Filter
Top Products
Page 60 - Firewall Configuration The Configuration Tree Functions
The Custom Firewall Tab
The Custom tab is used to include specific filters in a Firewall profile. Each filter
can allow new a session to be created for a specific address and protocol or it
can be used to drop specific packets from passing across the link. Note that the
first filter entry is displayed against the firewall name in the summary list.
To add a filter, right-click within the Firewall Entry List to obtain the configuration
form as shown below.
Notes: This allows you to enter a brief description of your filter specification. If
the field is left empty the word “Entry” is inserted so that you are aware that a
filter has been applied.
Remote IP Address: This can be used to specify the IP address of the device at
the far end of the link or left blank to include packets destined for all IP
addresses.
Remote IP Mask: Packets can be checked against a destination’s IP Address
Mask. If the field is left blank then the default all-inclusive value 255.255.255.255
applies.
Local IP Address: This can be used to specify the IP address of a local device
or left blank to include packets originated by all local devices.
Local IP Mask: Packets can be checked against the local IP Address Mask. If
the field is left blank then the default all-inclusive value 255.255.255.255 applies.
IP Protocol: The IP port number to be matched. Port numbers define the IP
applications. e.g. 1 for ICMP, 6 for TCP, 17 for UDP or 47 for GRE.
Match Offset: The offset in bytes (0 is the first byte of an IP packet) where
checking for a specific port number, a range of port numbers, or data begins.
Match Length: The number of bytes to be checked, from the Match Offset point,
against the Match Data and Match Mask settings (see below).
Page 60 - The Configuration Tree Functions INDeX IPNC Cassette Administration Manual
Firewall Configuration 38DHB0002UKDD – Issue 7 (22/11/02)