EDV:OpenAFS/Install hp ux110

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Getting Started on HP-UX Systems

In this section you build AFS into the HP-UX kernel. Then incorporate AFS modifications into the machine's Pluggable Authentication Module (PAM) system, if you wish to enable AFS login.

Building AFS into the HP-UX Kernel

On HP-UX systems, you must build AFS modifications into a new static kernel; HP-UX does not support dynamic loading. If the machine's hardware and software configuration exactly matches another HP-UX machine on which AFS is already built into the kernel, you can choose to copy the kernel from that machine to this one. In general, however, it is better to build AFS modifications into the kernel on each machine according to the following instructions. 

  1. Move the existing kernel-related files to a safe location.



        # cp /stand/vmunix /stand/vmunix.noafs
        
        # cp /stand/system /stand/system.noafs
        

  2. Mount the AFS CD-ROM for HP-UX on the local /cdrom directory. For instructions on mounting CD-ROMs (either locally or remotely via NFS), see your HP-UX documentation. Then change directory as indicated.



        # cd /cdrom/hp_ux110/root.client
        

  3. Copy the AFS initialization file to the local directory for initialization files (by convention, /sbin/init.d on HP-UX machines). Note the removal of the .rc extension as you copy the file.



        # cp usr/vice/etc/dkload/afs.rc  /sbin/init.d/afs
        

  4. Copy the file afs.driver to the local /usr/conf/master.d directory, changing its name to afs as you do.



        # cp  usr/vice/etc/afs.driver  /usr/conf/master.d/afs
        

  5. Copy the AFS kernel module to the local /usr/conf/lib directory.

Wenn der Kernel mit 32 Bit arbeitet: 

cp bin/libafs.nonfs.a /usr/conf/lib/libafs.a

und mit 64 Bit : 

cp bin/libafs64.nonfs.a /usr/conf/lib/libafs.a

Mit wievielen Bit der aktuelle Kernel arbeitet, kann man mit getconf erfahren: 

# getconf KERNEL_BITS
32



  6. Incorporate the AFS driver into the kernel, either using the SAM program or a series of individual commands.

         * To use the SAM program:

              1. Invoke the SAM program, specifying the hostname of the local machine as local_hostname. The SAM graphical user interface pops up.



                    # sam -display local_hostname:0 
                    

              2. Choose the Kernel Configuration icon, then the Drivers icon. From the list of drivers, select afs.

              3. Open the pull-down Actions menu and choose the Add Driver to Kernel option.

              4. Open the Actions menu again and choose the Create a New Kernel option.

              5. Confirm your choices by choosing Yes and OK when prompted by subsequent pop-up windows. The SAM program builds the kernel and reboots the system.

              6. Login again as the superuser root.



                    login: root
                    Password: root_password
                    

         * To use individual commands:

              1. Edit the file /stand/system, adding an entry for afs to the Subsystems section.

              2. Change to the /stand/build directory and issue the mk_kernel command to build the kernel.



                    # cd /stand/build
                       
                    # mk_kernel
                    

              3. Move the new kernel to the standard location (/stand/vmunix), reboot the machine to start using it, and login again as the superuser root.



                    # mv /stand/build/vmunix_test /stand/vmunix
                       
                    # cd /
                       
                    # shutdown -r now		
                    
                    login: root
                    Password: root_password

Enabling AFS Login on HP-UX Systems

At this point you incorporate AFS into the operating system's Pluggable Authentication Module (PAM) scheme. PAM integrates all authentication mechanisms on the machine, including login, to provide the security infrastructure for authenticated access to and from the machine.

Explaining PAM is beyond the scope of this document. It is assumed that you understand the syntax and meanings of settings in the PAM configuration file (for example, how the other entry works, the effect of marking an entry as required, optional, or sufficient, and so on).

The following instructions explain how to alter the entries in the PAM configuration file for each service for which you wish to use AFS authentication. Other configurations possibly also work, but the instructions specify the recommended and tested configuration. Note: The instructions specify that you mark each entry as optional. However, marking some modules as optional can mean that they grant access to the corresponding service even when the user does not meet all of the module's requirements. In some operating system revisions, for example, if you mark as optional the module that controls login via a dial-up connection, it allows users to login without providing a password. See the IBM AFS Release Notes for a discussion of any limitations that apply to this operating system.

Also, with some operating system versions you must install patches for PAM to interact correctly with certain authentication programs. For details, see the IBM AFS Release Notes.

The recommended AFS-related entries in the PAM configuration file make use of one or more of the following three attributes.

try_first_pass 

   This is a standard PAM attribute that can be included on entries after the first one for a service; it directs the module to use the password that was provided to the first module. For the AFS module, it means that AFS authentication succeeds if the password provided to the module listed first is the user's correct AFS password. For further discussion of this attribute and its alternatives, see the operating system's PAM documentation.

ignore_root 

   This attribute, specific to the AFS PAM module, directs it to ignore not only the local superuser root, but also any user with UID 0 (zero).

setenv_password_expires 

   This attribute, specific to the AFS PAM module, sets the environment variable PASSWORD_EXPIRES to the expiration date of the user's AFS password, which is recorded in the Authentication Database.

Perform the following steps to enable AFS login. 

  1. Mount the AFS CD-ROM for HP-UX on the /cdrom directory, if it is not already. Then change directory as indicated.



        # cd /usr/lib/security
        

  2. Copy the AFS authentication library file to the /usr/lib/security directory. Then create a symbolic link to it whose name does not mention the version. Omitting the version eliminates the need to edit the PAM configuration file if you later update the library file.

     If you use the AFS Authentication Server (kaserver process) in the cell:



        # cp /cdrom/hp_ux110/lib/pam_afs.so.1  .
       
        # ln -s  pam_afs.so.1  pam_afs.so   

     If you use a Kerberos implementation of AFS authentication:



        # cp /cdrom/hp_ux110/lib/pam_afs.krb.so.1   .
       
        # ln -s pam_afs.krb.so.1 pam_afs.so
        

  3. Edit the Authentication management section of the HP-UX PAM configuration file, /etc/pam.conf by convention. The entries in this section have the value auth in their second field.

     First edit the standard entries, which refer to the HP-UX PAM module (usually, the file /usr/lib/security/libpam_unix.1) in their fourth field. For each service for which you want to use AFS authentication, edit the third field of its entry to read optional. The pam.conf file in the HP-UX distribution usually includes standard entries for the login and ftp services, for instance.

     If there are services for which you want to use AFS authentication, but for which the pam.conf file does not already include a standard entry, you must create that entry and place the value optional in its third field. For instance, the HP-UX pam.conf file does not usually include standard entries for the remsh or telnet services.

     Then create an AFS-related entry for each service, placing it immediately below the standard entry. The following example shows what the Authentication Management section looks like after you have you edited or created entries for the services mentioned previously. Note that the example AFS entries appear on two lines only for legibility.



        login   auth  optional  /usr/lib/security/libpam_unix.1
        login   auth  optional  /usr/lib/security/pam_afs.so      \
              try_first_pass  ignore_root  setenv_password_expires
        ftp     auth  optional  /usr/lib/security/libpam_unix.1
        ftp     auth  optional  /usr/lib/security/pam_afs.so      \
              try_first_pass  ignore_root
        remsh   auth  optional  /usr/lib/security/libpam_unix.1
        remsh   auth  optional  /usr/lib/security/pam_afs.so      \
              try_first_pass  ignore_root		
        telnet  auth  optional  /usr/lib/security/libpam_unix.1
        telnet  auth  optional  /usr/lib/security/pam_afs.so      \
              try_first_pass  ignore_root  setenv_password_expires
        

  4. If you use the Common Desktop Environment (CDE) on the machine and want users to obtain an AFS token as they log in, also add or edit the following four entries in the Authentication management section. Note that the AFS-related entries appear on two lines here only for legibility.



        dtlogin   auth  optional  /usr/lib/security/libpam_unix.1
        dtlogin   auth  optional  /usr/lib/security/pam_afs.so     \
              try_first_pass  ignore_root
        dtaction  auth  optional  /usr/lib/security/libpam_unix.1
        dtaction  auth  optional  /usr/lib/security/pam_afs.so     \
              try_first_pass  ignore_root
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