Remote desktop failure caused by dongle usage on VM instances

Error Report

No problem will be found when the dongle is not installed, but remote desktop cannot be found after installation. Then, a ticket is submitted to the data center for a solution.

Cause analysis

After logging on to your server, check that your server has installed a server dongle. According to our analysis, the software has enabled arp protection and blocked the Gateway's MAC address. The arp protection function has been disabled, remote recovery of test server

Solution

Some firewall configurations have been made, so we can solve the problem. At present, we have disabled the dongle software for testing. Of course, you can install other security software, for example, selling coffee is very good.