Nokia 9290 Setting up Dial-in Service - Page 7

Nokia Mobile Phones Nokia 9290 Communicator Setting Up Dial-In Service 7 (11) If the call back type is "Use number below", the user must define the number where server will call back. It is suggested that the server checks the authentication credentials before calling the number, in order to avoid misuse. Call back number is the number to which callback is requested when "Use number below" is selected as the call back type. "Note that the incoming callback data call (from the dial-up server to the Communicator) is established as normal analog data call (9600). The support for the incoming callback data call depends on the GSM network and the dial-up system." 2.3.6 Other settings The Other settings pages contains miscellaneous settings which may have to be defined to make successful Internet connections. Allow plain text login determines the PPP authentication method. If it is set to "Yes", the Password Authentication Protocol (PAP) is enabled. When PAP is used, the authentication password is passed to the remote server in cleartext. Setting this to "No" will activate Challenge Authentication Protocol (CHAP), which will use a challenge-response authentication protocol and the password itself will not be transferred over the PPP connection. It is advisable to configure the server to accept CHAP for increased security. Note that if CHAP is not supported on the server and the client is set to use it, the login will fail and the data call will be dropped as the communicator will not try to fall back to PAP for security reasons. On the other hand, if PAP was enabled, the server may opt to use CHAP instead. Use PPP compression switch is used to control the PPP level data compression. In most cases compression will be used, but if the connection is unreliable or it fails, this is recommended to be switched off. Compression will usually speed up the data transfer. For some forms of data which cannot be compressed (pictures, previously compressed files or encrypted data), compression may not have the desired effect. The supported compression methods are Stac LZS, Microsoft Point-to-Point Compression, and Predictor, and they are negotiated in this order. If the communicator and the remote access server do not agree on the compression method, no compression is used. 2.3.6.1 Script Options (in Other Settings) Script options is used for selecting and editing the login script to be used. If Use login script is set to "Yes", a specified script is run after the data call has been established and before the PPP negotiation. Scripts can be used to authenticate the user on systems which do not support PPP authentication, and to start PPP on terminal servers which do not start it by default. Documentation for scripting syntax will be made available through Forum Nokia (http://www.forum.nokia.com/). If Display terminal window is set to "Yes", a terminal window is opened after the data call establishment which allows the user to see the script execution. If there is a "READ" command in the script, the user can type information in the window that will be sent to the remote host. The scripting and terminal window always use 8 data bits, none parity, one stop bit. 2.3.6.2 Address Options (in Other Settings) Get IP address automatically enables dynamic IP addresses. The remote PPP server will provide the IP address for the communicator during PPP link negotiation. If this option is turned off, the IP address of the communicator must be defined manually before the connection. Most dial-up servers make use of dynamic IP addresses, as this gives a better utilisation of the restricted IP address space and contributes to better security. Copyright  Nokia Corporation 2001-2002. All rights reserved.