Network > Network Profiles > IPSec Crypto

Select
Network
Network Profiles
IPSec Crypto
to configure IPSec Crypto profiles that specify protocols and algorithms for authentication and encryption in VPN tunnels based on IPSec SA negotiation (Phase 2).
For VPN tunnels between GlobalProtect gateways and clients, see Network > Network Profiles > GlobalProtect IPSec Crypto.
IPSec Crypto Profile Settings
Description
Name
Enter a
Name
to identify the profile (up to 31 characters). The name is case-sensitive and must be unique. Use only letters, numbers, spaces, hyphens, and underscores.
IPSec Protocol
Select a protocol for securing data that traverses the VPN tunnel:
  • ESP
    —Encapsulating Security Payload protocol encrypts the data, authenticates the source, and verifies data integrity.
  • AH
    —Authentication Header protocol authenticates the source and verifies data integrity.
Encryption (
ESP protocol only
)
Click
Add
and select the desired encryption algorithms. For highest security, use
Move Up
and
Move Down
to change the order (top to bottom) to the following:
aes-256-gcm
,
aes-256-cbc
,
aes-192-cbc
,
aes-128-gcm
,
aes-128-ccm
(the VM-Series firewall doesn’t support this option),
aes-128-cbc
,
3des
, and
des
. You can also select
null
(no encryption).
Authentication
Click
Add
and select the desired authentication algorithms. For highest security, use
Move Up
and
Move Down
to change the order (top to bottom) to the following:
sha512
,
sha384
,
sha256
,
sha1
,
md5
. If the
IPSec Protocol
is
ESP
, you can also select
none
(no authentication).
DH Group
Select the Diffie-Hellman (DH) group for Internet Key Exchange (IKE):
group1
,
group2
,
group5
,
group14
,
group19
, or
group20
. 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
no-pfs
(no perfect forward secrecy): the firewall reuses the current key for the IPSec security association (SA) negotiations.
Lifetime
Select units and enter the length of time (default is one hour) that the negotiated key will stay effective.
Lifesize
Select optional units and enter the amount of data that the key can use for encryption.

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