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How to Add a New Pre-Shared Key
If you are using pre-shared keys, you must have one pre-shared key for every policy entry in the ipsecinit.conf file. If you add new policy entries while IPsec and IKE are running, the in.iked daemon can read in new keys. This procedure assumes the following:
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The in.iked daemon is running
The interface that you want to protect with IPsec is an entry in the /etc/hosts file on both systems, for example:
You have added a new policy entry to the /etc/inet/ipsecinit.conf file on both systems. For example, the entry on enigma looks something like the following:
For example, the entry on ada looks something like the following:
You have created a rule for the interface on ada in the /etc/inet/ike/config file on both systems. For example, the rule on enigma looks something like the following:
For example, the rule on ada looks something like the following:
Note –All arguments to auth_method must be on the same line.
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On the system console, become superuser or assume an equivalent role.
Note –Logging in remotely exposes security-critical traffic to eavesdropping. Even if you somehow protect the remote login, the total security of the system is reduced to the security of the remote login session.
Check that the in.iked daemon permits you to change keying material.
You can change keying material if the command returns a privilege level of 0x1 or 0x2. Level 0x0 does not permit keying material operations. By default, the in.iked daemon runs at the 0x0 level of privilege.
If the in.iked daemon does not permit you to change keying material, kill the daemon. After killing the daemon, restart the daemon with the correct privilege level.
For example,
Generate random keys and combine the output to create a key of 64 to 448 bits.
On a Solaris system, you can use the od command.
For an explanation of the command, see How to Generate Random Numbers and the od(1) man page.
By some means, send the key to the administrator of the communicating system.
You are both going to add the same pre-shared key at the same time.
Add the new keying material with the add preshared subcommand in the ikeadm command mode.
id-type
The type of the id.
id
IP address when id-type is IP.
mode
The IKE mode. main is the only accepted value.
key
The pre-shared key in hexadecimal format.
For example, on host enigma, you add the key for the new interface, ada, 192.168.15.7
On host ada, the administrator would add the identical key, as in:
Note –A message of the form Error: invalid preshared key definition indicates that you gave incorrect arguments to the add preshared command. You might have mistyped a parameter. You might have omitted a parameter. Retype the command correctly to add the key.
Exit the ikeadm command mode.
On each system, lower the privilege level of the in.iked daemon.
On each system, activate the ipsecinit.conf file to secure the added interface.
Note –Read the warning when you execute the command. A socket that is already latched, that is, the socket is in use, provides an unsecured back door into the system.
On each system, read in the new rules by using the ikeadm command.
A sample of the new rules for ada and enigma are at the start of the procedure. Because the rules are in the /etc/inet/ike/config file, the name of the file does not have to be specified.
To ensure that IKE pre-shared keys are available at reboot, edit the /etc/inet/secret/ike.preshared file.
Enter the arguments to the add preshared command into the file on each system, as shown in the following substeps.
For example, on the enigma system, you would add the following keying information to the ike.preshared file:
On the ada system, you would add the following keying information to the ike.preshared file:
4 Clear the Pre-shared Key field. The user account password will be used as the preshared key. 5 Select Accept peer ID in dialup group and then select the group name from the list of user groups. Pre-shared keys. Let's start with an easy authentication option: pre-shared keys. For pre-shared key authentication to work, a common key is defined on each host. The key definition binds the key to the remote peer's ISAKMP identity. From a security perspective, the pest practice is to use a unique key. What is the Pre-Shared key and how do I get it? The Pre-Shared Key (sometimes called shared secret) is basically a form of password for your VPN gateway which is set up on your device. The Pre-Shared Key is specific to your gateway and can be found in your device's configuration guide. Vpn pre shared key generator in Description WiFi Password Key Generator These types of keys are necessary when a modem or a router requires you to provide WEP. RFC 6617 Secure PSK Authentication for IKE June 2012 1.Introduction allows for authentication of the IKE peers using a pre- shared key.This exchange, though, is susceptible to dictionary attack and is therefore insecure when used with weak pre-shared keys, such as human-memorizable passwords.