ZyXEL Communications 2 Plus User Manual

 Chapter 25 Logs Screens

ZyWALL 2 Plus User’s Guide

myZyXEL.com and the update server use certificates signed by VeriSign to identify 
themselves. If the ZyWALL does not have a CA certificate signed by VeriSign as a trusted CA, 
the ZyWALL will not trust the certificate from myZyXEL.com and the update server. The 
ZyWALL will generate a log like "Due to error code(11), cert not trusted: SSL/TLS peer 
certif..." for every time it attempt to establish a (HTTPS) connection with myZyXEL.com and 
the update server. The V4.00 default configuration file includes a trusted CA certificate signed 
by VeriSign. If you upgraded to ZyNOS V4.00 firmware without uploading the V4.00 default 
configuration file, you can download a CA certificate signed by VeriSign from 
myZyXEL.com and import it into the ZyWALL as a trusted CA. This will stop the ZyWALL 
from generating this log every time it attempts to connect with myzyxel.com and the update 
server.
Follow the steps below to download the certificate from myZyXEL.com.

1 Go to http://www.myZyXEL.com and log in with your account.
2 Click Download Center and then Certificate Download.

Figure 272   myZyXEL.com: Download Center

3 Click the link in the Certificate Download screen.

notes

The ZyWALL blocked the packet.

message

The ZyWALL blocked the packet in accordance with the firewall’s default policy of 

blocking sessions that are initiated from the WAN. “UDP” means that this was a User 

Datagram Protocol packet. “W to W/ZW” indicates that the packet was traveling from the 

WAN to the WAN or the ZyWALL. 

Table 133   Log Description Example