40.3. IKE Resource
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40.3. IKE Resource

40.3.1. Activating the IKE resource

Add the resource to the Abilis system with the following command:

[15:50:39] ABILIS_CPX:a res:ike

RES:IKE ALREADY EXISTS

The IKE resource may already exist in the system, but may not yet be active: set it active with the command:

[15:50:43] ABILIS_CPX:s act res:ike

COMMAND EXECUTED
[Caution]Caution

After adding or setting the IKE active, you must restart the Abilis to make the resource running (use the command warm start to reboot the Abilis).

[17:14:59] ABILIS_CPX:s p ike act:yes

COMMAND EXECUTED

[17:15:17] ABILIS_CPX:d p ike

RES:Ike - Not Saved (SAVE CONF), Not Refreshed (INIT) -------------------------
       ------------------------------------------------------------------------
       DESCR:Internet_Keys_Exchange_Protocol
       LOG:DS         ACT:NO          mxps:2048    max-hosts:16
       TOS:0-N        NRTY:3          TB:10
       NATT:AUTO      NATT-N-IKE:YES  NATT-PF:YES  NATT-KA:20
       MODE-CFG-DNS:#
       WDIR:C:\APP\IKE\
       ASN1-DN-SYS:

40.3.2. IKE resource parameters

Use the following command to display the parameters of the resource. The d p ike ? command shows the meaning of parameters.

[09:58:41] ABILIS_CPX:d p ike

RES:Ike -----------------------------------------------------------------------
Run    DESCR:Internet_Keys_Exchange_Protocol
       LOG:DS         ACT:YES         mxps:2048    max-hosts:16
       TOS:0-N        NRTY:3          TB:10
       NATT:AUTO      NATT-N-IKE:YES  NATT-PF:YES  NATT-KA:20
       MODE-CFG-DNS:#
       WDIR:C:\APP\IKE\
       ASN1-DN-SYS:

Meaning of the most important parameters:

LOG

Logging functionalities activation/deactivation.

ACT

Runtime IPSEC activation/deactivation.

mxps

Maximum length of UDP datagram that can be processed.

max-hosts

Maximum number of simultaneous clients [1..255].

TOS

Type Of Service octet or Differentiated Services Field (DS):

-' p-t', i.e. PRECEDENCE and TOS values, where 'p' can be [0..7] and 't' can be [N=None, D=Min. Delay, T=Max. Throughput, R=Max. Reliability, C=Min. Monetary Cost]

- 'bbbbbb', i.e. DS value bit by bit, where 'b' can be [0, 1].

NRTY

Maximum number of packet retransmissions.

TB

Retransmission delay.

WDIR

Working directory; it cannot be empty (physical full path in DOS notation).

NATT

NAT traversal activation. If NAT traversal is enabled, IPsec AH algorithm must be disabled.

NATT-N-IKE

NAT traversal NON-IKE marker activation.

NATT-PF

NAT traversal NAT traversal port floating activation.

NATT-KA

NAT traversal keep-alive timer.

MODE-CFG-DNS

IP address of DNS server for the MODE-CFG mode [#, 1-126.x.x.x, 127.0.0.1, 128-223.x.x.x].

ASN1-DN-SYS

Specifies system Distinguished Name.

The command that allows the configuration of the resource to be modified has the following syntax:

s p ike par:val...

[Caution]Caution

To activate the changes made on the upper case parameters, execute the initialization command init res:ike; while to set act the changes made on the lowercase parameters a save conf and an Abilis restart are required (i.e. with warm start command).

40.3.3. IKE tables

IKE tables define the control and cryptographic characteristics of the Hosts and Clients:

40.3.3.1. Host connections table

The Host connections table can store up to 128 entries, indexed starting from 0 up to 127.

Changes made in the table are activated by executing the command init res:ike.

Commands for handling Host connections table are:

d/a/c/s ike host:"id-num" [par:val...]

The d ike host ? command displays the meaning of parameters.

[18:47:07] ABILIS_CPX:d ike host

- Not Saved (SAVE CONF), Not Refreshed (INIT) ---------------------------------
-------------------------------------------------------------------------------
HOST: NAME:                            LOC-IP:              NATT:   XAUTH:
      AUTH:  HASH: DH:        CIPHER:  REM-IP:              SIDE:   MODE-CFG:
      XAUTH-USER:                      XAUTH-PWD:
-------------------------------------------------------------------------------
0     Agent_01                         080.080.080.080      SYS     NO
      PSK    MD5   MODP1024   3DES     *                    INSIDE  NO

-------------------------------------------------------------------------------


[20:33:37] ABILIS_CPX:d ike host:0

- Not Saved (SAVE CONF), Not Refreshed (INIT) ---------------------------------
Parameter:  | Value:
------------+------------------------------------------------------------------
HOST:         0
NAME:         Agent_01
LOC-IP:       080.080.080.080
REM-IP:       *
NATT:         SYS
AUTH:         PSK
HASH:         MD5
DH:           MODP1024
CIPHER:       3DES
SIDE:         INSIDE
XAUTH:        NO
XAUTH-USER:
XAUTH-PWD:
MODE-CFG:     NO
KEYING-TRIES: 3
LIFE-TIME:    3600
DPD-ENABLE:   NO
DPD-DELAY:    30
DPD-TIMEOUT:  120
DPD-ACTION:   STOP
ID-TYPE:      IP
IP:           080.080.080.080
PEER-ID-TYPE: IP
PEER-IP:      192.168.101.001
-------------------------------------------------------------------------------

Meaning of the most important parameters:

LOC-IP

IP address that IKE will use as source address.

REM-IP

Peer's IP address for this connection.

NATT

NAT traversal activation [SYS, NO, YES, AUTO]

AUTH

Authentication method for the ISAKMP/OAKLEY negotiation [PSK, RSASIG].

HASH

Hash algorithm for the ISAKMP/OAKLEY negotiation [MD5, SHA-1, SHA-256, SHA-384, SHA-512].

DH

Diffi-Hellman group for the ISAKMP/OAKLEY negotiation [MODP768 for Group 1, MODP1024 for Group 2, MODP1536 for Group 5, MODP2048 for Group 14]

CIPHER

Encryption algorithm for the ISAKMP/OAKLEY negotiation [DES, 3DES, IDEA, CAST, BLOWFISH, AES128, AES192, AES256].

SIDE

NAT side assigned to the tunnel [NONE, AUTO, INSIDE, OUTSIDE, VPN, DMZ].

XAUTH

Type of XAUTH [NO, SERVER, CLIENT] (for cisco compatibility).

XAUTH-USER

XAUTH user name for host connection.

XAUTH-PWD

XAUTH password for host connection.

MODE-CFG

Type of Mode config [NO, SRV-PUSH, SRV-REQUEST] (for iphone compatibility).

KEYING-TRIES

Specifies how many times IKE should try to negotiate an SA, either for the first time or for rekeying [INFINITE, 1..100].

LIFE-TIME

Specifies how long IKE will propose that an ISAKMP SA be allowed to live. The range is [600..86400] sec.

DPD-ENABLE

Enables/disables DPD (Dead peer detection) procedure support (the function must necessarily supported by the IPSec client) [NO, YES]. DPD is a keepalive mechanism that enables the router to detect when the connection between the router and a remote IPSec peer has been lost. DPD enables the router to reclaim resources and to optionally redirect traffic to an alternate failover destination. If DPD is not enabled, the traffic continues to be sent to the unavailable destination.

DPD-DELAY

Time interval between DPD checks. It must be lower than DPD-TIMEOUT.

DPD-TIMEOUT

Time interval of missing DPD replies after which peer is declared dead. It must be greater then DPD-DELAY.

DPD-ACTION

Action executed upon peer is detected dead [STOP, RESTART].

ID-TYPE

Type of local host for the connection [AUTO: local ID will be set automatically in run-time as local IP address; IP: local ID is local IP address; FQDN: local ID is fully-qualified domain name (FQDN); USER-FQDN: local ID is fully-qualified user domain name (FQDN)].

IP

Local ID IP address (only for ID-TYPE not equal to AUTO).

FQDN

Local ID fully-qualified domain name (FQDN) or user-FQDN.

PEER-ID-TYPE

Peer's ID type [AUTO, IP, FQDN, USER-FQDN].

PEER-IP

Peer's ID IP address (only for PEER-ID-TYPE not equal to AUTO).

PEER-FQDN

Peer's ID fully-qualified domain name (FQDN) or user-FQDN.

[Note]Note

The FQDN and PEER-FQDN parameters are used as password and they do not have necessarily be referred to existing domains.

40.3.3.2. Client connections table

The Client connections table can store up to 128 entries, indexed starting from 0 up to 127.

Changes made in the table are activated by executing the command init res:ike.

Commands for handling Client connections table are:

d/a/c/s ike cli:"id-num" [par:val...]

The d ike cli ? command displays the meaning of the parameters.

[18:47:32] ABILIS_CPX:d ike cli

- Not Saved (SAVE CONF), Not Refreshed (INIT) ---------------------------------
-------------------------------------------------------------------------------
CLI: NAME:                            HOST-ID: RULE:        LIFE-TIME:    PFS:
     ESP: ESP-CIPHER: ESP-AUTH:       PASSIVE: PERMANENT:   NET-LOC:
     AH:              AH-AUTH:                 TUNNEL:      NET-REM:
     MODE-CFG-DNS:
-------------------------------------------------------------------------------
0    Agent_Cli1                       0        IPSEC        28800         YES
     YES  3DES        MD5             YES      YES          192.168.001.000/24
     NO               MD5                      YES          192.168.101.001/32
     SYS
-------------------------------------------------------------------------------


[20:46:06] ABILIS_CPX:d ike cli:0

- Not Saved (SAVE CONF), Not Refreshed (INIT) ---------------------------------
Parameter:  | Value:
------------+------------------------------------------------------------------
CLI:          0
NAME:         Agent_Cli1
HOST-ID:      0
RULE:         IPSEC
PASSIVE:      YES
PERMANENT:    YES
TUNNEL:       YES
ESP:          YES
ESP-CIPHER:   3DES
ESP-AUTH:     MD5
AH:           NO
AH-AUTH:      MD5
LIFE-TIME:    28800
PFS:          YES
NET-LOC:      192.168.001.000/24
NET-REM:      192.168.101.001/32
MODE-CFG-DNS: SYS
-------------------------------------------------------------------------------

Meaning of the most important parameters:

RULE

Rule for this client connection [BYPASS, DROP, IPSEC]

PASSIVE

Mode of negotiation. [NO: negotiation can be started as initiator and as responder; YES: negotiation can be started as responder only; it is useful for a server]. If related host LOC-IP is set to an “IP resource”, PASSIVE must be forced to NO; if related host REM-IP is set to *, PASSIVE must be forced to YES, even if LOC-IP is set to an “IP resource” .

PERMANENT

Mode of negotiation [NO: after driver starting or after init command (re-)negotiation will not be started automatically as initiator; YES: after driver starting or after init command (re-)negotiation of this connection will be started automatically as initiator].

TUNNEL

Mode of IPSEC negotiation [NO: Transport mode, YES: Tunnel mode].

ESP

Enables/disables IPSEC ESP protocol .

ESP-CIPHER

Encryption algorithm for IPSEC ESP protocol [NONE, DES, 3DES, IDEA, CAST, BLOWFISH, AES128, AES192, AES256].

ESP-AUTH

Authentication algorithm for IPSEC ESP protocol [NONE, MD5, SHA-1, SHA-256, SHA-384, SHA-512].

AH

Enables/disables IPSEC AH protocol.

AH-AUTH

Authentication algorithm for IPSEC AH protocol [MD5, SHA].

LIFE-TIME

Specifies how long IKE will propose that an IPSEC SA be allowed to live. The range is [600..86400] sec.

PFS

Enables/disables Perfect Forward Secrecy. PFS provides additional security by means of a Diffie-Hellman shared secret value. With PFS, if one key is compromised, previous and subsequent keys are secure because they are not derived from previous keys.

NET-LOC

Local subnet address and mask in Slash Notation.

NET-REM

Remote subnet address and mask in Slash Notation.

MODE-CFG-DNS

IP address of DNS server for the MODE-CFG mode.

[Note]Note

More clients can be referred to a same IKE Host.

40.3.3.3. Pre-shared keys table

The Pre-shared keys table can store up to 64 entries, indexed starting from 0 up to 127.

Changes made in the table are activated by executing the command init res:ike.

Commands for handling Host connections table are:

d/a/c/s ike psk:"id-num" [par:val...]

The d ike psk ? command displays the meaning of parameters.

[18:47:53] ABILIS_CPX:d ike psk

-------------------------------------------------------------------------------
PSK: KEY:     ID-TYPE:  IP:             FQDN:
-------------------------------------------------------------------------------
1    ******** ANONYMOUS

Meaning of the most important parameters:

KEY

Specifies preshared key for this record.

ID-TYPE

Type of peer ID [UNDEF, IP, FQDN, USER-FQDN, ANONYMOUS].

IP

Remote IP address.

FQDN

Remote fully-qualified domain name (FQDN) or user-FQDN.

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