[PLUG] Hey IPv6ers, about this netstat -nt output

Randal L. Schwartz merlyn at stonehenge.com
Sat Jan 29 00:43:51 UTC 2011


>>>>> "Michael" == Michael Rasmussen <michael at jamhome.us> writes:

Michael> recent curiosity point:
Michael>   michael at post:/etc/bind/zones$ netstat -nt
Michael>   Active Internet connections (w/o servers)
Michael>   Proto Recv-Q Send-Q Local Address           Foreign Address         State      
Michael>   tcp6       0      0 64.105.252.42:22        64.105.252.44:58721     ESTABLISHED
Michael>   tcp6       0      0 64.105.252.42:22        64.105.252.44:58279     ESTABLISHED
Michael>   tcp6       0      0 64.105.252.42:22        64.105.252.44:54908     ESTABLISHED
Michael>   tcp6       0      0 64.105.252.42:22        64.105.252.44:55373     ESTABLISHED

Michael> tcp6 and ip4 addresses?  That is kinda unexpected.
Michael> Any handy explanations?

ipv6 supports the notion of an ipv4 address buried inside an ipv6
address for backward compatibility.  It may be that your next-hop
provider also permits such an interpretation, and so everyone is
cooperating.

-- 
Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095
<merlyn at stonehenge.com> <URL:http://www.stonehenge.com/merlyn/>
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