
                                         P-661H-D Series Support Notes 
4. SUA Notes 
Tested SUA/NAT Applications (e.g., Cu-SeeMe, ICQ, NetMeeting)   
Introduction  
Generally, SUA makes your LAN appear as a single machine to the outside 
world. LAN users are invisible to outside users. However, some applications 
such as Cu-SeeMe, and ICQ will need to connect to the local user behind the 
P-661H-D. In such case, a SUA server must be configured to forward the 
incoming packets to the true destination behind SUA. After the required server 
are configured in Web Configurator, Advanced Setup, Network -> NAT -> 
Port Forwarding, the internal server or client applications can be accessed by 
using the P-661H-D's WAN IP Address. 
SUA Supporting Table   
The following are the required Web Configurator, Advanced Setup, Network 
-> NAT -> Port Forwarding for the various applications running SUA mode.  
ZyXEL SUA Supporting Table1
Required Settings in Port Forwarding   
Port/IP  
Application    
Outgoing Connection    Incoming 
Connection  
HTTP None 80/client IP 
FTP None 21/client IP 
TELNET None 23/client IP  
(and active Telnet 
service from WAN) 
POP3 None 110/client IP 
SMTP None 25/client IP 
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