ZyXEL ZyWALL USG 2000 User Guide - Page 583

Chapter 34 IDP Note: The ZyWALL 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 ZyWALL applies the more restrictive action (reject-both, reject-receiver or reject-sender, drop, none in this order). If a packet matches a rule for rejectreceiver and it also matches a rule for reject-sender, then the ZyWALL will reject-both. Figure 412 Configuration > Anti-X > IDP > Custom Signatures The following table describes the fields in this screen. Table 158 Configuration > Anti-X > 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. Activate To turn on an entry, select it and click Activate. 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. # SID Name 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 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. 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. ZyWALL USG 2000 User's Guide 583