Method and device for realizing unicast reverse path forwarding (URPF) examination
A reverse path forwarding and forwarding table technology, applied in digital transmission systems, data exchange networks, electrical components, etc., can solve problems such as complex processing, low inspection efficiency, and affecting network performance, so as to prevent malicious attacks and expand application scene effect
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[0041] Such as figure 2 As shown, this embodiment provides a method for implementing URPF check of unicast reverse path forwarding, including the following steps:
[0042] S101: Obtain the source IP address and incoming port of the message;
[0043] In this step, the URPF mode of the packet URPF check is also obtained; for subsequent query according to the URPF mode.
[0044] URPF modes include: Strict URPF, Loose URPF, Allow default routing; where:
[0045] Strict URPF means: use the source IP address for routing lookup, and determine whether the outgoing port of the return path is consistent with the incoming port reached by the data packet.
[0046] Loose URPF means: check whether the routing entry exists in the routing forwarding table, without checking whether the outgoing port of the route is consistent with the source port of the packet.
[0047] Allowing the default route means that the default route is not included when looking up the routing and forwarding table wi...
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