On 04/24/2017 08:20 PM, Marc Haber wrote: > Or it was the other way round. I remember going through bizarre > contortions to set IPv6 ip_forwarding on jessie without > systemd-networkd supporting this "exotic" use case.
Note that it took a _ton_ of iterations for systemd-networkd to converge on a behavior that at least most people would consider sane in the case of IPv6 forwarding. And part of the problem is that the kernel's knob for IPv4 has very different semantics from the same knob for IPv6. In general I believe that the networking part of sysctl kernel interface is not really that well designed. At lest with Jessie's kernel (I haven't checked in a while) settings aren't inherited by a newly created namespace, but instead are the kernel's default settings - just to give one other example I've stumbled upon. Regards, Christian
