The IPSec crypto profile is invoked in IKE
Phase 2. It specifies how the data is secured within the
tunnel when Auto Key IKE is used to automatically generate keys
for the IKE SAs.
Create a new IPSec profile.
for the new profile.
or AH—that you want to apply to secure the data as it traverses
across the tunnel.
As a best practice, select ESP
(Encapsulating Security payload) over AH (Authentication Header)
because ESP offers both confidentiality and authentication for the
connection where as AH offers only authentication.
and select the
for ESP, and
AH, so that the IKE peers can negotiate the keys for the secure
transfer of data across the tunnel.
If you are not certain of what the IKE peers support, add
multiple algorithms in the order of most-to-least secure as follows;
the peers negotiate the strongest supported algorithm to establish
firewall doesn’t support this option),
As a best practice, choose the strongest
authentication and encryption algorithms the peer can support. For
the authentication algorithm, use SHA-256 or higher (SHA-384 or
higher preferred for long-lived transactions). Do not use SHA-512,
SHA-1, or MD5. For the encryption algorithm, use AES; DES and 3DES
are weak and vulnerable.
Select the DH Group to use for the IPSec SA negotiations
in IKE phase 2.
, select the key strength
you want to use:
. For highest security, choose
the group with the highest number.
If you don’t want to renew
the key that the firewall creates during IKE phase 1, select
forward secrecy); the firewall reuses the current key for the IPSec
security association (SA) negotiations.
Specify the duration of the key—time and volume of traffic.
Using a combination of time and traffic volume allows you
to ensure safety of data.
time period for which the key is valid in seconds, minutes, hours,
or days (range is 3 minutes to 365 days). When the specified time
expires, the firewall will renegotiate a new set of keys.
or volume of data after which
the keys must be renegotiated.
Commit your IPSec profile.
Attach the IPSec Profile to an IPSec tunnel configuration.