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Are egress and ingress filters installed on all border routers to prevent impersonation with a spoofed IP address?

April 26, 2017border egress filters impersonation ingress installed ip address routers spoofed

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Are egress and ingress filters installed on all border routers to prevent impersonation with a spoofed IP address?

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Yes. We have a standard inbound filter on all ISP uplinks. We also have filters applied at each customer’s routing interface to assure that they are only using the IP address block that was assigned to them.