Firewall
BAT54-Rail/F..
Release
7.54
06/08
8.3
The BAT Firewall
301
U Port block list
Address, protocol and port of a destination station are filed in the port block
list, if blocking of the destination port on the destination station was selected
as a filter’s packet action. This table is likewise a sorted semi-dynamic table.
Sorting is done according to address, protocol and port. The table contains
the following elements:
U Host block list
The address of a station is filed in the host block list, if blocking of the sender
was selected in a filter’s packet action. This table is a sender address sorted
semi-dynamic table and contains the following elements:
8.3.10 Firewall limitations
Apart from understanding the functioning of Firewalls, it is also very important
to discern their limitations and to extend them if necessary. The Firewall does
not protect against malicious contents coming through the permitted ways
into your local network. It is true that certain effects of some viruses and
worms are stopped, because communication is blocked via the required
ports, but no Firewall alone is a comprehensive protection against viruses.
00200000 source is on VPN route
00800000 no route for destination
01000000 contains global actions with condition
Element Element meaning
Address Address of the station, to which the blocking should apply.
Protocol Used protocol (TCP/UDP etc.) The protocol is decimally indicated.
Port Port to close at the station. If the respective protocol is not port related, then the entire protocol
for this station becomes closed.
Timeout Duration of the blocking in minutes.
Filter rule Name of the rule, which has produced the entry (determines also the actions to be executed),
when a suitable packet is received.
Element Element meaning
Address Address of the station, to which the blocking should apply.
Timeout Duration of the blocking in minutes.
Filter rule Name of the rule, which has generated the entry (determines also the actions to be executed),
when a suitable packet is received.
Flag Flag meaning
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