Design and Implementation of Cross-Domain Cooperative Firewall

Security and privacy are two major concerns in supporting roaming users across administrative domains. In current practices, a roaming user often uses encrypted tunnels, e.g., Virtual Private Networks (VPNs), to protect the secrecy and privacy of her communications. However, due to its encrypted nature, the traffic flowing through these tunnels cannot be examined and regulated by the foreign network's firewall, which may lead the foreign network widely open to various attacks from the Internet. This threat can be alleviated if the users reveal their traffic to the foreign network or the foreign network reveals its firewall rules to the tunnel endpoints. However, neither approach is desirable in practice due to privacy concerns. In this paper, we propose a Cross-Domain Cooperative Firewall (CDCF) that allows two collaborative networks to enforce each other's firewall rules in an oblivious manner. In CDCF, when a roaming user establishes an encrypted tunnel between his home net...

• Type: Conference
• Year: 2007
• Where: ICNP
• Authors: Jerry Cheng, Hao Yang, Starsky H. Y. Wong, Petros Zerfos, Songwu Lu
• Keywords: Foreign Network, Foreign Network Firewall, ICNP 2007, Network Protocols, Roaming User