Method, client terminal, server and system for preventing network attack using ARP
A network attack and server technology, applied in the network field, can solve the problems of difficulty in implementing the two-way binding scheme, low flexibility, host poisoning, etc., and achieve the effects of reducing configuration workload, improving flexibility, and being easy to implement
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[0057] Generally speaking, the correct gateway address is recorded in the gateway address list obtained from the server. However, if the administrator configures incorrectly, it may also cause the local gateway IP to be out of the preset gateway address list range. In this case, the wrong gateway address is used. If the gateway address list is refreshed, the host will not be able to address the gateway. Therefore, a preferred implementation is shown in Figure 2, which is the second embodiment of a method for preventing network attacks using ARP provided by the present invention. Based on the first embodiment, steps A1-3 include:
[0058] A1-3-1. Obtain the local host's intranet gateway IP;
[0059] A1-3-2. Check whether there is a list item matching the intranet gateway IP in the gateway address list;
[0060] A1-3-3. If yes, use the matched list item to update the ARP cache of the local host;
[0061] A1-3-4. Otherwise, perform step A1-1 again.
[0062] In the second embodiment, ...
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