Adding a host to the Redirector

To add a host to the Redirector:

1. Click Redirector Service in the Administration window.
2. Click Add.
3. Enter the target host's destination address. Make any necessary changes to the port numbers or security.
4. Click OK to save the connection and add it to the Redirector window.

Destination Address

Enter the host name or IP address of the target telnet server. If the IP address is likely to change, use the host name.

Destination Port

Enter the port number on the telnet server through which it will communicate with the Redirector. Many hosts use the default, which is 23, for Telnet connections.

Local Port

Enter the port number through which the Redirector will communicate with clients.

Use the standard default port numbers or devise a new numbering scheme. When devising a new numbering scheme, use port numbers that are not already defined for other TCP/IP applications. Because most well-known port numbers are less than 5000, pick a port number between 5000 and 65535 to avoid conflicts. You must configure the firewalls in your network to allow traffic on the port you choose.

Security

Select a security level. Security through the Transport Layer Security (TLS) or Secure Sockets Layer (SSL) protocol must be set for each host configuration. The choices are:

• Pass-through - no modification to the data stream between the client and host
• Client-side - provides encryption of data transmitted between the Redirector and the emulator
• Host-side - provides encryption of data transmitted between the Redirector and a secure server
• Both - provides encryption of data transmitted, through the Redirector, between the emulator and a secure server

If you are using the Express Logon Feature, this option must be set to Pass-through.

Client Authentication

This option is enabled only if the Redirector is configured to use Java Secure Socket Extension (JSSE). This will enable redirector to request Client certificate during handshake process for improved security. Refer to Adding a host to the Redirector for information on how to configure JSSE for Redirector on Windows.

Log Connections

Select Yes if you want to save Redirector connection information in a log file. For each connection from the client, there is a corresponding connection to the host. The log file contains the IP address, port, and the state of the connection. The following table defines the different connection states:

O	Open
C	Closed
N	Not attempted

If the state of the connection is not attemped, the connection failed to open or did not attempt to open because of another error, for example, the client connection failed to open and therefore the host connection was not attempted.

The default is No. You must stop and restart the Redirector to begin logging connections.

LogFile

If you select Yes for Log Connections, you can specify a directory and name for the log file. If you do not specify a directory, the log file is created in \HostOnDemand\lib. If you do not specify a file name, a window appears asking you to specify a file name.

Rollback Size

If you select Yes for Log Connections, you can specify a maximum size (bytes) for the log file. When the log file reaches the size you specify, any existing Redirector connection information is deleted and new Redirector connection information is logged at the beginning of the file. The default is 65536 bytes.

Keep-Alive

Select Yes if you want the Redirector connection to remain active during a period of inactivity. Keep-Alive requires Java 2 on all operating systems except AIX. You must stop and restart the Redirector for Keep-Alive to take effect.

Timeout (minutes)

Specify the number of minutes to wait before dropping an inactive Redirector connection. You must stop and restart the Redirector for the Timeout value to take effect.

IP Trace

Type one or more IP addresses of clients you want to trace, separated by commas, to trace the number of bytes sent from the client to the host and from the host to the client. The trace information is logged in NCoDServices.RAS.txt in the private directory (for example, C:\Program Files\IBM\HostOnDemand\private or /usr/local/hostondemand/private).

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