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© Virtual Access 2017
GW7304 Series User Manual
Issue: 1.9
Page 245 of 336
services; for example, NTP to the Internet. While DNAT hides the local network from the
Internet, SNAT hides the Internet from the local network.
Source NAT and destination NAT are combined and used dynamically in IP masquerading
to make computers with private (192.168.x.x, etc.) IP addresses appear on the internet
with the system's public WAN IP address.
25.7.4
True destination port forwarding
This usage is similar to SNAT, but as the destination IP address is not changed,
machines on the destination network need to be aware that they'll receive and answer
requests from a public IP address that is not necessarily theirs. Port forwarding in this
fashion is typically used for load balancing.
config redirect
option src wan
option src_dport 80
option dest lan
option dest_port 80
option proto tcp
25.7.5
Block access to a specific host
The following rule blocks all connection attempts to the specified host address.
config rule
option src lan
option dest wan
option dest_ip 123.45.67.89
option target REJECT
25.7.6
Block access to the internet using MAC
The following rule blocks all connection attempts from the client to the internet.
config rule
option src lan
option dest wan
option src_mac 00:00:00:00:00:00
option target REJECT