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D-Link DSL-X1852E User Manual
Section 4 - Configuration
IPv4/IPv6 Filter
The Firewall contains filtering functions to filter traffic based on the network protocols and
source and destination IP addresses.
Go to
Features
>
Firewall
, then click the
IPv4 Filter
tab or the
IPv6 Filter
tab to configure
rules for traffic filtering. To configure a rule to filter unwanted traffic, first enable this feature
by clicking
Enable
for either
Upstream Port Filtering Rules
for traffic that is sent out of the
router (LAN to WAN) or
Downstream Port Filtering Rules
for traffic that is received by the
router from an external network (WAN to LAN).
Configure the following settings
:
Filtering Mode:
Select either
Blacklist
or
Whitelist
to deny or permit the following
filtering list.
Filter Name:
Enter a name for the filtering rule.
Protocol:
Select the network protocol for the traffic:
TCP/UDP, TCP, UDP,
or
ICMP
(or
ICMPv6
for IPv6).
Source IP
Address/Port:
Enter the starting source IP address (e.g. 1.1.1.1 for IPv4 or 2001::1
for IPv6) and starting port that the rule will apply to. Depending on
whether it is a upstream or downstream traffic, this can be either a
WAN or LAN IP address. Both a single IP address and a range of IP
addresses can be used.
End Source IP
Address/Port:
Enter the ending source IP address (e.g. 1.1.1.5 for IPv4 or 2001::5
for IPv6) and ending port that the rule will apply to. For a single
IP address assignment, enter the same address as the starting IP
address. Depending on whether it is a upstream or downstream
traffic, this can be either a WAN or LAN IP address.
Source Subnet
Mask/Prefix
Length:
Enter the subnet mask of the source IP address for IPv4 addressing
scheme (four 8-bit octets). Or enter the prefix length for IPv6
addressing scheme (1-128).
