Permission Requirements

Before Installation

Before you start installing Tectia Server for IBM z/OS, make sure the following requirements are met:

File system requirements

Write access to the /opt directory is required during the installation.

User account requirements for installing the server

The user account installing the product must have an OMVS segment, UID 0 and RACF SPECIAL privilege.

User account requirements for running the server

The user account running the server must have an OMVS segment and the UID 0.
If the BPX.DAEMON FACILITY class profile is defined, the user must have read access to it.

Requirements for user accounts to support access via Tectia Server

Required: An OMVS segment
Users who are to have access to in-bound SFTP or SSH require an OMVS segment defined in their profile. If a shell program is specified, it must be the pathname of an executable z/OS UNIX shell program; if omitted, the default shell program defined in z/OS UNIX customization is used.
Optional: A home directory. It is required if public key user authentication is used or if the account requires user-specific configuration, for example, environment variables for the file transfer subsystem.

Requirements for user accounts that run Tectia client programs

Required: An OMVS segment
Optional: A home directory. It is required if public key user authentication is used or if the account requires user-specific configuration, for example, profiles for remote hosts.

Library requirements

The Tectia SSH Assistant application requires the Rexx runtime or Rexx alternate libraries to execute. The Rexx Alternate Library SEAGALT (for example, FAN140.SEAGALT or IBM.REXX.SEAGALT, etc.), which is shipped as part of z/OS since version 1.9, may be used to satisfy this requirement. SEAGALT must be available in the linklist or in a STEPLIB allocated to your TSO session.

Permissions for storing keys in SAF

If the server host key or the user keys are going to be stored in the System Authorization Facility (SAF), additional permissions are required. See Using the z/OS System Authorization Facility for more information.

During Installation

The following additional requirements will be handled during the installation with Tectia SSH Assistant:

The Tectia SSH Assistant ISPF application uses the extattr command to make the server program, /opt/tectia/sbin/sshd2, program-controlled. To issue the command, the user account running the setup must have read access to the BPX.FILEATTR.PROGCTL facility. These requirements will be fulfilled during the installation by running the job generated by the Tectia SSH Assistant option 1.1 INSTUSER.
It is recommended that a user account, SSHD2, is created for running Tectia Server for IBM z/OS. This will be done during the installation by running the job generated by the Tectia SSH Assistant option 1.3 ADDSSHDU.
CEE.SCEERUN and CEE.SCEERUN2 libraries must be available in LPALIB or LNKLST, and CEE.SCEERUN2 must be program-controlled. These requirements will be fulfilled during the installation by running the job generated by the Tectia SSH Assistant option 1.2 CPGMCTL.
The server must be allowed to listen to port 22 (or other configured Secure Shell port). The access will be granted during the installation by running the job generated by the Tectia SSH Assistant option 1.6 SERVAUTH.