Check out the new USENIX Web site.
USENIX, The Advanced Computing Systems Association

15th USENIX Security Symposium Abstract

Pp. 137–151 of the Proceedings

SANE: A Protection Architecture for Enterprise Networks

Martin Casado and Tal Garfinkel, Stanford University; Aditya Akella, Carnegie Mellon University; Michael J. Freedman, Dan Boneh, and Nick McKeown, Stanford University; Scott Shenker, University of California, Berkeley


Connectivity in today's enterprise networks is regulated by a combination of complex routing and bridging policies, along with various interdiction mechanisms such as ACLs, packet filters, and other middleboxes that attempt to retrofit access control onto an otherwise permissive network architecture. This leads to enterprise networks that are inflexible, fragile, and difficult to manage.

To address these limitations, we offer SANE, a protection architecture for enterprise networks. SANE defines a single protection layer that governs all connectivity within the enterprise. All routing and access control decisions are made by a logically-centralized server that grants access to services by handing out capabilities (encrypted source routes) according to declarative access control policies (e.g., "Alice can access http server foo"). Capabilities are enforced at each switch, which are simple and only minimally trusted. SANE offers strong attack resistance and containment in the face of compromise, yet is practical for everyday use. Our prototype implementation shows that SANE could be deployed in current networks with only a few modifications, and it can easily scale to networks of tens of thousands of nodes.

  • View the full text of this paper in HTML and PDF. Listen to the presentation and Q & A in MP3 format.
    Click here if you have forgotten your password Until August 2007, you will need your USENIX membership identification in order to access the full papers. The Proceedings are published as a collective work, © 2006 by the USENIX Association. All Rights Reserved. Rights to individual papers remain with the author or the author's employer. Permission is granted for the noncommercial reproduction of the complete work for educational or research purposes. USENIX acknowledges all trademarks within this paper.
To become a USENIX member, please see our Membership Information.

Last changed: 20 Sept. 2006 ch