Title: Telnet Console
{note} Availability: Since OpenEJB 0.9{note}

<a name="TelnetConsole-BasicUsage"></a>
# Basic Usage

To use OpenEJB's Telnet Console, simply boot your server normally.

> $ ./bin/openejb start


    OPENEJB_HOME=/Users/dblevins/Desktop/openejb-1.0
    OpenEJB 1.0    build: 20060226-1701
    http://www.openejb.org
    resources 1
    OpenEJB ready.
    [init]
 OpenEJB Remote Server
      ** Starting Services **
      NAME		       IP	       PORT  
      webadmin	       0.0.0.0	       4203  
      httpejbd	       0.0.0.0	       4204  
      telnet	       0.0.0.0	       4202  
      ejbd		       0.0.0.0	       4201  
      admin 	       0.0.0.0	       4200  
    -------
    Ready!



Then in another shell telnet in 

> $ telnet localhost 4202

    Trying ::1...
    Connected to localhost.
    Escape character is '^]
'.
    OpenEJB Remote Server Console
    type 'help' for a list of commands
    [openejb]
$ help 
     stop
     exit
     system
     version
     lookup
     help
    [openejb]
$ system
    Containers:
     Default BMP Container
     Default CMP Container
     Default Stateful Container
     Default Stateless Container
    
    Deployments:
     client/tests/stateful/EncBean
     client/tests/entity/cmp/RMI-over-IIOP/EJBHome
     client/tests/stateful/BasicStatefulHome
     ClientTools/ViewClass
     Webadmin/Configuration
     EJBGenerator/CreateEJB
     ClientTools/InvokeObject
     Webadmin/Properties
     client/tests/stateful/RMI-over-IIOP/EJBHome
     Webadmin/Home
     client/tests/entity/bmp/allowed_operations/EntityHome
     client/tests/entity/cmp/EncBean
     httpd/DefaultBean
     client/tests/stateful/BeanManagedBasicStatefulHome
     client/tools/DatabaseHome
     client/tests/entity/bmp/EncBean
     config/webadmin/ConfigurationData
     deploy/webadmin/Deployer
     ClientTools/ViewJndi
     Webadmin/DeploymentList
     client/tests/stateless/BeanManagedBasicStatelessHome
     Webadmin/CMPMapping
     client/tests/stateless/EncBean
     client/tests/stateful/BeanManagedTransactionTests/EJBHome
     client/tests/entity/bmp/RMI-over-IIOP/EJBHome
     Webadmin/ListLogs
     client/tests/stateless/BeanManagedTransactionTests/EJBHome
     ClientTools/ViewEjb
     client/tests/entity/bmp/BasicBmpHome
     mapping/webadmin/CMPMappingData
     client/tests/stateless/BasicStatelessHome
     client/tests/entity/cmp/BasicCmpHome
     Webadmin/Deployment
     httpd/session
     client/tests/entity/cmp/allowed_operations/EntityHome
     client/tests/stateless/RMI-over-IIOP/EJBHome
    [openejb]
$ exit
    Connection closed by foreign host.


<a name="TelnetConsole-ConfiguringtheTelnetService"></a>
#  Configuring the Telnet Service

The configuration of all server services (network facing services) is done
in xinet.d style config files.	The telnet shell is controlled via the
$OPENEJB_HOME/conf/telnet.properties file.  This file is created for you
automatically after the first time OpenEJB boots.

> $ cat conf/telnet.properties 

        server	= org.openejb.server.telnet.TelnetServer
        bind	= 127.0.0.1
        port	= 4202
        disabled	= false
        threads	= 5
    #   only_from	= 192.168.1.123


You can change the IP, port, and even the number of threads allowed to
concurrently access the Telnet service via this file.

<a name="TelnetConsole-DisablingtheTelnetService"></a>
#  Disabling the Telnet Service

Simply edit the config file and set 'disabled' to true


        disabled	= true


Then restart OpenEJB.

<a name="TelnetConsole-RestrictingAccess"></a>
#  Restricting Access

It is unlikely you want just anyone to be able to login and execute
commands.  While you can't restrict access on a user basis, yet, you can
restrict access to specific hosts.  Host based access control (HBA) is a
built-in part of any Server Service in OpenEJB and the Telnet Service is no
different.   This is done with the 'only_from' property, which like the
rest of the file is a direct copy of the xinet.d syntax for HBA.  

For an example to restrict access to the localhost, you could configure the
Telnet Service like this:


        server	= org.openejb.server.telnet.TelnetServer
        bind	= 127.0.0.1
        port	= 4202
        disabled	= false
        threads	= 5
        only_from	= localhost


If you wanted to restrict access to localhost *and* say the hosts
192.168.1.207 and 192.168.1.16, you can simply add them to the list.


        server	= org.openejb.server.telnet.TelnetServer
        bind	= 127.0.0.1
        port	= 4202
        disabled	= false
        threads	= 5
        only_from	= localhost, 192.168.1.207, 192.168.1.16