Thanks jdwl101. I am looking at wireguard but I am not certain that it is openVPN causing the issue. I am trying to understand why it worked perfectly this morning and reverted to breaking down this evening.
Tonight I ran my VPN on the Mac using the incoming fibre internet direct and a OpenVPN client to attach to the VPN to watch TV and it worked flawlessly so I strongly believe the issue is in my setup at the interface between the two router networks. I know that double NAT can be an issue but not sure if I have it. I can see NAT anti-leakage rules in the firewall on Openwrt so I assume that means NAT is running.
Like so many ISP routers it is impossible to see into the configuration of the machine but I would normally assume it is running NAT so it is possible there is a double NAT.
The problem appears to me to be the interface between the ISP router and the WAN interface on my Openwrt router. Tonight it is so bad I am having to move from one wifi source to the other in order to interrogate the net (ISP direct) and experiment with Luci (Openwrt router where the internet is constantly dropping).
I can (and later tonight I will ) put the router in Bridge mode. Here though, are the warnings that are given when I start to do it:
Le mode bridge est recommandé aux personnes voulant utiliser leur propre routeur derrière leur connexion Free. Si vous activez ce mode, l'adresse IP publique assignée à votre connexion sera attribuée via DHCP à la première machine connectée sur les ports situés à l'arrière de votre Freebox Server.
The Bridge mode is for people with their own router behind the ISP router and the IP address will go to the first device after the ISP box.. So that is fine.
Si vous activez le mode bridge sur votre Freebox Server, cela va altérer le fonctionnement des services suivants :
If you activate Bridge the following services will be altered.
• Le service UPnP A/V sera désactivé. UPnP A/V will be disactivated. OK
• Le service UPnP IGD sera désactivé. * Ditto UPnP IGD* Not sure what this is.
• Le réseau personnel Wi-Fi du Freebox Server sera désactivé. * Ditto personal wifi.* Not sure what this is but if it is the router wifi it will give me some problems but all of them I can cope with. I will however have to reset all my Sonos equipment AGAIN!
• Le service proxy WOL fourni par le Freebox Server sera désactivé. Ditto Proxy Wakeup on LAN. I have never really understood what this is for so it is unlikely to cause me a problem.
• Le partage Windows du Freebox Server ne sera plus accessible via le voisinage réseau (mais toujours accessible via \mafreebox.freebox.fr). * The Windows partition on the Freebox server cannot be access directly but will be available via the server's domain name.*. Windows?! Windows?! Who do they think they are dealing with?
• Les services de découverte (mDNS) des partages Mac OS seront inopérants. OK. I do not use this service.
• Le ou les boitiers Freebox Player ne seront plus accessibles sur le LAN (ceci impacte uniquement le FreeStore et le navigateur Web). It will cause me an issue with the TV server but limited to their store access and their web navigator. Not a problem.
• Le ou les boitiers Freebox Player Pop n’auront plus de TV sans connectivité IPv6 SLAAC. The pop box (a TV server linked to the router server, usually over wifi) will only work over an IPv6 SLAAC connection. * No idea if this will affect me or not. We do not use their TV supply as we already have the same service over the aerial.
• Le service SeedBox sera désactivé. * Ditto for the SeedBox service.. No idea what it is yet and I am sure I do not need it.
Êtes-vous sûr de vouloir passer en mode Bridge ? * Are you really, really sure?* Yes because it can always be reversed.
So here goes. I will post results a bit later.
G