True but I don't really want to keep a log (and rotate/purge them), just see if packets are going in and out. I might add another screen for setting up VPN to my server so that non-statically IP'd users can connect via the bridge. This is how HILANT works - there is a VPN to my UK network and the bridge uses the static internal addresses to communicate. The VPN screen basically does this loop forever: Can I ping the other side's bridge machine? - Yes - ok, it's coool - No - restart VPN It's run without intervention for a year now :) sampsa <sampsa at mac.com> mobile +358 40 7208932 On 18 Oct 2013, at 00:53, Sampsa Laine <sampsa at mac.com> wrote: Ah. There is. That is what the SIGUSR1 is for... I should improve on it, so that you can do it on a process you don't have the output from, though... Yeah, thats why for now I suggest we launch the bridge in screen on the HECberry - attach to screen, send SIGUSR1 from other screen, see the results on main screen. Screen is pretty light weight, even for a RasPi...