arp 2800

ARP attack is a major hidden danger of Internet Café Network security, it is also the scourge of Internet Café Administrator. It is much easier and more important to prevent ARP attacks than to resolve ARP attacks. How to prevent ARP attack, protect Internet bar network security? You may refer to the following methods:

Recently, there have been frequent disconnection of hosts on the network. It was normal at the beginning, but the disconnection may occur after a period of time, sometimes very fast recovery, but sometimes it may take several minutes, this has a huge impact on the work. Initially, I suspected whether it was a physical error. In short, I started to check the most easy-to-start items. No exceptions were found after the check! I suddenly think of the most popular

Information Office of the Times, if the network suddenly broken network you will not appear helpless? The prevalence of ARP virus has made us have to face this sudden threat. So how the ARP virus is how to attack and how to prevent it? What is ARP? ARP, the Address Resolution Protocol (resolution Protocol), is a prot

The combination of ARP spoofing and ICMP redirection can basically achieve the goal of cross-network segment spoofing. This article introduces ARP spoofing Analysis and Countermeasures for different network segments. ARP spoofing Analysis for different network segments Assume that A and C are in the same network segment while host B is in another network segment.

　　Symptoms of ARP virus: Sometimes the Internet cannot be accessed normally, and sometimes there is good, including access to the network neighbors, the copy of files cannot be completed, and an error occurs; ARP packets in the LAN burst, when Arp is used for query, an abnormal Mac address or an incorrect Mac address is found, and a Mac address corresponds to mul

Common ARP Command Options: · ARP-A or ARP-G is used to view all items in the cache. The results of the-A and-G parameters are the same. For many years,-G has been the option used on UNIX platforms to display all items in the ARP cache, windows uses ARP-A (-A can be regarde

Arp:we know that the network layer and the network layer above the use of the IP address, but the actual network on the link to the transmission of data frames, the packet is first accepted by the network card to deal with the upper layer protocol, so ultimately the network must use the hardware address. However, there is no simple mapping between the IP address and the hardware address of the following network (for example, the IP address has 32 bits and the local area network hardware address

Many Computers in the organization suddenly cannot access the Internet. This situation occurs on multiple computers, and many computers are XP SP2 system, and the firewall is enabled. But after careful observation, we found that most computers have enabled the file and printer sharing service, because the ports 137, 138, 139, and 445 opened by this service are exactly It is recommended that you do not open the port frequently used by viruses, or disable the port of the service on the firewall se

communication is a unicast transmission of data frames, Host B and host C communication as described above, so the MAC address table of switch 2 records the MAC address of host A and Host B corresponds to the interface F 0/1.Summary: From the above two pictures can be seen, the switch has the ability to dynamically learn the source MAC address, and one interface of the switch can correspond to multiple MAC addresses, but a MAC address can only one interface.Note: The MAC address of switch dynam

ARP, Address Resolution Protocol. In an Ethernet LAN, when a data frame is exchanged between hosts, it is done through a MAC address. Therefore, when one of the Ethernet hosts sends a packet to the host of another IP address, it needs to know the MAC address of the destination IP address in order to send the IP packet past.Working process:Host A (192.168.0.10) sends an IP packet to Host B (192.168.0.20), and host a needs to encapsulate the IP packet i

　1, ARP attacks through the forgery of IP address and MAC address to achieve ARP spoofing, the network can generate a large number of ARP traffic to make the network blocked, the attacker as long as the continuous issue of fake ARP response package can change the target host ARP