In Centos 7, after using Teamviewer 15.8.3 for a time, there is an error says a connection failure: the connection was blocked after timeout. Your license limits the maximum chat time between you and your partner, and it will be blocked when you reconnect immediately. Please try again later or upgrade your license.

We can try to change the ID of Teamviewer by modifying the MAC address.

1. Remove Teamviewer

Query the rpm package and uninstall teamviewer.

$ rpm -q teamviewer
teamviewer-15.8.3-0.x86_64
$ sudo yum remove teamviewer-15.8.3-0.x86_64

2. Change Mac address

Run ifconfig to list the local network, the results are as follows:

$ ifconfig
enp12s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether b8:88:e3:3c:17:03  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
...

enp12s0 is the network interface to be changed. The Mac address is b8:88:e3:3c:17:03. Change it by typing:

sudo ifconfig enp12s0 hw ether b8:88:e3:3c:97:01

3. Install Teamviewer

sudo yum install ./teamviewer_15.8.3.x86_64.rpm

After all, open teamviewer, or run sudo teamviewer info in the terminal.

$ sudo teamviewer info
 TeamViewer                           15.8.3  (RPM) 
 TeamViewer ID:                        271239144 
...

4. Change Mac address permanently

Through the above steps, we can change the Mac address, but it is temporary. If we restart the computer, the Mac address will return to the original address. We can add a command in the file of /etc/rc.local, such as:

#!/bin/bash
# THIS FILE IS ADDED FOR COMPATIBILITY PURPOSES
... 

# Add this line
ifconfig enp12s0 hw ether b8:88:e3:3c:97:01

Please note that we must run chmod +x /etc/rc.d/rc.local to ensure that this script will be executed during boot.

chmod +x /etc/rc.d/rc.local