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A comment on Port knocking. Parent comment

Re:Port knocking by tinus_hn on Friday May 15, 2020 @07:20AM (#23190872)
With IPv6 every user gets an IPv4 internet worth of addresses for himself which makes fail2ban useless.
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Re:Port knocking by Forbo on Friday May 15, 2020 @10:21AM (#23192500)
Couldn't you just ban the /64 and call it good? It's not like they get a random selection of addresses, they're all going to be the same CIDR. Or am I overlooking something here?
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