Philip I’ve recreated a wireless connectivity issue with the OpenBSD 6.2 machine powered off & RJ45 disconnected. At this point I’m chalking things up to living in proximity to a airport. In effort to resolve the issue I’ve implemented a spare hawking AP. Regards Patrick
> On Dec 30, 2017, at 7:06 PM, Philip Guenther <guent...@gmail.com> wrote: > > On Sat, 30 Dec 2017, Patrick Dohman wrote: >> I’m looking to determine if the cause of intermittent subnet >> “collisions” that necessitate power cycle of numerous networks hosts is >> the result of OpenBSD security configurations > > You haven't described your setup or what you're actually running on your > OpenBSD box, so I don't know how OpenBSD is even *involved* in what you're > asking about. > > ... >> Essentially If security configurations that disable for example >> broadcast echo & address mask query can lead to unexpected results. For >> example MTU size & TCP window scaling options requiring the results of a >> broadcast ICMP echo. > > Path MTU detection is dependent on ICMP "fragmentation required" > responses, but OpenBSD generates, processes, and passes those by default. > TCP window scaling is not dependent on any sort of ICMP. > > >> Or if unintended result of the stateless UDP traffic never reaching it’s >> destination due to security config can result in ICMP UDP MTU errors. > > Uh, no. > > Frankly, this sounds like grasping at straws; you need to pause and > actually write down *testable* details before trying to come up with > (more) hypotheses. As I wrote before: > >>> If the latter, then you should take it down a level and describe what you >>> tried to do, what you expected to see "on the wire/in the air", and what >>> you _actually_ saw there? > > > Philip Guenther
