Network communications parameters
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This option is provided for connections across firewalls, as firewall software
filters according to TCP/UDP port. It is recommended that you do not use
this parameter unless you need to for firewall reasons.
The ClientPort option designates the port number on which the client
application communicates using TCP/IP. You may specify a single port
number, or a combination of individual port numbers and ranges of port
numbers.
It is best to specify a list or a range of port numbers if you wish to make
multiple connections using a given Data Source or given connect string. If
you specify a single port number, then your application will be able to
maintain only one connection at a time. In fact, even after closing the one
connection, there is a short timeout period during which no new connection
can be made using the specified port. When you specify a list and/or range of
port numbers, the application keeps trying port numbers until it finds one to
which it can successfully bind.
Examples
♦ The following string makes a connection from an application using port
6000 to a server named my_server using port 5000:
CommLinks=tcpip{ClientPort=6000;ServerPort=5000};
ServerName=my_server
♦ The following string makes a connection from an application that can
use ports 5050 through 5060, as well as ports 5040 and 5070 for
communicating with a server named my_server using the default server
port:
CommLinks=tcpip{ClientPort=5040,5050-
5060,5070};ServerName=my_server
DoBroadcast parameter
TCP/IP (all platforms)
IPX, SPX (all platforms except UNIX and CE)
DOBROADCAST=ALL (formerly DOBROADCAST=YES) a broadcast is
performed to search for a server. For IPX and SPX, the broadcast is only
performed if the server is not found in the bindery.
With DOBROADCAST=DIRECT (formerly DOBROADCAST=NO), no
broadcast is performed to search for a database server. In this case, you must
specify the server host with the HOST option.
Description
Usage
Description
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