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cisco ios stateful packet inspection

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Denial of Service Tuning for Cisco IOS Software Firewall and Intrusion Prevention System: Cisco IOS Stateful Packet Inspection maintains counters of the number of "Half-open" TCP connections, as well as the total connection rate through the firewall and intrusion prevention software. These half-open connections are TCP connections that have not completed the SYN - SYN/ACK - ACK handshake that is always used by...; Tags: Denial Of Service, Intrusion Prevention System, Cisco IOS, Cisco IOS Software, TCP, Connection, UDP, Cisco Systems Inc., Cisco IOS Stateful Packet Inspection, Tcp/Ip, Intrusion Prevention, Firewalls, Networking, Security; White papers 2006-07-01

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Discussion of Conceptual Difference Between Cisco IOS Classic and Zone-Based Firewalls: Cisco IOS has supported stateful inspection firewall capability since before Cisco IOS Software Version 12.0. Stateful Inspection Firewall features are supported through the Classic Firewall (formerly known as Context-Based Access Control, or CBAC). Cisco IOS Software introduced an additional configuration model for stateful inspection with the Zone-Based Policy Firewall ZFW...; Tags: Cisco IOS, Cisco IOS Software, Cisco Systems Inc., Firewalls, Networking; White papers 2007-10-01
Using Cisco IOS Zone-Based and Classic Firewall in High-Availability Network Environments: Businesses increasingly rely on data networks to carry mission-critical information. This is particularly true for businesses that rely on IP data networks to carry voice-over-IP data for packet telephony. Data networks must offer high-availability capabilities so that business continuity is not interrupted by scheduled maintenance or unexpected downtime due to...; Tags: Data Network, Cisco IOS, Network, Cisco Systems Inc., Firewalls, Networking; White papers 2008-04-01
How Cisco IT Migrated to Stronger Firewall Protection for Large Sites: Like other companies, Cisco Systems needs to connect its intranets to the public Internet to remain competitive and successful. But while connecting to the Internet is critical to Cisco's survival, it also exposes the network to potential attacks from anywhere in the world. Cisco IT and Cisco Information Security InfoSec...; Tags: Information Technology, Cisco Systems Inc., Firewalls, Networking; Case studies 2007-12-21
Configuring the Cisco 851W or 871W: Standard IOS: The Cisco 851W router is a relatively low cost multipurpose device ($292 is the lowest price), which can support virtual wireless LANs separated by firewalls. The $500 version of the 871W is similar to the 851W but offers a few additional features, like external antenna connectors.Our tutorial, "Configuring the Cisco...; Tags: Cisco IOS, LAN, WLAN, Cisco Systems Inc., Wireless, Bill Detwiler; Blog posts 2007-08-03

Cisco IOS IPS Supported Signature List: Cisco Systems releases IOS Intrusion Prevention System IPS signatures in the form of "S-files", which are lists of signatures and their characteristics. Cisco S-files contain signatures for all Cisco IPS platforms: Cisco IPS 42xx sensors, Cisco ASA 55xx appliances, Intrusion Detection System IDS modules for Cisco Catalyst 6500 Series switches,...; Tags: Intrusion Prevention System, Cisco IOS, Cisco Systems Inc., Intrusion Prevention, Security; White papers 2006-04-01
Instant Messaging Version Support in Cisco IOS Firewall Application Inspection and Control: Application inspection and control for instant messaging recognizes and controls the traffic from specific brands and versions of instant messaging software. Cisco introduced classic firewall support for application inspection and control for instant messaging traffic in two phases. The first phase introduced application inspection and control for instant messaging carried...; Tags: Firewall, Cisco IOS, IM, Cisco Systems Inc., Application Inspection, Instant Messaging, Internet, Online Communications; White papers 2007-05-01
Cisco Security Advisory: Cisco IOS Malformed OSPF Packet Causes Reload: A Cisco device running Internetwork Operating System IOS and enabled for the Open Shortest Path First OSPF protocol is vulnerable to a Denial of Service DoS attack from a malformed OSPF packet. The OSPF protocol is not enabled by default. The vulnerability is only present in Cisco IOS release trains...; Tags: Security, Cisco IOS, Vulnerability, Open Shortest Path First, Cisco Systems Inc., Open Shortest Path First Protocol; White papers 2004-08-27
Cisco IOS Classic Firewall Stateful Failover High Availability Solution: Stateful Failover for the Cisco IOS Firewall allows a router to continue processing and forwarding firewall session packets after a planned or unplanned outage occurs. A backup secondary router automatically takes over the tasks of the active primary router if the active router loses connectivity for any reason. This process...; Tags: Cisco IOS, Router, Failover, Cisco Systems Inc., Firewalls, Routers & Switches, Network Technology, Network Security, Networking; White papers 2008-05-01
Cisco Security Advisory: Crafted TCP Packet Can Cause Denial of Service: The Cisco IOS Transmission Control Protocol TCP listener in certain versions of Cisco IOS software is vulnerable to a remotely-exploitable memory leak that may lead to a denial of service condition. This vulnerability only applies to traffic destined to the Cisco IOS device. Traffic transiting the Cisco IOS device will...; Tags: Denial Of Service, Security, Cisco IOS, TCP, Cisco Systems Inc.; White papers 2007-02-02
Cisco IOS IPS Deployment Guide: In today's business environment, network intruders and attackers can come from both outside and inside the network. They can launch Denial-of-Service DoS attacks or Distributed Denial-of-Service DDoS attacks; attack Internet connections; and exploit network and host vulnerabilities. There is often no time to wait for human intervention - the network...; Tags: Cisco IOS, Network, Cisco Systems Inc., Attack, Security; White papers 2006-03-01
Cisco Security Advisory: Crafted IP Option Vulnerability: Cisco routers and switches running Cisco IOS or Cisco IOS XR software may be vulnerable to a remotely exploitable crafted IP option Denial of Service DoS attack. Exploitation of the vulnerability may potentially allow for arbitrary code execution. The vulnerability may be exploited after processing an Internet Control Message Protocol...; Tags: Security, Packet, Vulnerability, IP, Cisco Systems Inc., Network Technology, Networking; White papers 2007-04-22
High Performance Network Security: Security appliances are now a mainstay in the corporate security arsenal. Intrusion Prevention Systems IPS are one of the leading categories of security appliances. Unlike traditional devices like firewalls which examine packet headers alone, an IPS examines the entire packet - called deep packet inspection - and is capable of...; Tags: Intrusion Prevention System, Force10 Networks Inc., Corporate Security, High-performance, Intrusion Prevention, Security; White papers 2006-06-01
Exploiting Stateful Inspection of Network Security in Reconfigurable Hardware: One of the most important areas of a network Intrusion Detection System NIDS, stateful inspection, is described in this paper. The paper presents a novel reconfigurable hardware architecture implementing TCP stateful inspection used in NIDS. This is to achieve a more efficient and faster network intrusion detection system as todays'...; Tags: Network Intrusion Detection System, Network, Intrusion Detection System, Hardware, University Of Oslo, Intrusion Detection, Security, Network Security, Networking; White papers 2008-01-01
Modern Network Security: The Migration to Deep Packet Inspection: The evolution of network and application-layer security threats has significantly altered the requirements for modern network security architecture. Three years ago, a simple Stateful Packet Inspection SPI Firewall was sufficient to stop basic attacks such as port scans and DoS attacks. Now, application-layer buffer overflow attacks, Spam, Spyware, Polymorphic Trojans,...; Tags: eSoft, Network, Migration, Security, Networking, Network Security, Viruses And Worms; White papers 2005-07-14
Stateful Inspection Firewall Session Table Architecture and Timeouts: Stateful Inspection has become a classical technology for network firewall. By analyzing existed timeout processing mechanism of Stateful Inspection, new session table architecture with dynamical timeouts is proposed. The new architecture can improve performances of both timeout processing and session entry updating. Furthermore, dynamical timeouts according to resource utilizations can...; Tags: Architecture, Stateful Inspection, Firewalls, Network Security, Security, Networking; White papers 2005-12-19
Stateful Inspection Firewall Session Table Processing: Stateful Inspection is a key technology to network devices such as routers and firewalls. Existing session table architectures of Stateful Inspection devices store all session information in a single entry, which causes high time cost of session table timeout processing. This paper presents a new architecture which divides a session...; Tags: Session, Stateful Inspection, PATRICIA Algorithm, Firewalls, ASICs, Engineering, Network Security, Networking, Semiconductors, Hardware; White papers 2005-06-23
Configuring Cisco IOS IPS Using Cisco SDM and CLI: In Cisco Router and Security Device Manager SDM 2.2, the Cisco IOS IPS configuration is integrated within the SDM application. The user does not need to launch a separate window to configure Cisco IOS IPS. In Cisco SDM 2.2, a new IPS configuration wizard is added to guide users through...; Tags: Cisco IOS, Cisco Systems Inc.; White papers 2006-03-01
Secure your network with stateful inspection and application layer filtering from an ISA 2004 firewall: Unlike traditional packet filter based stateful hardware firewalls, the ISA firewall is able to perform stateful application layer inspection, meaning it fully inspects the communication streams passed by the ISA firewall from one network to another. It analyzes and makes decisions on all layers of the communication, including...; Tags: Network, Firewalls, Network Security, Security, Networking; Book chapters 2007-01-30
Cisco Security Advisory: IOS Stack Group Bidding Protocol Crafted Packet DoS: The Cisco IOS Stack Group Bidding Protocol SGBP feature in certain versions of Cisco IOS software is vulnerable to a remotely-exploitable denial of service condition. Devices that do not support or have not enabled the SGBP protocol are not affected by this vulnerability. Cisco has made free software available to...; Tags: Security, Cisco IOS, DOS, Vulnerability, Cisco Systems Inc.; White papers 2006-01-18

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