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| #!/usr/bin/env bash | |
| _IF=$1 | |
| # note that if you have different masks i'm bad at bash and this is only removing '/24' atm | |
| /bin/ip --brief a | grep "$_IF" | sed 's|/24||g' | awk -F 'P' '{print $NF}' | sed 's| |\n|g' | grep \. | sort | while read line; do | |
| echo -e "-A INPUT -i $_IF -s $line -j LOG --log-prefix '[$line SPOOF DROP] '\n-A INPUT -i $_IF -s $line -j DROP"; | |
| done |
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