There are 3 methods to check system log of router. Select Management -> System Log, and follow the methods as below:

 
Method 1: Log Settings
Step 1: Click Check System Log button, and download the file “messages” to your folder.


Step 2: Open the messages via WordPad/NotePad, then you can check system log.

 
Method 2: Syslog Settings
Step 1: Download system log server application, ex: Kiwi Syslog Server:
http://www.kiwisyslog.com/free-tools/kiwi-free-syslog-server
Step 2: Click File -> Setup, and fill in the IP address of your network device, then click Add:


Step 3: Enable “Enable Logging to Syslog Server”, and fill in the IP address of the PC installing 
Kiwi Syslog Server:


Step 4: You’ll be able to check the log in Kiwi Syslog Service Manager as below:

 
Method 3: E-mail Settings 
Step 1: Setup the e-mail information as below:


Step 2: You will receive the log email: