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AIX Version 4.3 Commands Reference, Volume 3

ike Command

Purpose

Starts IP Security dynamic tunnels using Internet Key Exchange Protocol (ISAKMP/Oakley).

Syntax

ike cmd=Subcommand [ parameter ... ]

Description

The ike is used to start IP Security dynamic tunnels using the Internet Key Exchange (IKE) protocol. IP Security tunnels protect IP traffic by authenticating and/or encrypting IP data. The ike command performs several functions. It can activate, remove, or list IKE and IP Security tunnels. For an overview of IP Security and IKE tunnels, see IP Security in the AIX Version 4.3 System Management Guide: Communications and Networks.
Note: You must have root access to use the ike command.
The IKE negotiation occurs in two phases. The first phase authenticates the two parties and sets up a phase 1 Security Association for protecting the data that is passed during the negotiation. In this phase the key management policy is used to secure the negotiation messages. The second phase negotiates the phase 2 Security Association, which uses the data management policy to set up IP Security tunnels in the kernel for encapsulating and decapsulating data packets. The secure channel established in phase 1 can be used to protect multiple data management negotiations between 2 hosts.

The ike command is used to activate tunnels with identification and policy information which has already been entered using the Web-based System Management Graphical User Interface (GUI) under Virtual Private Networks (IP Security) in the Network application. The parameters to be used during the negotiation are entered by the user and stored in a database. The ike command allows the activation, removal and listing of tunnels that have been started using the security parameters stored in the database.

In most uses of the ike command, activation and deletion occurs for both phases, however the command allows these operations to be done separately.

Subcommands

activate
Purpose Start the negotiation of an IKE tunnel. If phase is not specified, both a phase 1 and phase 2 tunnel are started. If IP addresses are supplied, the tunnel is setup using those IP addresses. If the IDs used during the negotiation are not IP addresses, the local and remote host IDs must be entered using the Virtual Private Networks Web-based System Management Graphical User Interface (GUI) panels. A unique tunnel number is created. The tunnel can then be referenced by the tunnel number in the ike command to indicate the particular tunnel to be started.
Syntax ike cmd=activate [ phase=1|2 ] [numlist=tunnel_num_list] [ipaddr=src_addr,dst_addr]  [autostart]
Description The activate subcommand works using a two phase paradigm. A phase 1 tunnel must be established before a phase 2 tunnel can be started. If a phase 1 tunnel is specified, then only the phase 1 tunnel negotiation take place. If a phase 2 tunnel is specified, then the system checks for the existence of the corresponding phase 1 tunnel before creating the phase 2 tunnel. If the phase 1 negotiation has not been started, it is started automatically.

Upon successful completion of a phase 2 tunnel, the tunnel definition and corresponding filter rules are inserted into the kernel, and the new tunnel is activated. Traffic described by the tunnel definition passing between the designated endpoints are protected by the encryption and authentication algorithms indicated by the associated IKE security policy.

Multiple phase 2 tunnels can be started under the same phase 1 tunnel. A situation where this may be desired is if different types of traffic between two endpoints need different levels of security protection. The Security Association used for the phase 1 tunnel can be shared by multiple phase 2 tunnels. The phase 2 tunnels would specify the type of traffic (by protocol and port, or subnet mask, for instance) and could have different security policies protecting them.

The ike command returns if either a negotiation has been initiated, an error returns, or the tunnel already exists. Since the remote host must be contacted during the negotiation and the amount of time needed to complete the negotiation is uncertain, the list subcommand should be used to determine if the negotiation was successful.

Errors that are detected during the negotiation process can be captured by using syslog.

Flags
phase
Specifies the type of negotiation desired. If omitted, the activate subcommand activates both a phase 1 and phase 2 tunnel. The phase flag is an optional flag.
numlist
Initiates the ike tunnel number which corresponds to the desired phase 1 or phase 2 tunnel(s) to be started. The , (comma) and - (dash) characters can be used to delimit values and indicate ranges. The list subcommand with the database option db can be used to determine the tunnel number for a particular tunnel. An example using tunnel numbers is shown below: 
ike cmd=activate numlist=1,3,5-7

This would start tunnels 1, 3, 5, 6 and 7.

ip_addr
Starts a phase 1 or phase 2 tunnel between the specified IP Addresses.
autostart
Causes the activation of all phase 1 and phase 2 tunnel database entries which were created with the autostart parameter set. The autostart flag does not work in conjunction with any other flags pertaining to the activate subcommand.
Examples
  1. To activate a phase 2 tunnel between source IP address x.x.x.x and destination IP address y.y.y.y, enter: 
    ike cmd=activate phase=2 ipaddr=x.x.x.x,y.y.y.y

    The security policy indicated in the data base for the IP addresses x.x.x.x and y.y.y.y is used for activating the tunnel.

  2. To activate phase 1 tunnels for tunnels 1 and 2, enter: 
    ike cmd=activate phase=1 numlist=1,2
  3. To activate phase 2 tunnels for inactive tunnels 3, 4, 5, and 8 from the database enter: 
    ike cmd=activate phase=2 numlist=3-5,8

    Note: Because each phase 2 tunnel must have an associated phase 1 tunnel, a phase 1 tunnel is automatically activated before the phase 2 tunnel is activated.

list
Purpose Monitors the status of IP Security tunnels by phase.
Syntax ike cmd=list [phase=1|1+|2] [numlist= tunnel_num_list] [db | role=i|r] [verbose]
Description The list subcommand queries the Tunnel Manager and lists phase 1 and phase 2 tunnel status and information according to the result of the query. This command can also be used to view information in the Tunnel Definition database. The default behavior is to list the tunnels currently active. To list the tunnels in the database, the db option must be used.
Flags
phase
Indicates the type and order of the tunnel(s) to be listed. A phase value of 1 results in only the requested phase 1 tunnel information being displayed. A phase value of 2 results in the information for the requested phase 2 tunnel(s) and their associated phase 1 tunnel(s) should be displayed. A phase value of 1+ means that the requested phase 1 tunnel and all associated phase 2 tunnels should be displayed. The default phase value is 1+.
numlist
Lists of the tunnel numbers which you would like to view. If omitted, the information from all tunnels is displayed. The , (comma) and - (dash) characters can be used to delimit values and indicate ranges. For example: 
ike cmd=list numlist=1,3,5-7

When used in conjunction with db, tunnels from the IKE Security Policy database are shown.

Note: Active tunnel numbers and tunnel numbers from the IKE Tunnel Definitions database do not necessarily match up. This is due to the fact that active tunnel numbers must reflect tunnels from the initiator and responder mode.

db
Shows the entries in the database. If this flag is omitted, only active tunnels is displayed. This cannot be used in conjunction with role. Supply the list of tunnel numbers which you would like to view.
role
Allows the display of tunnels by the point of initiation. If i is specified, then the tunnels that were initiated by the local host are displayed. If r is specified, then the tunnels where the local host acted as a responder are displayed. If this flag is omitted, both initiator and responder tunnels are shown. This flag cannot be used in conjunction with db.
verbose
Shows extended information about the specified tunnels. If this flag is not specified, then only a concise entry for each tunnel is shown.
Examples Note: Tunnel numbers from the database and tunnel numbers from the tunnel manager do not necessarily reflect the same tunnel.
  1. To perform a concise (short form) listing of phase 1 tunnels with entries in the tunnel manger, enter: 
    ike cmd=list phase=1 numlist=1,2,3

    These tunnels are either being negotiated, in the active state , or have expired. Only tunnels 1, 2, and 3 are listed. Tunnels can be either initiator or responder role.

  2. To perform a concise (short form) listing of of the specified phase 2 tunnels in the database with each preceded by the associated phase 1 tunnel, enter: 
    ike cmd=list phase=2 numlist=1-3 db

    These are tunnels defined in the data-base which may or may not be currently active in the tunnel manager. All tunnels in the database are used in the initiator role only.

  3. To perform a verbose (long form) listing of a phase one tunnel followed by all of its associated phase two tunnels from the tunnel manager, enter: 
    ike cmd=list phase=1+ role=r verbose

    Only tunnels which were activated in the responder role are listed. All available tunnel numbers are listed since no numlist was specified.

remove
Purpose Deactivates specified phase 1 or phase 2 tunnel(s) and optionally removes an entry from the IKE Tunnel Definition database.
Syntax ike cmd=remove [phase=1|2] [numlist= tunnel_num_list] [db]
Description The remove subcommand requests the deactivation of phase 1 or phase 2 tunnel(s). Because phase 2 tunnels are associated with a phase 1 tunnel, if a phase 1 tunnel is removed, all phase 2 tunnels under the phase 1 tunnel are not refreshed when the phase 2 tunnel lifetime expires. This subcommand can also be used to remove entries from the IKE Tunnel Definition database. If a phase 1 tunnel entry is removed, then any associated phase 2 tunnels is also removed.
Flags
phase
Indicates the phase of the tunnel to be deactivated and must be specified. A phase value of 1 refers to a phase 1 tunnel and a phase value of 2 refers to a phase 2 tunnel.
numlist
List the tunnel numbers you would like to remove. The , (comma) and - (dash) characters can be used to delimit values and indicate ranges. For example: 
ike cmd=remove numlist=1,3,5-7

When numlist is omitted, all tunnels are deactivated or removed from the database.

db
Removes entries from the IKE Tunnel Definition database.
all
Removes all entries from the IKE Tunnel Definition database.
Examples
  1. To deactivate phase 1 tunnels numbered 1, 2, and 3, enter: 
    ike cmd=remove phase=1 numlist=1-3
  2. To remove all phase 1 tunnels in the IKE Tunnel Definition database, enter: 
    ike cmd=remove phase=1 db all

    Note: Use this command with extreme caution.

    Since a phase 2 tunnel cannot exist in the database without an associated phase 1 tunnel, whenever a phase 1 tunnel is removed, all phase 2 tunnels associated with it are also removed from the database. Since the all parameter was specified, all phase 1 tunnels are removed from the database, along with all associated phase 2 tunnels.

  3. To remove all phase 1 and phase 2 tunnels, enter: 
    ike cmd=remove all
  4. To remove all phase 2 tunnels but keep all phase 1 tunnels active, enter: 
    ike cmd=remove phase=2 all
  5. To deactivate all phase 1 tunnels (corresponding phase 2 tunnels will not be refreshed), enter: 
    ike cmd=remove phase=1 all

Files

/usr/sbin Location of the ike admin commands.

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