Test The Result; What Can Go Wrong; How To Manage Voice Traffic - ZyXEL Communications ZyWALL 110 Handbook

Figure 673

7.4.2 Test the Result

Open the browser and query http://zyxel.for-our.info/.
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Create a Security Policy in order to view the testing result. Set Destination to be the Internal
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Server IP address (192.168.1.33 in this example) and set Log type to be the Log Alert.
Go to the ZyWALL/USG Monitor > Log, you will see [alert] log message such as below. The
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Source Interface is the WAN1 or WAN2 interface which is handling the least amount of outgoing
and incoming traffic.
Figure 674

7.4.3 What Can Go Wrong?

If you cannot access the Internal Server, please check that the NAT configuration matches the
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Internal Server IP address and Port number. If the NAT configuration is correct, please check the
system status of your Internal Server is up.

7.5 How to Manage Voice Traffic

This is an example of using Application Layer Gateway (ALG) to allow the SIP (Session Initiation
Protocol) voice traffic through the ZyWALL/USG. To achieve high-quality voice transmissions, use
ZyWALL/USG provides Bandwidth Management (BWM) function to effectively manage bandwidth
according to flexible criteria. You can limit bandwidth consuming services, such as Peer-to-Peer
(P2P) and FTP service while providing a higher priority and consistent bandwidth for voice traffic.
Chapter 7 Manage Your Network Traffic
ZyWALL/USG Series User's Guide
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