Configuring the IPSec Settings

By using IPSec, you can prevent third parties from intercepting or tampering with IP packets transported over the IP network. Because IPSec adds security functions to IP, a basic protocol suite used for the Internet, it can provide security that is independent of applications or network configuration. To perform IPSec communication with this machine, you must configure settings such as the application parameters and the algorithm for authentication and encryption. Administrator or NetworkAdmin privileges are required in order to configure these settings. Check the system requirements before performing the procedure below. Specifications
Communication mode
This machine only supports transport mode for IPSec communication. As a result, authentication and encryption is only applied to the data portions of IP packets.
Key exchange protocol
This machine supports Internet Key Exchange version 1 (IKEv1) for exchanging keys based on the Internet Security Association and Key Management Protocol (ISAKMP). For the authentication method, set either the pre-shared key method or the digital signature method.
When setting the pre-shared key method, you need to decide on a passphrase (pre-shared key) in advance, which is used between the machine and the IPSec communication peer.
When setting the digital signature method, use a CA certificate and a PKCS#12 format key and certificate to perform mutual authentication between the machine and the IPSec communication peer. For more information on registering new CA certificates or keys/certificates, see Registering a Key and Certificate for Network Communication. Note that SNTP must be configured for the machine before it uses this method. Making SNTP Settings
1
Press .
2
Press <Preferences>  <Network>  <TCP/IP Settings>  <IPSec Settings>.
3
Set <Use IPSec> to <On>, and press <Register>.
4
Specify a name for the policy.
Press <Policy Name>, enter the name, and press <OK>.
5
Configure the IPSec application parameters.
1
Press <Selector Settings>.
2
Specify the IP address to apply the IPSec policy to.
Specify the IP address of this machine in <Local Address>, and specify the IP address of the communication peer in <Remote Address>.

<All IP Addresses>
IPSec is applied to all sent and received IP packets.
<IPv4 Address>
IPSec is applied to IP packets sent to and received from the IPv4 address of this machine.
<IPv6 Address>
IPSec is applied to IP packets sent to and received from the IPv6 address of this machine.
<All IPv4 Addresses>
IPSec is applied to IP packets sent to and received from the IPv4 address of the communication peer.
<All IPv6 Addresses>
IPSec is applied to IP packets sent to and received from the IPv6 address of the communication peer.
<IPv4 Manual Settings>
Specify the IPv4 address to apply IPSec to.
Select <Single Address> to enter an individual IPv4 address.
Select <Address Range> to specify a range of IPv4 addresses. Enter a separate address for <First Address> and <Last Address>.
Select <Subnet Settings> to specify a range of IPv4 addresses using a subnet mask. Enter separate values for <Address> and <Subnet Mask>.
<IPv6 Manual Settings>
Specify the IPv6 address to apply IPSec to.
Select <Single Address> to enter an individual IPv6 address.
Select <Address Range> to specify a range of IPv6 addresses. Enter a separate address for <First Address> and <Last Address>.
Select <Specify Prefix> to specify a range of IPv6 addresses using a prefix. Enter separate values for <Address> and <Prefix Length>.
3
Specify the port to apply IPSec to.
Press <Specify by Port Number> to use port numbers when specifying the ports that IPSec applies to. Select <All Ports> to apply IPSec to all port numbers. To apply IPSec to a specific port number, press <Single Port> and enter the port number. After specifying the ports, press <OK>. Specify the port of this machine in <Local Port>, and specify the port of the communication peer in <Remote Port>.
Press <Specify by Service Name> to use service names when specifying the ports that IPSec applies to. Select the service in the list, press <Service On/Off> to set it to <On>, and press <OK>.
4
Press <OK>.
6
Configure the authentication and encryption settings.
1
Press <IKE Settings>.
2
Configure the necessary settings.
<IKE Mode>
Select the operation mode for the key exchange protocol. Security is enhanced if you select <Main> because the IKE session itself is encrypted, but the speed of the session is slower than with <Aggressive>, which does not encrypt the entire session.
<Authentication Method>
Select one of the authentication methods described below.
<Pre-Shared Key Method>
Set the same passphrase (pre-shared key) that is set for the communication peer. Press <Shared Key>, enter the character string to use as the shared key, and press <OK>.
<Digital Sig. Method>
Set the key and certificate to use for mutual authentication with the communication peer. Press <Key and Certificate>, select the key and certificate to use, and press <Set as Default Key>  <Yes>  <OK>.
<Authentication/Encryption Algorithm>
Select either <Auto> or <Manual Settings> to set how to specify the authentication and encryption algorithm for IKE phase 1. If you select <Auto>, an algorithm that can be used by both this machine and the communication peer is set automatically. If you want to specify a particular algorithm, select <Manual Settings> and configure the settings below.
<Authentication>
Select the hash algorithm.
<Encryption>
Select the encryption algorithm.
<DH Group>
Select the group for the Diffie-Hellman key exchange method to set the key strength.
3
Press <OK>.
7
Configure the IPSec communication settings.
1
Press <IPSec Network Settings>.
2
Configure the necessary settings.
<Validity>
Set a period of validity for the generated IKE SA and IPSec SA. Make sure to set either <Time> or <Size>. If you set both, the period of validity ends when either value is reached.
<PFS>
If you set the Perfect Forward Secrecy (PFS) function to <On>, the secrecy of the encryption key is increased, but the communication speed is slower. In addition, the PFS function must be enabled on the communication peer device.
<Authentication/Encryption Algorithm>
Select either <Auto> or <Manual Settings> to set how to specify the authentication and encryption algorithm for IKE phase 2. If you select <Auto>, the ESP authentication and encryption algorithm is set automatically. If you want to specify a particular authentication method, press <Manual Settings> and select one of the authentication methods below.
<ESP>
Authentication and encryption are both performed. Select the algorithm for <ESP Authentication> and <ESP Encryption>. Select <NULL> if you do not want to set the authentication or encryption algorithm.
<ESP (AES-GCM)>
AES-GCM is used as the ESP algorithm, and authentication and encryption are both performed.
<AH (SHA1)>
Authentication is performed, but data is not encrypted. SHA1 is used as the algorithm.
3
Press <OK> <OK>.
8
Enable the registered policies and check the order of priority.
Select the registered policies from the list, and press <Policy On/Off> to turn them <On>.
Policies are applied in the order that they are listed, starting at the top. If you want to change the order of priority, select a policy in the list and press <Raise Priority> or <Lower Priority>.
If you do not want to send or receive packets that do not correspond to the policies, select <Reject> for <Receive Non-Policy Packets>.
9
Press <OK>.
10
Press     <Apply Set. Changes>  <Yes>.
Managing IPSec policies
You can edit policies on the screen displayed in step 3.
To edit the details of a policy, select the policy in the list and press <Edit>.
To disable a policy, select the policy in the list and press <Policy On/Off>.
To delete a policy, select the policy in the list and press <Delete>  <Yes>.
13WR-0AY