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protocols such as FTP, TFTP, H323 etc.   



 

FTP ALG - To allow FTP clients and servers to transfer data across NAT, keep the 
default Enable.   



 

TFTP ALG - To allow TFTP clients and servers to transfer data across NAT, keep the 
default Enable. 



 

H323 ALG - To allow Microsoft NetMeeting clients to communicate across NAT, keep 
the default Enable. 



 

RTSP ALG - To allow some media player clients to communicate with some streaming 
media servers across NAT, click Enable.   

Click the Save button to save your settings. 

Choose menu “Security  → Advanced Security”, you can protect the Router from being 

attacked by TCP-SYN Flood, UDP Flood and ICMP-Flood in the screen as shown in Figure 4-43.  

 

Figure 4-43  Advanced Security 



  Packets Statistics Interval (5~60) - The default value is 10. Select a value between 5 and 

60 seconds from the drop-down list. The Packets Statistics Interval value indicates the time 

section of the packets statistics. The result of the statistics is used for analysis by SYN Flood, 

UDP Flood and ICMP-Flood. 



  DoS Protection - Denial of Service protection. Check the Enable or Disable button to 

enable or disable the DoS protection function. Only when it is enabled, will the flood filters be 

enabled.