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sit0 Link encap:IPv6-in-IPv4
NOARP MTU:1480 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
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alias net-pf-10 ipv6
alias net-pf-10 off
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http://andrew.sayya.org/blog/?p=520
http://menjoy.javaeye.com/blog/258398
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1. Ubuntu
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