Technical data

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Bridging Filtering Commands (FILTER BR)
Bridging filtering allows you to control the packets transferred across the router. This feature can be used to
enhance security or improve performance. Filtering occurs based on matched patterns within the packet at a
specified offset. Two filtering modes are available:
• Deny mode will discard any packet matched to the deny filter database and let all other packets pass.
• Allow mode will only pass the packets that match the allow filter database and discard all others.
Up to 40 deny and 40 allow filters can be activated from the filter database.
FILTER BR ?
Lists the supported keywords.
Response:
Bridge filter commands:
? add del
use list
FILTER BR ADD
Adds a bridging filter to the filtering database.
pos
Byte offset within a packet; number from 0-127
data
Hex number up to 6 bytes
Example:
filter br add 12 8035 deny
(
This filter prevents forwarding of RARP packets across the bridge)
FILTER BR DEL
Deletes a bridging filter from the filtering database.
pos
Byte offset within a packet; number from 0-127
data
Hex number up to 6 bytes
Example:
filter br del 12 8035 deny
filter br ?
filter br add
[
pos
] [
data
] allow | deny
filter br del
[
pos
] [
data
] allow | deny