# ip addr 3: enp0s8: mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether 08:00:27:2b:19:68 brd ff:ff:ff:ff:ff:ff inet6 fe80::a00:27ff:fe2b:1968/64 scope link valid_lft forever preferred_lft forever # ping fe80::6924:e5b0:7c18:8897%enp0s8 PING fe80::6924:e5b0:7c18:8897%enp0s8(fe80::6924:e5b0:7c18:8897%enp0s8) 56 data bytes From fe80::a00:27ff:fe2b:1968%enp0s8: icmp_seq=1 Destination unreachable: Address unreachable From fe80::a00:27ff:fe2b:1968%enp0s8: icmp_seq=2 Destination unreachable: Address unreachable From fe80::a00:27ff:fe2b:1968%enp0s8: icmp_seq=3 Destination unreachable: Address unreachable ^C # ip -6 neigh fe80::6924:e5b0:7c18:8897 dev enp0s8 FAILED # ndisc6 fe80::6924:e5b0:7c18:8897 enp0s8 Soliciting fe80::6924:e5b0:7c18:8897 (fe80::6924:e5b0:7c18:8897) on enp0s8... Timed out. Timed out. Timed out. No response. # ip6tables -L -v Chain INPUT (policy DROP 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 8 1192 ACCEPT all lo any anywhere anywhere 3 240 ACCEPT all any any anywhere anywhere ctstate RELATED,ESTABLISHED 2 152 ACCEPT ipv6-icmp any any anywhere anywhere Chain OUTPUT (policy ACCEPT 66 packets, 5360 bytes) pkts bytes target prot opt in out source destination