Given recent events, I've gotten a flood of calls from clients who want to start blocking egress traffic to specific countries, or block ingress traffic from specific countries (or both). This seems like something the more “aware” organizations have tried quite a while back, and in many cases have tried it and given it up as not so effective. But just this last week we've been seeing a flood of folks who are thinking about it as something they need to do NOW. In many cases, depending on your hardware and licensing it's as simple as a few tickboxes or lines in an ACL. Even freely available firewalls such as pfSense do a good job of this, using MaxMind (look at pfBlockerNG for pfSense)
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