Editing Generic Filters - ZyXEL Communications P-660HW-Tx v3 User Manual

Chapter 11 Packet Filter
Table 56 Security > Packet Filter > Edit (Protocol Filter) > Edit Rule (continued)
LABEL
Back
Apply
Cancel
If you applied the protocol filter rule, it will be displayed on the Security >
Packet Filter > Edit screen. Click the Edit icon if you want to modify the rule.
After you have configured the packet filters for incoming and outgoing traffic, you
can apply them to the WAN Internet access in the Network > Internet (WAN)
> Internet Access Setup: Advanced Setup screen. See
92 for more information.

11.2.4 Editing Generic Filters

Use this screen to display a generic filter set on your ZyXEL Device. The purpose
of generic rules is to allow you to filter non-IP packets. For IP packets, it is
generally easier to use the IP rules directly.
For generic rules, the ZyXEL Device treats a packet as a byte stream as opposed
to an IP or IPX packet. You specify the portion of the packet to check with the
Offset (from 0) and the Length fields, both in bytes. The ZyXEL Device applies
the Mask (bit-wise ANDing) to the data portion before comparing the result
against the Value to determine a match. The Mask and Value are specified in
hexadecimal numbers. Note that it takes two hexadecimal digits to represent a
byte, so if the length is 4 bytes, the value in either field will take 8 digits, for
example, FFFFFFFF.
In the Packet Filter screen, select Generic Filter from the Filter Type field.
Then click the Edit button from the Modify field to display the following screen.
Figure 77 Security > Packet Filter > Filter Rules
216
DESCRIPTION
Click this to return to the previous screen without saving.
Click this to save your changes.
Click this to restore your previously saved settings.
Section 5.2.1 on page
P-660HW-Tx v3 User's Guide