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ipset mit asn
get IPs from ASN
whois -h whois.ripe.net -T route AS3320 -i origin | egrep "route: " | awk '{print $NF}'|xargs -I {} echo "ABC {}"
# https://serverfault.com/a/836809 iptables -A INPUT -m set ! --match-set geoblock src -j DROP
apt install ipset whois ipset -N telekom nethash whois -h whois.ripe.net -T route AS3320 -i origin | egrep "route: " | awk '{print $NF}'|xargs -I {} ipset add telekom {} iptables -A INPUT -m set ! --match-set telekom src -j LOG_AND_DROP
#https://www.networkinghowtos.com/howto/change-the-iptables-log-file echo -e ":msg, contains, 'iptables: ' -/var/log/iptables.log\n& ~" |sudo tee /etc/rsyslog.d/10-iptables.conf