non repudiation in network security

developed by IETF (Internet Engineering Task Force, Internet Engineering Task Group, it can provide communication parties with access control, Non-connection integrity, data source authentication, anti-replay, encryption, and classified data stream encryption services. IPSec is a security mechanism at the network layer. Provides active protection by protecting t

Network security and network security problemsZookeeper 1. prevent intruders from conducting ping detection on the host and prohibit the Linux host from responding to the ICMP packet.Echo 1>/proc/sys/net/ipv4/icmp_echo_ignore_allReplyEcho 0>/proc/sys/net/ipv4/icmp_echo_ignore_all Disable ICMP response on iptables Firew

configure the firewallIn a computer network, you can configure a firewall to control the computer network based on the access scale of network communication, so that the visitor and data can be clearly entered into the network system, it can immediately intercept prohibited or other illegal elements and data, so as to

Through the analysis and research of Private Network classified information systems, this paper comprehensively considers network operation security, information security and confidentiality management. The security protection system is designed and implemented in accordance

. After these operations are completed, each peer knows who it is talking to and that the channel is Secure) the Secure Sockets Layer Protocol uses public key systems and X.509 digital certificates to protect the confidentiality and integrity of information transmission. It cannot guarantee the non-repudiation of information and is mainly applicable to point-to-point information transmission, common Web Ser

deployment and low cost. By combining VPN technology into WLAN, We can greatly make up for the shortcomings of WEP encryption methods and improve data security. Pure VPN adopts national-recognized encryption algorithms without security risks. In addition, pure VPN authentication uses plug-ins. You can use any authentication method, such as smart cards, biological devices, And X.509 certificates. After a pu

This chapter is dedicated to talk about network security, of course, it is relatively general to talk about the characteristics of network security, common network security vulnerabilities, and

is a connection-oriented network security protocol. SET allows non-real-time packet exchange between Parties. SET packets can be transmitted on the bank intranet or other networks, while the Card Payment System on SSL can only be bundled with the Web browser. (2) SSL only occupies part of the E-commerce system (transmission part), while SET is at the application

packets, such as limiting its traffic, inbound and outbound traffic, and providing QoS. 13. Good security performance: vswitches can filter MAC addresses, lock MAC addresses, and build static Mac forwarding tables. 14. Supports IEEE 802.1Q and port-based VLAN. The gvrp (Garp, VLAN Registration Protocol) and gmrp (Garp multicast Registration Protocol) in the IEEE 802.1Q VLAN are also widely supported. 15. It has the SNMP function to better manage a

. Crawl information on the wireless web Whether you are directly connected to the wireless network, as long as the scope of the wireless network exists, there will be information delivery. To see this information, you need a tool. This is ethereal. There is no doubt that this tool is very valuable. Ethereal can scan wireless and Ethernet information, as well as strong filtering capabilities. It can also

also call the half-connection survival time timeout time, syn_recv survival time.Three, SYN attack principleA SYN attack is a DOS attack that leverages TCP protocol flaws to consume CPU and memory resources by sending a large number of half-connection requests.In addition to affecting the host, SYN attacks can also harm routers, firewalls and other network systems, in fact, SYN attack and no matter what the target system,These systems can be implemen

Microsoft Network access protection system provided by the Microsoft consulting service is a protection system for enterprise terminal access to the network. On the one hand, it prohibits non-enterprise terminals from connecting to and using the local network. On the other hand, it performs

and monitors accounts Password importance Password is the core of UNIX and Windows NT Security. If the password is compromised, the basic security mechanism and mode will be severely affected. To select a strong password, you need to set more options in the account policy. You also need to help users select strong passwords. For a strong password, there must be three of the following four aspects: · Upperc

discard the data. In addition, the vswitch performs logical operations on the filtering rules through the hardware "logical and non-Gate" to determine the filtering rules, without affecting the data forwarding rate.Security Tips 2: Port-Based Access Control for 802.1XTo prevent unauthorized users from accessing the LAN and ensure network security, Port-based acc

consent, such as intentionally avoiding system access control mechanism , non-normal use of network equipment and resources, or unauthorized expansion of rights, unauthorized access to information. It mainly has the following forms: counterfeiting, identity attacks, illegal users into the network system for illegal operations, legitimate users to operate in an u

NGN devices. Viruses and hackers generally threaten devices that use general operating systems, such as various servers. Security issues of user services mainly include: User counterfeiting, theft of other users' accounts and permissions to use the business; Illegal listening to the call information or media stream content of other users' calls. In terms of the technical security framework of the NGN acces

handled. In this case, attackers can use these errors to obtain detailed system information, to deny service, to cause the security system to be paralyzed or to destroy the server. Unsecured storage: Network applications that use encryption to protect information and certificates have been proven to be difficult to encode properly, leading to a weakening of the protection function. Denial of service: As