Changing the rp_filter default in Ubuntu from strict to loose?

[Marc Deslauriers]

On 2019-02-07 11:35 a.m., Sebastien Bacher wrote:
> Hey there,
> 
> The new network-manager in disco does connectivity checking
> per-device/connection type which doesn't play nicely with th rp_filter=1
> default that procps sets in Ubuntu
> 
> The details of the discussions in
> https://gitlab.freedesktop.org/NetworkManager/NetworkManager/issues/116
> but a summary is
> 
> 'it uses libcurl and binds the HTTP request to the device, using the
> SO_BINDTODEVICE socket option. rc_filter=1 rejects all incoming packets,
> if the sender wouldn't also be reached via that device. It thus
> counteracts SO_BINDTODEVICE.'
> 
> Basically those are conflicting so we need to either disable the
> connectivity checker or change the rp_filter default. It looks like
> systemd upstream and fedora already decided to change to default to
> rp_filter=2 (loose)
> https://github.com/systemd/systemd/commit/230450d4
> 
> Can we do the same in Ubuntu?
> 
> 
> Cheers,
> Sebastien Bacher
> 
> 
> 

Loose is reasonable. +1 from me.

Marc.