network interface
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... filter that checks the source address of
every message received on a network interface against a list of
acceptable prefixes, dropping any packet that does not match the
...
... the other deterministically follow the same path. While this is
common at edge network interfaces to their ISP, it is in no sense
common between ISPs ...
... Ingress filtering is typically performed to ensure that traffic
arriving on one network interface legitimately comes from a computer
residing on a network reachable through that interface ...