Network > Network Profiles > IPSec Crypto
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Network > Network Profiles > IPSec Crypto
Select NetworkNetwork ProfilesIPSec 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:
Use ESP protocol
because it provides connection confidentiality (encryption) as well
as authentication. |
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,
and 3des. You can also select null (no
encryption). Use a form of AES encryption.
(3DES is a weak, vulnerable algorithm.) |
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). Use sha256 or stronger
authentication because md5 and sha1 are
not secure. Use sha256 for short-lived sessions
and sha384 or higher for traffic that requires
the most secure authentication, such as financial transactions. |
DH Group | Select the Diffie-Hellman (DH) group for
Internet Key Exchange (IKE): group1, group2, group5, group14, group15, group16, group19, group20,
or group21. 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. |