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ultimate, simple and minimalistic UNIX ARP-MITM protection
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| #!/bin/bash | |
| # ultimate, simple and minimalistic UNIX ARP-MITM protection by making gateway hardware address static just after DHCP and automatically after interface start | |
| # place in /etc/network/if-up.d/ARProtect | |
| if [[ "$IFACE" != "lo" && "$MODE" = "start" && "$ADDRFAM" = *[N,n]et* ]] | |
| then | |
| IP_GATEWAY=$(ip route | grep default | grep $IFACE | cut -d ' ' -f 3) | |
| MAC=$(ip neigh show $IP_GATEWAY | cut -d ' ' -f 5) | |
| arp -s $IP_GATEWAY $MAC | |
| fi |
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