Network connection detection and throttling

Details Network connection detection and throttling Network connection detection and throttling

2003-06-30

2010-10-12

Vu, Kimyen (Department: 2435)

Information security

Monitoring or scanning of software or data including attack...

C726S011000, C726S023000, C713S188000

Reexamination Certificate

active

07814542

ABSTRACT:
In an edge network, message traffic between the edge network and a core network passes through the edge router. A port scanning attack directed to the network as a whole (core network) potentially emanates from within the LAN. The edge router includes a network throttling device which identifies and mitigates harmful transmissions such that they do not propagate to the core network. The network throttling device has a connection daemon to scan transactions and determine deviant or atypical connection attempts. A session database stores a transaction history representing a window of previous connection attempts. A pattern detector examines the history and looks for malicious behavior. Identified deviant patterns cause a throttler enforcer to limit the triggering user by restricting future connection attempts, thus mitigating harmful effects. Usage, therefore, is not prevented, but resilience to deviant practices is provided. Accordingly, virus propagation via port scanning is mitigated to a safe level and false alarms targeting legitimate activity are minimized.

REFERENCES:
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patent: 7092387 (2006-08-01), Chen et al.
patent: 7159149 (2007-01-01), Spiegel et al.
patent: 2002/0103930 (2002-08-01), Kamentsky et al.
patent: 2003/0223466 (2003-12-01), Noronha et al.

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