On Sun, Dec 14, 2014 at 10:41:07AM -0800, david wrote:
> At 10:27 AM 12/14/2014, you wrote:
> Thanks for the prompt response. I'm not sure what you mean by "going
> to". Externally, I'm on an IPV4 system, and the router does have an
> IPV4 address. So, when I try
> ssh <name>@ipv4-address
> and when I have port forwarding set for port 22 to an 192.168
> (internal IPV4 address) of the box,
> I'd expect it to get to the centos box, but it doesn't.
You might be surprised to find out you and he have IPv6 addresses.
the command `ip -6 addr` will show you if there are. An example:
michael@hive ~ % ip -6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp0s10: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 fdb5:1967:1a58::267/128 scope global noprefixroute dynamic
valid_lft 73408sec preferred_lft 73408sec
inet6 2601:7:8c0:70::267/128 scope global noprefixroute dynamic
valid_lft 73408sec preferred_lft 73408sec
inet6 fdb5:1967:1a58:0:e287:c970:f0ab:7abe/64 scope global
noprefixroute dynamic
valid_lft 7195sec preferred_lft 1795sec
inet6 2601:7:8c0:70:937f:82b1:6a3d:44cd/64 scope global noprefixroute
dynamic
valid_lft 7195sec preferred_lft 1795sec
inet6 fe80::1a7d:220c:5129:9b6e/64 scope link
valid_lft forever preferred_lft forever
The /128 ones are of interest, the /64 are actually network addresses. So
michael@hive ~ % ip -6 addr | grep /128
inet6 ::1/128 scope host
inet6 fdb5:1967:1a58::267/128 scope global noprefixroute dynamic
inet6 2601:7:8c0:70::267/128 scope global noprefixroute dynamic
Address ::1 is the IPv6 equivelent of 127.0.0.1
Address fdb5... is the IPv6 equivelent of IP4 RFC 1918 private address space,
the 10.x.y.z, 192.168.x.y etc.
The third address 2601:... is the one of interest. You mentioned Comcast -
your friend may (probably?) has
one of those.
--
Michael Rasmussen, Portland Oregon
Be Appropriate && Follow Your Curiosity
The creative mind plays with the objects it loves.
~ Carl Jung
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