Autodesk 15606-011408-9330 - MAPGUIDE R6.3 SITE LIC-UPG R6 User Manual page 73

When installed, the MapAgent reads the MapServer_IP value from the
registry and gets all the MapGuide Server IPs that can handle requests. The
ISAPI and NSAPI MapAgents keep track of the number of requests each
Autodesk MapGuide Server is currently handling. The CGI MapAgent cannot
keep track of the number of requests each Autodesk MapGuide Server is
handling. When a new request comes in, the ISAPI and NSAPI MapAgents
assigns the new request to the Autodesk MapGuide Server that is currently
handling the fewest requests.
If you are using the ISAPI or NSAPI version of the MapAgent, the requests are
distributed to the servers in a rotating manner. If you are using the CGI
version of the MapAgent, it has no persistent memory between requests, so
it distributes the requests randomly among the servers. For more informa-
tion, see "Understanding Multiple Simultaneous Server Requests" on
page 56.
You may also want to consider purchasing a third-party load-balancing
solution such as Microsoft Windows NT Load Balancing Service (WLBS), the
F5 Networks 3DNS Controller, or the RADWARE Web Server Director (WSD)
products.
Firewalls
When you use a remote MapAgent, you need to configure your firewall to
permit DCOM penetration from the outside to the inside. First, you must
limit the DCOM port range on the Autodesk MapGuide Server computer. By
default, a DCOM server uses port 135 for handshaking and uses any port in
the range of 1,024 through 65,535 to service the DCOM call. To limit the
range of DCOM, you must use REGEDT32.EXE.
Add the following three values to the key HKEY_LOCAL_MACHINE\
SOFTWARE\Microsoft\Rpc\Internet (the Internet key does not exist by default,
so you might need to create it):
Autodesk MapGuide Server RPC Values
Value Name
PortsInternetAvailable
UseInternetPorts
Ports
Data Type Text
REG_SZ Y
REG_SZ Y
REG_MULTI 6600-6610
Setting Up Your Servers
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73