Zhone 1813 Guia Do Utilizador

unregistered_only 

If yes, only the outbound packets with unregistered source IP addresses are translated. All the 
outbound packets with the registered source IP addresses are forwarded on the WAN interface 
without translation. This is useful if you have one more subnet having a registered IP address 
that shares the common WAN link with the subnet having an unregistered IP address. 

Registered addresses are addresses reachable and advertised in the Internet whereas unregistered 
addresses are private addresses which are not reachable through the Internet. Currently there is 
no command to display registered addresses. 

EXAMPLE 

Tells the NAT module to translate only those outgoing packets that bears a unregistered IP 
address in the source address field of the packet header. 

 

same_ports 

This command tries to keep original port numbers for connections. If yes, nat will try to retain 
the source port without modification for outgoing packets. This can only be done if the port is 
not already in use by another connection. The default is yes. 

 

EXAMPLE 

This command tells the NAT module to retain the same source port while translating outbound 
packets. However, if this causes conflicts with existing entries in the NAT table then the source 
port will be modified.  

 

alias_address x.x.x.x 

This command sets up the address to use for aliasing. The source address field of the outbound 
packets from the WAN interface will be overwritten with the specified ip_address.  

 

EXAMPLE 

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