Hi all,

Could someone kindly explain the following:

One-to-one : is the first "One(LAN)-to-One(WAN)" or is it "One(WAN)-to-One(LAN)" ?

Range-to-one : is the first "Range(LAN)-to-One(WAN)" or is it "Range(WAN)-to-One(LAN)" ?

Range-to-Range : is the first "Range(LAN)-to-Range(WAN)" or is it "Range(WAN)-to-Range(LAN)" ?


Basically is the left side WAN and the right side LAN or vice versa?

Many thanks,

Sean

My understanding is that:
One to One is a single external port to a single internal port, which also allows for having a different external port from the internet port i.e. HTTPS TCP 8443 could map to 443
Range to One opens multiple external ports in a range to a single internal port i.e. SIP UDP 5050 > 5070 maps to UDP 5060
Range to Range has two options:
Range to Range - Port: This maps a range of open ports externally to the same range for one IP internally, i.e. UDP 10000 to 20000 is forwarded to an internal PBX system
Range to Range - IP: This maps a sequential range of ports to the same number of IP addresses, i.e. TCP 100 to 110 could map TCP port 80 to all IPs in the range of 192.168.1.100 to 192.168.1.110, useful for a range of IPs with web interfaces

Thanks for the response. I think I get it now.