D-Link DGS-3000 Series Reference Manual page 193

Packet Content
Click the Select button to select an ACL type.
Click the Create button to create a profile.
Click the <<Back button to discard the changes made and return to the previous page.
After clicking the Show Details button, the following window will appear:
Click the Show All Profiles button to navigate back to the Access Profile List Page.
After clicking the Add/View Rules button, the following window will appear:
DGS-3000 Series Gigabit Ethernet Switch Web UI Reference Guide
Select IPv4 ACL to instruct the Switch to examine the IPv4 address in each frame's header.
Select IPv6 ACL to instruct the Switch to examine the IPv6 address in each frame's header.
Select Packet Content ACL to instruct the Switch to examine the packet content in each
frame's header.
Allows users to examine up to 4 specified offset_chunks within a packet at one time and
specifies the frame content offset and mask. There are 4 chunk offsets and masks that can
be configured. A chunk mask presents 4 bytes. 4 offset_chunks can be selected from a
possible 32 predefined offset_chunks as described below:
offset_chunk_1,
offset_chunk_2,
offset_chunk_3,
offset_chunk_4.
chunk0 chunk1 chunk2
B126, B2, B6,
B127,
B3, B7,
B0,
B4, B8,
B1
B5 B9
Example:
offset_chunk_1 0 0xffffffff will match packet byte offset 126,127,0,1
offset_chunk_1 0 0x0000ffff will match packet byte offset,0,1
NOTE: Only one packet_content_mask profile can be created.
Figure 7-19 Access Profile Detail Information (Packet Content ACL)
Figure 7-20 Access Rule List (Packet Content ACL)
...... chunk29 chunk30
...... B114, B118,
B115, B119,
B116, B120,
B117 B121
184
chunk31
B122,
B123,
B124,
B125