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Tag: security

IPv6 ACL Explicit vs Implicit Deny Any Any

Posted on August 13, 2012January 8, 2019 by Tom Kacprzynski

Reading the IPv6 Configuration Guide (Implementing Traffic Filters and Firewalls for IPv6 Security), I came across a little known fact that seems to be very important when configuring  IPv6 access-lists on IOS. Usually when I configured an IPv4 ACL, I explicitly defined a deny ip any any at the end, which seems like the best…

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