All Barracuda Link Balancer models, firmware version 1.2 and above
The Link configuration page found on Basic > Links is used to configure each of the WAN interfaces and links to the Internet.
The network port images provide a graphical representation of the current state of the WAN links connected to the Barracuda Link Balancer.
- Yellow Light ? This indicates the link state of the WAN port. If the light is on, then a cable is connected. If the light is off, it indicates a problem with the cable.
- Green light ? This indicates the state of the actual Internet connection. If this light is on, then the pathway to the Internet for that WAN adapter is open. If this light is off, then there is some problem with the Internet connection on this link.
- Mouse Over ? Mousing over the link images will show details about the connection such as current IP address, state, and utilization.
To edit settings for each WAN link:
Click the arrow graphic under the Configure column to edit the WAN link and update the following fields:
- Name ? The name used on the Barracuda Link Balancer to identify the connection.
- Type ? How the interface obtains IP addresses. DHCP, static and PPPoE are supported. For each method, different parameters appear:
- DHCP ? The Lease Time value will appear if it is available. You will also be able to renew the lease.
- Static ?
- Enter the WAN IP address, subnet mask and gateway. The WAN IP address is the IP address used for general purpose NAT.
- You may need to add Additional IP Addresses:
- If the built-in firewall of the Barracuda Link Balancer is disabled, only the traffic destined for the Additional IP Addresses is passed to your firewall.
- If the built-in firewall of the Barracuda Link Balancer is enabled, the Additional IP Addresses are the external IP addresses that are eligible to be used for 1:1 NAT or port forwarding rules to direct traffic to systems on the local network.
- Click Discover to populate a list of IP addresses of live systems that are on the same Class C network as this WAN interface. The Discover button is only visible if there are no entries in the Additional IP Addresses list and if the built-in firewall is disabled.
- Click '+' to add IP addresses manually.
- PPPoE ? Enter the User Name and Password.
- Upstream / Downstream Speeds ? Enter the throughput speeds specified by your ISP, in kilobits per second. These values are used to determine how to best balance traffic across the links. If they are entered incorrectly, no traffic will be sent.
- Health Check ? Multiple testing methods are supported. Unless you choose "Always Pass", you can enter multiple test targets for each test. If the test fails on all of the targets then the link will not be used. Link failure is shown on this page and on the Basic > Status page.
- Ping - Enter an IP address or a host name (e.g. www.barracuda.com) in the Test field. If all of the test sites are unreachable the test will fail.
- HTTP Test - Enter the complete URL (starting with "http") in the Test field, and a pattern expected in the resulting HTML.
- DNS Test - Enter a fully qualified host name in the Test field. If none of the host names can be reached the test will fail.
- TCP Port Check - Test should be in IP:Port format.
- Always pass - This test will always pass regardless of the status of the link.
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