The ISA Firewall has supported RSA SecurID authentication for quite a while. However, after all these years, I've never been able to get my hands on SecurID software and hardware to test the solution and write up how to implement it on your network.
I'm not so much worried about that now, since AuthLite should be available soon for use with ISA firewalls and AuthLite seems to be a far superior solution to SecurID. Regardless, here's a nice article on how to make RSA SecurID work with your ISA 2006 firewall:
Thomas W Shinder, M.D., MCSE
Sr. Consultant / Technical Writer
Prowess Consulting www.prowessconsulting.com
PROWESS CONSULTING documentation | integration | virtualization
Email: [email protected]
MVP — Forefront Edge Security (ISA/TMG/IAG)