to the BDR backup Server, connection between the client and server gets closed prematurely by an external force.
• The IP address/DNS name of the Vembu BDR Backup Server might be modified.

Solution

This error can be resolved with the below steps:

1. First check if the Vembu BDR service is running on your BDR Backup Server machine.
• Go to 'Run' and type “Services.msc”
• In the list, check for the “VembuBDR” service and see the status. If not started, then right-click and start.
2. Check if the Backup Port is in LISTEN state. Execute the command in the Vembu BDR Backup Server machine. Open a command prompt with administrative privileges and run the below command
• netstat -an | find "32004" in Windows OS
• netstat -an | find "34005" in Linux OS
3. If the backup port is listening, then confirm whether the client is able to connect to the BDR Backup Server through the TCP Port (default 32004). Execute the command in the Client machine through the command prompt.
• telnet <server ip="" address="" dns="" name=""> 32004
4. If the backup port is not listening, then confirm that both the BDR Backup Server and the Vembu Client are configured with the same Backup Port (by default, the port should be 32004). Verify this by checking <backup port=""> value in
• “<vembu installation="" location="">/conf/SGConfiguration.conf file."
5. If the BDR Service is successfully running in the BDR Backup Server, Vembu Client machines and the telnet command fails, then check these machines network's NAT/Firewall settings and make sure the Backup Port (default 32004) is open for the incoming traffic on BDR Backup Server machine and the outgoing traffic on Vembu Client.
6. If none of the above fixes works, then there is a chance that the IP address/DNS name of BDR server is modified, so please contact Vembu support at vembu-support@vembu.com.