Re: VPN, IPv4 and leak over IPv6

[Thomas Schäfer <tschaefer t-online de>]

Am Samstag, 10. Juni 2017, 12:38:20 schrieb Paul Menzel:

> The next solution could be, that NetworkManager, for example, removes
> the IPv6 by default, if the system only gets an IPv4 address over the
> VPN. That could be deactivated by the user, but that is a “safer”
> default, isn’t it?


That is a bad default behavior.  VPN is not only used for "hiding the own ip". 
There also a lot of scenarios  with split tunneling and other things. If the 
vpn-provider doesn't support IPv6 then he should give configurations hints.
It is also possibe to provide VPNs with IPv4-payload via IPv6-transport. In 
that case the the nm would drop the connection. 

Regards,
Thomas