ELSA LANCOM Business LC-4X00, Manual

Page: 234 / 276

Description of the menu options
ELSA LANCOM Business
R64
쮿
D-st., D-end
Destination port range that is to be filtered. A range of 0 to 0 means that no
destination port is affected by this filter.
쮿
S-st., S-end
Source port range that is to be filtered. A range of 0 to 0 means that no source port
is affected by this filter.
쮿
Src-address, Src-netmask
A subnetwork of the local network for which the filter is valid can be entered here.
A source address of 0.0.0.0 means that the filter is applied to all computers. A
network mask of 0.0.0.0 means that the filter is applied to all networks (which also
means all computers).
쮿
Prot
Protocol that is to be filtered. Possible entries are TCP , UDP , ICMP and all .
The setting all filters out every packet from the specified source network or to the
destination network.
쮿
Type
Filter type. The possible values are Always-filt., Connect-filt. and Internet-filt.
– Always filter: The packet is discarded.
– Connect filter: The packet is discarded if there is no connection to the remote
station.
– Internet filter: The packet is discarded if its destination can be accessed only via
the default route.
The default filter is entered in the above table. It suppresses the unwanted and cost-
intensive connections in Windows networks on IP. These networks regularly send items
such as DNS queries to the local network, which are routed to the Internet without this
filter.
WAN-filter-
table This table allows you to enter specific ranges of destination ports. If packets with the
entered ports are received from the WAN side, they will not be forwarded (firewall
function).
The WAN port filters are defined in a table similar to the LAN filter table:
The fields in the table have the same meaning as in the LAN filter table, with the
following exception:
쮿
Dst-address, Dst-netmask
Idx. D-st. D-end S-st. S-end Dst.-address Dst-netmask Prot
WIN 53 53 137 139 0.0.0.0 0.0.0.0 TCP
and
UDP