Chapter 43 Troubleshooting
ZyWALL ATP Series User’s Guide
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matches a rule for
reject-receiver
and it also matches a rule for
reject-sender
, then the Zyxel Device will
reject-both.
I uploaded a custom signature file and now all of my earlier custom signatures are gone.
The name of the complete custom signature file on the Zyxel Device is ‘custom.rules’. If you import a file
named ‘custom.rules’, then all custom signatures on the Zyxel Device are overwritten with the new file. If
this is not your intention, make sure that the files you import are not named ‘custom.rules’.
I cannot configure some items in IDP that I can configure in Snort.
Not all Snort functionality is supported in the Zyxel Device.
The Zyxel Device’s performance seems slower after configuring ADP.
Depending on your network topology and traffic load, applying an anomaly profile to each and every
packet direction may affect the Zyxel Device’s performance.
The Zyxel Device routes and applies SNAT for traffic from some interfaces but not from others.
The Zyxel Device automatically uses SNAT for traffic it routes from internal interfaces to external
interfaces. For example LAN to WAN traffic. You must manually configure a policy route to add routing
and SNAT settings for an interface with the
Interface Type
set to
General
. You can also configure a
policy route to override the default routing and SNAT behavior for an interface with the
Interface Type
set to
Internal
or
External
.
I cannot get Dynamic DNS to work.
• You must have a public WAN IP address to use Dynamic DNS.
• Make sure you recorded your DDNS account’s user name, password, and domain name and have
entered them properly in the Zyxel Device.
• You may need to configure the DDNS entry’s IP Address setting to
Auto
if the interface has a dynamic
IP address or there are one or more NAT routers between the Zyxel Device and the DDNS server.
• The Zyxel Device may not determine the proper IP address if there is an HTTP proxy server between the
Zyxel Device and the DDNS server.
