sudo iptables -I INPUT -m string --algo bm --hex-string '|303031163014060355040a140d547769747465722c20496e632e311c301a060355040b141354776974|' -j DROP

sudo iptables -I INPUT -m string --algo bm --hex-string '|303031163014060355040a140d547769747465722c20496e632e311c301a060355040b141354776974|' -j LOG