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98 Barracuda Spam Firewall Administrator’s Guide

Impact of Changing the IP Address of a Clustered System

If your Barracuda Spam Firewall is running firmware version 3.1.x or earlier and is part of a clustered

environment, then changing the IP address of the system removes it from the cluster. You will need

to add the system back into the cluster after you change the IP address.

If your Barracuda Spam Firewall is running firmware version 3.2.x or above, the system remains part

of its clustered environment after its IP address changes.

Clustered Systems

Cluster Field Enter the IP address or host name of one of the Barracuda Spam

Firewalls in the cluster to join, and click Join Cluster.

Once this system joins the cluster, the following happens:

• Configuration settings are pulled from the cluster and some of

these settings override the settings on this system.

• User lists on this system are synced with the cluster so no user

accounts are lost.

Cluster System List Cluster System lists the other systems in this cluster.

Mode specifies whether a system is Standby or Active. Designate

a server as Standby if you want a spare system to switch to in the

event another system goes down. Only Active servers filter

incoming messages.

You must manually switch a standby server to Active if you want

the standby server to begin filtering messages. The switchover

does not automatically occur when an active server fails.

Status displays whether each system is up and running (green

dot) or down (red dot).

Local Host Map

Host Name /

IP Address

Maps a local host name to an IP address for a system in the

cluster. This mapping results in a local override of DNS hostname-

to-IP address lookups. Click Add after specifying each new entry.

This mapping is not synchronized with other systems in the

cluster.

Use the local host map feature when:

• There are clustered Barracuda Spam Firewalls on different

private networks and systems on the same private network must

communicate using the private IP address of the other systems

while systems on different networks must communicate using

the public IP address of the other systems.

• Different clustered Barracuda Spam Firewalls need to forward to

different destination mail servers. In this case, the Destination

Server field on the Domain configuration page could be

"localmail" and each Barracuda Spam Firewall in the cluster

would have a different IP address assigned to "localmail" in the

Local Host Map field.

Table 7.13:

Field Description

1 2 ... 93 94 95 96 97 98 99 100 101 102 103 ... 141 142

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Barracuda Networks 4 Guía de instalación Pagina 98

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