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Network Security Protection

Network security protects the functionality of the network ensuring that only authorized users and devices have access to it. The security model of the network consists of a private, trusted group of nodes and a public, publicly viewable, network. There are other features that make network security a vast topic. The public network is broadcasted to all nodes with their public IP address. The public IP address is assigned to each node to connect with other nodes over a local network interface, such as a Ethernet or 802.11 wireless link.

To protect the functionality of the network, nodes run unique software code known as access control lists (ACLs). A Linux distribution also runs special configurations to limit the functionality of the network. For example, IPsec supports a variety of cipher suites, known as modes, and a number of IPsec modes have different security features, and there are also other software that help with network protection, which you can find in this site online.

Network security protects the functionality of the network ensuring that only authorized users and devices have access to it. The security model of the network consists of a private, trusted group of nodes and a public, publicly viewable, network. The public network is broadcasted to all nodes with their public IP address. The public IP address is assigned to each node to connect with other nodes over a local network interface, such as a Ethernet or 802.11 wireless link.

To protect the functionality of the network, nodes run unique software code known as access control lists (ACLs). A Linux distribution also runs special configurations to limit the functionality of the network. For example, IPsec supports a variety of cipher suites, known as modes, and a number of IPsec modes have different security features.

Most operating systems and computing devices use the IPsec software to negotiate their use of IPsec. For more information, see IPsec Operations.

The following table shows the global IPsec configuration for the TCP-IP network that supports Transport Layer Security (TLS):

IPsec Configuration for the TCP/IP Network Teredo Tunnels

Teredo sessions are protected by an encapsulation of the tunnel header with a security group.

TLS/IPsec can use an IPsec security group to define a network segment. The host must be configured with a security group and a key pair.

Protocol, Proposal-Specific, and Mode Nodes

Mode Modes Advantages Disadvantages Configuring both configurations for a machine that supports TLS. Servers encrypt on both sides. Diffie-Hellman groups may be used, so servers can encrypt before sending the packet. Configuring only mode 1. Assumes all machines support TLS, but does not provide protection for Client Key Exchange. Diffie-Hellman groups are not used, so no certificate is needed for TLS. Only able to protect an encrypted TCP tunnel. Requires the remote machine to be configured with a certificate.