@Geert_V Router LAN to LAN ACL has two options, either close everything or open everything. so what you are trying will not work. it is strange that TP-Link has not prioritized getting this in place,...

@myke52 why do you think the router is the problem? LAN to LAN communication does not go through the router

@myke52 I assume you mean 20 Mbps, that is what is the specification of this router. so not bad at all..

@AnnusKhan I have an ER8411 myself and I have also had a lot of problems with VPN, my problems have mainly been SSL and OpenVPN, SSL problem has been in combination with IPsec site to site which has...

@AnnusKhan upgrade the router to the latest version to see if that helps. the router has had a high cpu on some of the old versions

@Fergus_Tecnova If you are going to use auto ipsec, all sites must be on the same controller. But I've never gotten it to work, I don't know why, I've never bothered to ask TP-Link about this either,...