Network entanglement
Installed Arch Linux on my Goflex Home NAS. I see it on the router from
my ISP. It is connected through an access point to have a sufficient
number of ethernet ports. I can't ping it using the ipv4 address I see
on the router. There are two ipv6 addresses shown. One declares a
lifetime of 3600s and the other says forever. ping and ssh work using
the ipv6 address with a declared lifetime but not the "forever"
Using a system that is connected to the wireless on the ISP router can
ping the Arch system with the ipv4 address.
ping 192.168.1.112
PING 192.168.1.112 (192.168.1.112) 56(84) bytes of data.
From 192.168.1.185 icmp_seq=1 Destination Host Unreachable
From 192.168.1.185 icmp_seq=2 Destination Host Unreachable
From 192.168.1.185 icmp_seq=3 Destination Host Unreachable
From 192.168.1.185 icmp_seq=4 Destination Host Unreachable
From 192.168.1.185 icmp_seq=5 Destination Host Unreachable
From 192.168.1.185 icmp_seq=6 Destination Host Unreachable
^
PING
2600:1702:4860:9dd0:210:75ff:fe28:5e30(2600:1702:4860:9dd0:210:75ff:fe28:5e30)
56 data bytes
64 bytes from 2600:1702:4860:9dd0:210:75ff:fe28:5e30: icmp_seq=1 ttl=64
time=0.301 ms
64 bytes from 2600:1702:4860:9dd0:210:75ff:fe28:5e30: icmp_seq=2 ttl=64
time=0.292 ms
64 bytes from 2600:1702:4860:9dd0:210:75ff:fe28:5e30: icmp_seq=3 ttl=64
time=0.298 ms
64 bytes from 2600:1702:4860:9dd0:210:75ff:fe28:5e30: icmp_seq=4 ttl=64
time=0.288 ms
Knew just enough of ipv4 to almost get around but this is beating me.