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Configuring IP Security Services

3-4

304111-A Rev 00

Entering the NPK on the Router

You enter the NPK into a router locally, using the console port and the secure shell

section of the Technician Interface. A password protects access to the secure shell.

You cannot access the NPK or the password using the MIB or the routine

Technician Interface debug commands. Nor can you invoke the secure shell in a

Telnet session.

Entering an NPK and a Seed for Encryption

Before you can add IPsec to a router, you must enter an NPK and create a seed for

encryption using the Technician Interface secure shell. IPsec uses the NPK to

encrypt and decrypt the cipher and integrity keys, and it uses the seed specified

with the

kseed

command to encrypt data.

To enter an NPK and a seed for encryption:

If you do not have a password for the Technician Interface secure shell, you

must create one. Enter

kpassword

<password>.

For password, enter an alphanumeric value up to 16 characters.

At the Technician Interface prompt, type

ksession

to enter the Technician

Interface secure shell. (If you issue the

ksession

command before setting a

password, you will be prompted to do so. Use

kpassword

and step 1.)

Enter the

kseed

command. The secure shell prompts you for a random seed

value.

Type a random set of keystrokes. The secure shell informs you when you have

entered the required number of keystrokes.

Type

kset npk 0x

<NPK_value>.

Type

and the 16-digit hexadecimal NPK value that you assigned to the

router that you are configuring. For more information, see “Generating and

Using NPKs” on page 3-3.

Caution:

Never use a terminal server to enter the NPK. Instead, use a laptop

computer that you can attach directly to the router. Protect the file containing

NPKs on the laptop.

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