Operation
If the ACU is to communicate with any device that is not on the same subnet, the
gateway address parameter must be set to the IP address of a router.
Consider a setup where IP address=192.168.0.1 & Subnet mask=255.255.255.0
This means that the ACU is a member of the 192.168.0.0 network and that the
network infrastructure allows the ACU to communicate directly with any client that
has an IP address in the range 192.168.0.1 through 192.168.0.254.
Examples: Invalid settings:
255.255.255.0 255.255.255.255
255.0.0.0 0.0.0.0 (unless IP address is also 0.0.0.0)
5.8.6.11.4 Gateway Address
The Gateway address is the IP address of a router on the local IP network. It is
commonly presented as a string consisting of four period-separated numbers called
octets. The first octet may be an integer in the range 0 through 223 and the
remaining three octets may be set with values in the range 0 to 254.
SECURITY NOTE: Leave this parameter set to 0.0.0.0 unless the ACU needs to be
accessed by M&C clients that are not on the local network.
NOTE: Gateway address change will not take effect until the ACU is rebooted.
Consult the network administrator in order to obtain the router address. The
network port cannot be expected to interface with non-local network clients when
the Gateway address setting does not point to a valid router.
A Gateway address setting of 0.0.0.0 prevents the ACU from being accessed by
non-local network-attached devices. This is the recommended setting when the
network port will not be used, and when non-local access is to be prevented.
The Subnet mask determines which IP addresses are local or non-local. An IP
address is local if equivalent results are obtained when the mask is applied to the
IP address of the ACU and to the M&C client IP address. The IP address is non-
local if the results are not identical.
Example: With the IP address set to 192.168.0.1, and with the subnet mask set
to 255.255.255.0, all IP addresses in the range 192.168.0.1 through
192.168.0.254 are local. All others are non-local.
The Gateway address must conform to all rules that apply to IP addresses.
Examples: 192.168.0.254
10.0.0.1
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