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A router or SYSTEM capable of routing TRAFFIC by ENCRYPTING it and encapsulating it for TRANSMISSION across an untrusted network, for eventual de-encapsulation and decryption.

A router or system capable of routing traffic by encrypting it and encapsulating it for transmission across an untrusted network, for eventual de-encapsulation and decryption.

A portable device used for AUTHENTICATING a USER. Authentication tokens operate by challenge/response, time-based code sequences, or other TECHNIQUES. This MAY include paper-based lists of one-time PASSWORDS.

A portable device used for authenticating a user. Authentication tokens operate by challenge/response, time-based code sequences, or other techniques. This may include paper-based lists of one-time passwords.

A NETWORK gateway JOINS two networks TOGETHER through a combination of hardware and software.A network firewall guards a computer network against unauthorized INCOMING or outgoing access. Network firewalls may be hardware devices or software programs.

A network gateway joins two networks together through a combination of hardware and software.A network firewall guards a computer network against unauthorized incoming or outgoing access. Network firewalls may be hardware devices or software programs.

When a user performs an ACTION that they should not have, ACCORDING to ORGANIZATIONAL POLICY or LAW.

When a user performs an action that they should not have, according to organizational policy or law.

A standalone program that, when run, COPIES itself from ONE HOST to ANOTHER, and then runs itself on each newly infected host. The widely reported 'Internet Virus' of 1988 was not a virus at all, but ACTUALLY a worm.

A standalone program that, when run, copies itself from one host to another, and then runs itself on each newly infected host. The widely reported 'Internet Virus' of 1988 was not a virus at all, but actually a worm.

An AUTHENTICATION technique whereby a server sends an UNPREDICTABLE challenge to the USER, who computes a RESPONSE USING some form of authentication token.

An authentication technique whereby a server sends an unpredictable challenge to the user, who computes a response using some form of authentication token.

Rules for PACKET filters (typically ROUTERS) that define which PACKETS to pass and which to BLOCK.

Rules for packet filters (typically routers) that define which packets to pass and which to block.

A router that CONNECTS your NETWORK to the external Internet. Typically, this is your first line of defense against attackers from the outside Internet. By enabling access CONTROL lists on this router, you'll be able to provide a level of protection for all of the hosts `behind' that router, effectively making that network a DMZ instead of an unprotected external LAN.

A router that connects your network to the external Internet. Typically, this is your first line of defense against attackers from the outside Internet. By enabling access control lists on this router, you'll be able to provide a level of protection for all of the hosts `behind' that router, effectively making that network a DMZ instead of an unprotected external LAN.

A firewall in which traffic is EXAMINED at the NETWORK protocol PACKET layer.

A firewall in which traffic is examined at the network protocol packet layer.

An ATTACK ORIGINATING from INSIDE a PROTECTED NETWORK.

An attack originating from inside a protected network.

The TECHNIQUE of securing an individual SYSTEM from attack. HOST based security is operating system and version DEPENDENT.

The technique of securing an individual system from attack. Host based security is operating system and version dependent.

DEPEND on firewall CONFIGURATION, all most AUTHORIZE port NB 80, so we can communicate over Http protocol.

Depend on firewall configuration, all most authorize port nb 80, so we can communicate over Http protocol.

The PROCESS of STORING information about events that occurred on the FIREWALL or NETWORK.

The process of storing information about events that occurred on the firewall or network.

A SOFTWARE agent that acts on behalf of a user. Typical proxies accept a connection from a user, make a decision as to whether or not the user or CLIENT IP address is permitted to use the proxy, perhaps does additional AUTHENTICATION, and then completes a connection on behalf of the user to a remote destination.

A software agent that acts on behalf of a user. Typical proxies accept a connection from a user, make a decision as to whether or not the user or client IP address is permitted to use the proxy, perhaps does additional authentication, and then completes a connection on behalf of the user to a remote destination.

A router configured to PERMIT or DENY TRAFFIC based on a set of permission RULES installed by the administrator.

A router configured to permit or deny traffic based on a set of permission rules installed by the administrator.

The PROCESS of determining what types of activities are permitted. USUALLY, authorization is in the context of authentication: once you have authenticated a USER, they may be AUTHORIZED different types of access or ACTIVITY.

The process of determining what types of activities are permitted. Usually, authorization is in the context of authentication: once you have authenticated a user, they may be authorized different types of access or activity.

A firewall system in which service is provided by processes that maintain COMPLETE TCP connection STATE and sequencing. APPLICATION layer firewalls OFTEN re-address traffic so that outgoing traffic appears to have originated from the firewall, RATHER than the internal host.

A firewall system in which service is provided by processes that maintain complete TCP connection state and sequencing. Application layer firewalls often re-address traffic so that outgoing traffic appears to have originated from the firewall, rather than the internal host.

To enable firewall in Window...Start - CONTROL PANEL - Security CENTER -TURN On the Firewall BUTTON and enable it.

To enable firewall in Window...Start - Control panel - Security center -Turn On the Firewall Button and enable it.

In WINDOWS 2003 SERVER, built in firewall is PRESENT.

In windows 2003 server, built in firewall is present.

A firewall is a PART of a COMPUTER system or network that is DESIGNED to block unauthorized access while permitting authorized communications. It is a DEVICE or set of devices which is configured to permit or deny computer applications based upon a set of rules and other criteria.

Firewalls can be implemented in EITHER hardware or software, or a combination of both.

A firewall is a part of a computer system or network that is designed to block unauthorized access while permitting authorized communications. It is a device or set of devices which is configured to permit or deny computer applications based upon a set of rules and other criteria.

Firewalls can be implemented in either hardware or software, or a combination of both.