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Cisco VPN Client Compatibility
Cisco ASA 5500 Series appliances support numerous software- and hardware-based Cisco VPN clients, including those listed in Table 2.
Table 2.
Compatibility Between Cisco ASA 5500 Series Appliances and VPN Clients
VPN Client
Versions Supported
Software IPSec VPN Clients
•
Cisco VPN Client for Windows, Version 3.6 and later
•
Cisco VPN Client for Linux, Version 3.6 and later
•
Cisco VPN Client for Solaris, Version 3.6 and later
•
Cisco VPN Client for Mac OS X, Version 3.6 and later
Hardware IPSec VPN Clients
(Cisco
Easy VPN Remote)
•
Cisco VPN 3002 Hardware Client, Version 3.0 and higher
•
Cisco IOS Software Easy VPN Remote, Release 12.2(8)YJ
•
Cisco PIX Security Appliance Software versions 6.2 and 6.3
Cisco Site-to-Site VPN Compatibility
In addition to providing interoperability for many third-party VPN products, Cisco ASA 5500 Series appliances interoperate with the Cisco VPN
products listed in Table 3 for site-to-site VPN connectivity:
Table 3.
Site-to-Site VPN Compatibility Between Cisco ASA 5500 Series and VPN Products
VPN Gateway
Versions Supported
Cisco ASA 5500 Series Appliances
Cisco ASA Software Version 7.0(1) and later
Cisco IOS Software Routers
Cisco IOS Software Release 12.1(6)T and later
Cisco PIX Security Appliances
Cisco PIX Security Appliance Software Version 6.0(1) and later
Cisco VPN 3000 Series Concentrators
Cisco VPN 3000 Series Concentrator Software Version 3.0 and later
Cryptographic Standards Supported
Cisco ASA 5500 Series appliances support numerous cryptographic standards and related third-party products and services (Table 4).
Table 4.
Cryptographic Standards and Products Supported by Cisco ASA 5500 Series
Cryptographic Standard
Key Lengths and Hash Sizes Supported
Asymmetric (public key) Encryption Algorithms
•
RSA public/private key pairs, 512 to 4096 bits
•
DSA public/private key pairs, 512 to 1024 bits
Symmetric Encryption Algorithms
•
Advanced Encryption Standard (AES): 128, 192, and 256 bits
•
DES: 56 bits
•
3DES: 168 bits
•
RC4: 40, 56, 64, and 128 bits
Perfect Forward Secrecy (Diffie-Hellman
key negotiation)
•
Group 1: 768 bits
•
Group 2: 1024 bits
•
Group 5: 1536 bits
•
Group 7: 163 bits (Elliptic Curve Diffie-Hellman)
