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unable to open tunnel port

  • December 9, 2024
  • 2 replies
  • 175 views
C
Bit
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Hi Commvaulters,

I’m having an issue where I keep getting to following entries in the cvfwd logs

848 1b54 12/09 17:43:36 ######## CN:00024 [local->Commvault:cvd] ERROR: Client connection to Commvault failed on : Couldn't complete tunnel connection to on 192.168.252.245:8403: The semaphore timeout period has expired.

5848 1b54 12/09 17:43:36 ######## CN:00023 [local->Commvault:cvd] ERROR: Client connection to Commvault failed on  Couldn't complete tunnel connection to  on 192.168.252.245:8403: The semaphore timeout period has expired.

It has worked, but recently added some Sql agents, and then the tunnel dropped shortly afterwards. I have attempted to recreate all the network rules again, but still receive this message on the client, and check readiness fail.

Flow of traffic is Commserve > core proxies > media  agent > customer proxy > Customer client server with file/SQL agents installed.

Any ideas anyone?  Thanks
 

Best answer by Wasim

Hi ​@crmljc,

1. Check Network Connectivity:
- Ensure that there is network connectivity between the client and the remote machine. Use tools like Telnet or CVping to verify that ports 8400 and 8403 are open bidirectionally.
2. Verify Services:
- Make sure that Commvault services are running on the remote machine.
3. Firewall Configuration:
- Check if the firewall is properly set up between the client and the remote machine. Ensure that the necessary ports are not blocked.
4. Retry the Connection:
- After confirming the above settings, try to establish the connection again.

If the issue persists, consider working with your network team to further diagnose and resolve the network issues.

 

Regards,

Wasim

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Vaulter
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  • WasimVaulter
  • Vaulter
  • 90 replies
  • Answer
  • December 10, 2024

Hi ​@crmljc,

1. Check Network Connectivity:
- Ensure that there is network connectivity between the client and the remote machine. Use tools like Telnet or CVping to verify that ports 8400 and 8403 are open bidirectionally.
2. Verify Services:
- Make sure that Commvault services are running on the remote machine.
3. Firewall Configuration:
- Check if the firewall is properly set up between the client and the remote machine. Ensure that the necessary ports are not blocked.
4. Retry the Connection:
- After confirming the above settings, try to establish the connection again.

If the issue persists, consider working with your network team to further diagnose and resolve the network issues.

 

Regards,

Wasim

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1 person likes this
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    crmljc
C
Bit
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  • crmljc
  • Author
  • Bit
  • 3 replies
  • December 12, 2024

I have tried all this, the pings dont respond due to clients being separated by physical firewalls, icmp blocked, however re-installing the CV software brought the tunnels back up, so I believe it was corrupted fwconfig on the client.  Thanks.

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