|Communications Access Methods for SAS/CONNECT and SAS/SHARE Software|
|System and Software Requirements for SAS/CONNECT and SAS/SHARE|
Ensure that the following conditions have been met:
Specify the host name during the IBM TCP/IP configuration process. If you omit the host name when you sign on with SAS/CONNECT or with SAS/SHARE, you will receive the following error message:
ERROR: Access method initialization failed.
|Setting SAS Options and Variables|
You may need to set specific options to establish the connections that you want with SAS/CONNECT and SAS/SHARE when using the TCP/IP communications access method.
Consult with your network administrator to determine what options must be set and what values to assign to them.
You may specify an option in several forms, as follows:
OPTIONS SET=variable value;
options set=tcpsec _secure_;
-SET option-name value
-set tcpsec _secure_
Values for these options may contain up to eight characters, consisting of alphanumeric characters, the percent sign (%), the dollar sign ($), the pound sign (#), and the at sign (@).
If you set multiple forms of the same option, here is the order of precedence that is followed:
|SAS macro variable|
|SAS configuration file|
|DOS environment variable.|
Note: If you set the same option using different forms, typically the
last option setting will take precedence and override an earlier option setting.
To display the settings of the SAS system options in the SAS log, use the OPTIONS procedure. The following statement produces a list of options with a brief explanation of what each option does:
proc options; run;
|Setting Security for SAS/CONNECT and SAS/SHARE|
For SAS/CONNECT, you must
supply identifying information to sign on
without a script to a remote host running a spawner program. A SAS/SHARE server,
running secured, requires identification from each connecting client. The
next two sections outline the version-specific methods for specifying client
identification for SAS/CONNECT and SAS/SHARE. The third section describes
how to configure your SAS/SHARE server to either require or not require connecting
clients to supply user identification.
In Version 8, you provide client identification to a SAS/CONNECT remote host or a SAS/SHARE server using the USER= and PASSWORD= options. These options are valid in the following statements:
Connect to Remote
Specifying client identification in the TCPSEC variable is still accepted but is not recommended in Version 8. The USER= and PASSWORD= options take precedence over the client TCPSEC option when both are specified. For example, a SAS/SHARE client's execution of a LIBNAME statement with values assigned to the USER= and PASSWORD= options would override a TCPSEC option setting in the same client SAS session.
Here is the syntax and definitions for these options:
|USER | USERNAME | USERID | UID=username | _PROMPT_|
|PASSWORD | PASSWD | PASS | PWD | PW=password | _PROMPT_|
Specifying these options allows a user on the local host whose username and password have been verified to access the remote host.
Note: The values provided
when prompted must NOT be quoted.
Specifying USER=_PROMPT_ and omitting the PASSWORD= specification will cause SAS to prompt you for both userid and password.
This is especially useful for allowing the SAS statements containing the USER= and PASSWORD= options to be copied and otherwise effectively reused by others.
For SAS/SHARE, the values supplied for the USER= and PASSWORD= options are valid for the duration of the remote host connection. Additional accesses of the remote host while the connection to that host is still in effect do not require re-supplying of the USER= and PASSWORD= options. For example, while the first connecting library assign to a SAS/SHARE server may require specification of the options, subsequent assigns to the same server will not need specification of these options as long as the original connection is in effect. A subsequent re-connect to the same server or connect to a different server would require re-supplying of the USER= and PASSWORD= options.
Here is a Version 8 example for SAS/SHARE:
libname test 'prog2 a' user=joeblue password="2muchfun" server=share1;
For SAS/CONNECT, these values are valid until SIGNOFF.
Here is a Version 8 example for SAS/CONNECT:
signon rmthost user=joeblack password=born2run;
As a security precaution, PASSWORD= field entries echoed in the log
are replaced with Xs. If _PROMPT_ was specified for entering the password,
the entry would not be displayed on the screen as it is typed.
In Version 6 and Version 7, you provide client identification to a SAS/CONNECT remote host or a SAS/SHARE server using the TCPSEC option. TCPSEC must be defined on the local host before you connect to the remote host (using the SIGNON statement) or access a SAS/SHARE server (using the LIBNAME statement).
Here is the syntax and description of this option.
|TCPSEC=userid.password | _PROMPT_|
Note: The values provided when prompted must NOT
This technique is especially useful when the configuration file specifying this option is shared among many users.
options set=tcpsec bass.time2go; options set=tcpsec _prompt_;
The TCPSEC option also specifies whether the TCP/IP access method performs user authentication before connecting to a SAS/SHARE server. The TCPSEC option must be set on the server before you start the SAS/SHARE server.
Here is the syntax and description of this option.
|TCPSEC=_SECURE_ | _NONE_|
options set=tcpsec _secure_; options set=tcpsec _none_;
|SAS/CONNECT Only Options|
The TCPPORTFIRST and TCPPORTLAST SAS options restrict the range of TCP/IP ports through which local hosts can remotely connect to remote hosts.
These options must be set at the SAS/CONNECT remote host.
Define the range of TCP/IP ports by assigning a beginning range value to TCPPORTFIRST and an ending range value to TCPPORTLAST, within the range of 0 through 32767.
Consult with your network administrator for advice about these settings.
Use the following syntax for the configuration file:
-TCPPORTFIRST n -TCPPORTLAST nUse the following syntax for the AUTOEXEC file:
OPTIONS TCPPORTFIRST=n; OPTIONS TCPPORTLAST=n;
In the following example, the local host is restricted to TCP/IP ports 4020 through 4050 when making a remote host connection:
options tcpportfirst=4020; options tcpportlast=4050;
To restrict the range of ports to only one port, you may set the TCPPORTFIRST and TCPPORTLAST options to the same number.
Note: At the remote host, you may set TCPPORTFIRST and TCPPORTLAST at
a SAS invocation or in the configuration file.
TCPTN3270 is an environment variable that is set on the local host to support a connection to an OS/390 or CMS host that uses full-screen 3270 TELNET protocol. The following script files are provided:
See Identifying a Script File for Signing On and Signing Off for more information.
Set TCPTN3270 to the value of 1 at the OS/2 local host in the SAS configuration file or in an OPTIONS statement.
To set the TCPTN3270 variable, enter the following command on the OS/2 local host:
-set tcptn3270 1
Top of Page
Copyright 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.