Analysis on the security advantages of IPV6 network protocols

We know the excellent performance of IPV6 network protocol, and the most widely known is that it solves the problem of address resource depletion. However, it has other advantages in many ways. The following describes the security of IPV6 network protocols. I believe this is also a matter of concern to everyone. With the development of China's routing industry, the router technology is constantly updated and upgraded. Compared with IPv4, IPV6 has many advantages. First, IPV6 solves the problem of insufficient IP addresses. Second, IPV6 has greatly improved many imperfections in the IPv4 protocol ｡

The most significant difference is the integration of IPSec into the Protocol. From then on, IPSec will no longer exist separately, but as an inherent part of the IPV6 network protocol, it runs through various fields of IPV6, the large-scale use of IPSec will inevitably affect the forwarding performance of network devices, which requires higher hardware performance assurance. This article mainly introduces the security and security mechanisms of IPV6 network protocols ｡

1. Protocol Security

In terms of Protocol Security, IPV6 fully supports Authentication Header (AH) authentication and encapsulation security Load balancer (ESP) Information Security encapsulation extension header. AH authentication supports hmac_md5_96, hmac_sha_000096 Authentication Encryption Algorithm, ESP encapsulation supports three algorithms: DES_CBC, 3DES_CBC, and Null ｡

2. Network Security

(1) end-to-end security guarantee. The packets are encapsulated by IPSec on both hosts, and the intermediate router transparently transmits IPV6 packets with an IPSec extension header to achieve end-to-end security ｡

(2) Keep the internal network confidential. When the internal host communicates with other hosts on the Internet, in order to ensure the security of the internal network, it can be implemented through the configured IPSec gateway. Because IPSec, as the IPV6 extension header, cannot be parsed by the Intermediate router but can only be processed by the destination node, the IPSec gateway can be implemented through the IPSec tunnel, you can also use the Routing header and hop-by-hop option header provided in the IPV6 extension header in combination with the application layer gateway technology. The latter is more flexible in implementation and is conducive to providing improved internal network security, but it is complicated ｡

(3) build a secure VPN through the security tunnel. The VPN here is implemented through the IPSec tunnel of the IPV6 network protocol, A secure VPN is the most common security network construction method. The IPSec Gateway Router is actually the destination and origin of the IPSec tunnel. To meet the forwarding performance requirements, the router needs a dedicated encryption board ｡

(4) Implement Network Security through tunneling nesting. Multiple security protections can be obtained through tunneling nesting. When an IPSec host is configured to access a router with an IPSee gateway through a security tunnel, when the router acts as the end point of the external tunnel encapsulation and stripping, the nested internal security tunnel forms a security isolation for the internal network ｡

3. Other security measures

IPSec guarantees the validity, consistency, and integrity of network data and information content. However, the security threats of data networks are multidimensional, they are distributed in the physical layer, data link layer, network layer, transmission layer, and application layer ｡

For security risks at the physical layer, you can configure redundant devices, redundant lines, safe power supply, ensure the electromagnetic compatibility environment, and enhance security management. For security risks at or above the physical layer, the following measures can be used to prevent attacks at the application layer through security access control protocols such as AAA, TACACS +, and RADIUS; bind the MAC address and IP address, limit the number of MAC addresses on each port, set the traffic threshold for each port broadcast packet, use the port-and VLAN-based ACL, and establish a security user tunnel to prevent layer-2 attacks. network attacks; through routing filtering, encryption and authentication of route information, targeted multicast control, improved route convergence speed, and reduced the impact of route oscillation, the security of L3 networks is enhanced. the complete support for IPSec ensures the validity, consistency and integrity of network data and information content, it also provides many solutions for network security ｡