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TL-WR841N/TL-WR841ND/TL-WR847N
300Mbps Wireless N Router User Guide
 
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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. 
4.9.2 
Advanced Security 
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 4-40.  
 
RTSP ALG - To allow some media player clients to communicate with some streaming media servers 
across NAT, click Enable.   
 
Figure 4-40  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. 
 
Note: 
Dos Protection will take effect only when the Traffic Statistics in “System Tool   Traffic 
Statistics
” is enabled. 
  Enable ICMP-FLOOD Attack Filtering  - Enable or Disable the ICMP-FLOOD Attack 
Filtering.