| | Error: "A protection device or license is required" (LM) (A firewall is blocking the connection) (Pervasive) |
| Cause | A firewall is blocking Sentinel RMS License Manager, or UDP port 5093. |
| Resolution | - Disable any firewall you have and confirm if the issue is resolved. It is possible you have multiple firewalls such as the Windows firewall, a second 3rd party software firewall and even a hardware firewall. All firewalls must be disabled to properly test this.
- If you're confirmed a firewall is blocking the connection, add UDP port 5093 to the firewall exceptions list.
Note: For Windows firewall, click on Advanced settings and add a Inbound and Outbound rule to allow UDP port 5093. Other 3rd party firewalls will have a different workflow to set an exclusion. Consultant with your IT professional if you are unsure. |
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