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- Oct 18, 2018
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When trying to load the license information, we get the following error message: "3CX failed to establish a TCP connection to activation.3cx.com."
I've seen several forum posts on this so I have already tried setting the primary DNS to 8.8.8.8 but this did not solve the issue. Below are the pertinent facts:
I've seen several forum posts on this so I have already tried setting the primary DNS to 8.8.8.8 but this did not solve the issue. Below are the pertinent facts:
- Server is running Windows Server 2012 R2 on a Hyper-V VM and was recently migrated to new hardware via a Hyper-V live migration.
- A new DC was recently added to the network. The DNS settings on the 3CX VM point to 8.8.8.8 for the primary and the IP of the new DC for the secondary. We've tried removing the IP of the DC completely as a test and it did not make a difference.
- The Windows firewall is disabled.
- The hardware firewall is a SonicWALL TZ400. The firewall rules all appear to be correct and the status indicator next to "Firewall" on the 3CX dashboard is green.
- Nothing is being blocked when trying to activate the license according to the SonicWALL logs.
- We have tried rebooting the Windows OS and the 3CX services. It has not made a difference.
- activation.3cx.com resolves to 151.80.125.88 when doing a tracert.