Note: With Cisco VPN client version 4.6.x and later, the maximum pre-shared key length for the VPN Client is 128 characters. The previous limit was 32 characters. The increased key size works only with central-site devices that support 128 characters, for example, an ASA device.
If the central-site device does not support 128 characters, for example, a VPN 3000 Concentrator, you receive the same log messages as if the pre-shared key were wrong:
386 15:39:39.010 03/30/05 Sev=Warning/3 IKE/0xE3000056 The received HASH payload cannot be verified
387 15:39:39.010 03/30/05 Sev=Warning/2 IKE/0xE300007D Hash verification failed... may be configured with invalid group password.