ZyXEL 2WG Guida Utente

 Chapter 27 Logs Screens

ZyWALL 2WG User’s Guide

The following is an example of how a log displays in the command line interpreter and a 
description of the sample log. Refer to the 

 for more log message 

descriptions and the appendx for details on using the command line interpreter to display logs.

#  .time                 source                 destination            
notes
    message
  5|06/08/2004 05:58:20 |172.16.4.187:137      |172.16.255.255:137    
|ACCESS BLOCK
    Firewall default policy: UDP (W to W/ZW)

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.

Table 153   Log Description Example

#

This is log number five.

time

The log was generated on June 8, 2004 at 5:58 and 20 seconds AM. 

source

The log was generated due to a NetBIOS packet sent from IP address 172.16.4.187 port 

137. 

destination The NetBIOS packet was sent to the 172.16.255.255 subnet port 137. This was a 

NetBIOS UDP broadcast packet meant to discover devices on the network.

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.