IP Relay HWg-ER02b - Manual
HW group
www.HW-group.com
20/ 42
(
IP attempting to access
AND
N
) =
W
Access is granted if the above condition is
true. AND represents bitwise multiplication.
MAC Address
00:0A:59:00:95:6C
MAC address is a unique device address in the Ethernet network and it is always factory-preset. You
can find it on the label inside the device. Using this address, individual devices can be distinguished
for example in the UDP section of the setup program.
The address respects restoring of the default configuration with the “
D0
” command.
I: Address
192.168.6.15
Configures the IP address of the converter.
J: Port
23
Configures the converter's communication port
–
from 1 to 65535.
Port 99 is reserved for TCP Setup, if supported
by the particular model and enabled in the setup.
M: Mask
255.255.255.0
IP network mask applicable in the local network.
Communication with all devices outside of the local
network (as determined by the IP address and
network mask) is directed through the gateway.
G: Gateway
192.168.6.254
Address of the Gateway that enables access to
external networks (outside of the IP range defined
by the converter's IP address and the mask).
====== In IP Setup ======
W: Address
0.0.0.0
IP address of a network or a computer that is allowed to communicate with the device. This value must be
the result of a bitwise AND of the remote IP address and the restriction mask (option N), otherwise the
device does not react.
N: Mask
0.0.0.0
This mask restricts addresses that are allowed to communicate with the device. Security can be
enhanced by setting a fixed address or a suitable restrictive mask that disallows communication with
unauthorized parties.
X: Port
0.0
Y: Port Mask 0.0
Restricts the range of TCP ports that can
communicate with the device.
MASK, IP address and Gateway functions:
An Ethernet device communicates:
Within a local Ethernet network
: No
Gateway is used or needed. However, IP
addresses of both sides must be within the
configured mask. For example, a mask of
255.255.255.0 means that the IP addresses
can only differ in the last byte.
Outside of the local network
– through the
Gateway
, which itself must have an IP
address within the range delimited by the
mask.
In addition to this basic configuration, it is
possible to restrict the range of IP addresses
allowed to communicate with the converter in
“
In IP Setup
”. For debugging, we therefore
recommend to keep this parameter set to
0.0.0.0.
