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ip route add blackhole 64.79.89.0/19
ip route add blackhole 64.79.85.0/19

I try to add these ranges into route but they give

RTNETLINK answers: Invalid argument

I am not sure if it is about those ranges or a specific problem on my server but other IP ranges work without any issue.

How can I detect the cause of the problem?

Cemil Ezal
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    `64.79.89.0` and `64.79.85.0` are `/24` at max. The `/19` that covers them (and more) would be `64.79.64.0/19`. – Tom Yan Mar 12 '22 at 06:32
  • @TomYan Thank you, these are XLHOST Ip ranges which are known to be malicious. Those ranges are all over the internet, I am not sure why they were shared wrong like this. You can check they were also shared like /19 in this post too https://stackoverflow.com/questions/29736449/how-to-block-access-by-ip-using-htaccess – Cemil Ezal Mar 13 '22 at 17:44

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