GÜDE Expert Power Control 8041 Series, Manual, Page: 58 / 118

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Expert Power Control 8041/8045 © 2022 GUDE Systems GmbH
Specifications
4.3 IP ACL
IP Access Control List
The IP Access Control List (ACL IP) is a filter for incoming IP packets. If the filter is act-
ive, only the hosts and subnets whose IP addresses are registered in the list, can con-
tact via HTTP or SNMP, and make changes. For incoming connections from unauthor-
ized PCs, the device is not completely transparent. Due to technical restraints, a TCP/IP
connection will be accepted at first, but then rejected directly.
Examples:
Entry in the IP ACL Meaning
192.168.0.123 the PC with IP Address "192.168.0.123" can access the device
192.168.0.1/24 all devices of subnet "192.168.0.1/24" can access the device
1234:4ef0:eec1:0::/64
all devices of subnet "1234:4ef0:eec1:0::/64" can access the
device
If you choose a wrong IP ACL setting and locked yourself out, please activate the
Bootloader Mode and use GBL_Conf.exe to deactivate the IP ACL. Alternatively, you
can reset the device to factory default.
4.4 IPv6
IPv6 Addresses
IPv6 addresses are 128 bit long and thus four times as long as IPv4 addresses. The first
64 bit form a so-called prefix, the last 64 bit designate a unique interface identifier. The
prefix is composed of a routing prefix and a subnet ID. An IPv6 network interface can be
reached under several IP addresses. Usually this is the case under a global address and
the link local address.
Address Notation
IPv6 addresses are noted in 8 hexadecimal blocks at 16 bit, while IPv4 normally is noted
in decimal. The seperator is a colon, not a period.
E.g.: 1234:4ef0:0:0:0019:32ff:fe00:0124
Leading zeros may be omitted within a block. The previous example can be rewritten as:
1234:4ef0:0:0:19:32ff:fe00:124
One may omit one or more successive blocks, if they consist of zeros. This may be
done only once within an IPv6 address!