MacOS pptp client + IPv6

Simon Perreault simon.perreault at
Mon Feb 7 15:31:12 CET 2011

On 2011-02-07 09:23, Jared Mauch wrote:
> Anyone gotten the MacOS PPTP/VPN client to obtain an IPv6 address?  I'm using a Cisco router on the other end, and am looking for anything obvious i'm missing.  It appears to be sending the traffic out the virtual-access interface just fine, but I'm not seeing an IPv6 address on the ppp0 interface.

Maybe this will be helpful:

Especially this part:

> However, the IPv6 global addresses are now shown anywhere, either in the Network Settings Panel, nor with ifconfig ppp0. The IPv6 PPP specification(RFC5072) says that the global address is obtained by router advertisements on the PPP link or by DHCPv6.
> Inspection of MacOSX shows that router advertisements were not enabled (surprisingly, becauseI'm using IPv6 RA at the office without having to do any change in the kernel config) in the kernel, so I enable them.
> # sudo sysctl -w net.inet6.ip6.accept_rtadv=1
> net.inet6.ip6.accept_rtadv: 0 -> 1

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