Who should consider WSA (IAG 2007), and when should I choose WSA (IAG 2007) instead of MSA (ISA Server 2006)?
A. Your choice of access mechanism should be dictated by both business and security needs. Microsoft’s goal is to provide a broad solution that can easily adapt to a variety of usage and deployment scenarios. For example, if you are looking for a network-edge gateway that provides fast and secure access with both IP-level filtering, domain-independence and IPsec VPN granular access policy and quarantine, you may choose to deploy ISA Server alone. If, however, you need to improve remote worker productivity by providing access to a range of line-of-business applications from behind existing security infrastructure, or if you need to provide business partners and customers access to applications and resources from unmanaged endpoints and networks, then IAG 2007 plus ISA Server 2006 should be your choice. For more detailed information on differentiating between ISA Server and IAG, read the secure remote access scenario.
