MACROMEDIA COLDFUSION 4.5-ADMINISTRING COLDFUSION..., Manual

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184 Administering ColdFusion Server
4. Verify that the name that appears in the Host Name field is the name assigned to
the server (www1) and not the name of your Web site (most likely, www.). If the
names are the same (www.), change one.
Typically, it’s easier to change the server’s host name so that you don’t cause DNS
mapping resolution problems for your customers when they type in your site’s
URL. However, weigh this against how often the server’s physical location might
change. If you relocate the server at some point from its current location and plug
it back into the network, it’s possible your configuration may no longer work.
Configure ClusterCATS for use across firewalls
Many corporate environments today rely on firewalls to securely control access to
proprietary knowledge that resides on public Internet sites, internal intranet sites, or
private extranet sites. You can configure ClusterCATS to work seamlessly across one or
more firewalls.
If you have multiple, distributed server clusters supporting the same domain, you’ll
need to open appropriate ports on each firewall to ensure that the server clusters’ load
balancing and failover features work. For example, if you cluster multiple, distributed
Web servers that have a firewall between them, you must open ports 9123 and 9129 on
the firewall that separates them to enable server to server communications.
Additionally, if you will be managing your cluster from behind another firewall, you
must open both ports so that the ClusterCATS Explorer can communicate with the
cluster.
The following diagram illustrates this scenario.