Chapter 38 IDP
ZyWALL USG Series User’s Guide
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signature or click the Edit icon to edit an existing signature. You can also delete custom signatures here
or save them to your computer.
Note: The Zyxel Device checks all signatures and continues searching even after a match is
found. If two or more rules have conflicting actions for the same packet, then the Zyxel
Device applies the more restrictive action (reject-both, reject-receiver or reject-sender,
drop, none in this order). If a packet matches a rule for reject-receiver and it also
matches a rule for reject-sender, then the Zyxel Device will reject-both.
Figure 507 Configuration > UTM Profile > IDP > Custom Signatures
The following table describes the fields in this screen.
Table 265 Configuration > UTM Profile> IDP > Custom Signatures
LABEL DESCRIPTION
Custom Signature
Rules
Use this part of the screen to create, edit, delete or export (save to your computer) custom
signatures.
Add Click this to create a new entry.
Edit Select an entry and click this to be able to modify it.
Remove Select an entry and click this to delete it.
Export To save an entry or entries as a file on your computer, select them and click Export. Click Save
in the file download dialog box and then select a location and name for the file.
Custom signatures must end with the ‘rules’ file name extension, for example, MySig.rules.
# This is the entry’s index number in the list.
SID SID is the signature ID that uniquely identifies a signature. Click the SID header to sort
signatures in ascending or descending order. It is automatically created when you click the
Add icon to create a new signature. You can edit the ID, but it cannot already exist and it
must be in the 9000000 to 9999999 range.
Name This is the name of your custom signature. Duplicate names can exist, but it is advisable to use
unique signature names that give some hint as to intent of the signature and the type of
attack it is supposed to prevent.
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