Failed ssh login attempts

On Debian/Ubuntu

awk '/sshd.*Failed/ { for (f=1; f<NF; f++) if ( $f ~ "from" ) print $2, $1, $(f-1), $(f+1) }' /var/log/auth.log*

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View expiration date of DNSSEC signature

  dig SOA yourdomain.com @nameserver +dnssec  

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