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As far as I know 'newer' versions of routing protocols support authentication between routers.
What about encryption and integrity checks? Some implementations like this one from Cisco use MD5, which I dont feel secure using. How do you protect against MITM tampering with your routing tables?
Is there any easier way to protect from using IPSEC between your routers? Whats so rocket science about adding some 'proper' security in routing protocols anyway?

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