Modifies the IP, TCP, UDP, and INET_ACP software on the running
    system.

    Related commands: SET CONFIGURATION COMMUNICATION, SHOW
    COMMUNICATION

    Format

      SET COMMUNICATION  [ /ACCEPT=options ]

                         [ /DOMAIN=domain ]

                         [ /LOCAL_HOST=host ]

                         [ /PROXIES=n ]

                         [ /REJECT=options ]

1  –  Restrictions

    Requires OPER privilege.

2  –  Qualifiers

2.1    /ACCEPT

       /ACCEPT { =[NO]HOSTS=(hosts) | =[NO]NETWORKS=(networks) }

    Optional. Default: All hosts and all networks.

    Accepts communication from the hosts and networks specified.

    Do not specify the same hosts or networks for both /ACCEPT and
    /REJECT.

    To delete an /ACCEPT entry, specify it again using the NOHOSTS or
    NONETWORKS option.

    Specify one of the following:

    o  [NO]HOSTS=hosts

       Hosts that can access TCP/IP Services. Maximum is 32. For
       example:

       /ACCEPT=HOSTS=(host1_name,host2_name, host3_address)

    o  [NO]NETWORKS=networks

       Networks that can access TCP/IP Services. Maximum is 16.

       Use the following syntax:

       NETWORKS=(net1[:net1mask],net2[:net2mask],...)

       For each network, specify: network:[network_mask]. The network
       mask is optional. (Default: class number of your network.
       For example, the default for 11.200.0.0. is 255.0.0.0.). For
       example:

       /ACCEPT=NETWORKS=(net1_name,net2_addr,net3_addr:net3_mask)

2.2    /DOMAIN

       /DOMAIN=domain

    Optional.

    Specifies your system's local domain. This qualifier requires
    either SYSPRV or BYPASS privilege.

2.3    /LOCAL_HOST

       /LOCAL_HOST=host

    Optional.

    Defines the following logical names for the local host:

    o  TCPIP$INET_HOST=host-name

       This logical is always set with the primary host name even if
       the alias name was specified as host.

    o  TCPIP$INET_HOSTADDR=host-IP-address

       If the local host has multiple IP addresses, this logical
       name is set with a name for each address, called TCPIP$INET_
       HOSTADDRn, where n is a number starting at 2.

    This qualifier requires either SYSPRV or BYPASS privilege.

2.4    /PROXIES

       /PROXIES=n

    Optional. Default: Number of communication proxies plus 10, with
    a minimum of 20.

    Specifies the maximum size of the proxy cache. If you plan to add
    entries to the proxy database after you start the TCP/IP Services
    software, set /PROXIES to a value higher than the default.

    You cannot change this value if the TCP/IP Services software is
    running.

2.5    /REJECT

       /REJECT {=[NO]HOSTS=(hosts) | =[NO]NETWORKS=(networks) |

    Optional. Default: No rejections.

    Specifies the hosts or networks that cannot access the TCP/IP
    Services software, including the rejection message that TCP/IP
    might return.

    (For remote login, remote shell, and remote executive, the
    rejection message is preceded by a byte with a value of 1 and
    terminated by a byte with a value of zero.)

    Do not specify the same hosts or networks for both /ACCEPT and
    /REJECT.

    To delete a /REJECT entry, specify it again using the NOHOSTS or
    NONETWORKS option.

    Specify one of the following:

    o  [NO]HOSTS=hosts to list hosts that cannot access TCP/IP
       Services. Maximum is 32. The syntax is:

       /REJECT=HOSTS=(host1_name,host2_name,host3_address)

    o  [NO]NETWORKS=networks to list networks that cannot access
       TCP/IP Services Maximum is 16. The syntax is:

       NETWORKS=(net1[:net1mask],net2[:net2mask],... )

       For each network, specify network:network_mask. The network
       mask is optional. Default: Class number of your network. For
       example, the default for 11.200.0.0. is 255.0.0.0. The syntax
       is:

       /REJECT=NETWORKS=(net1_name,net2_address,net3_addr:net3_mask)

3  –  Examples

    1.TCPIP> SET COMMUNICATION -
      _TCPIP> /REJECT=NETWORK=(16.30.0.0:255.255.0.0,16.40.0.0:255.255.0.0)

      Sets all the services to be inaccessible to the two specified
      networks.