Hello,
I have an RB4011 at home (local config file) and a remote server (server config file) which is also hosting RouterOS.
I’m using the remote server as my VPN server, and so far, I’ve been using it without any problems with an OVPN connection between the local device and the server (You can see the rules and configs regarding OVPN between those two; however, since I’m using IPIPv6 now, they are disabled).
However, recently, I experienced huge speed drops on OVPN due to the ISP restricting it (All other protocols are blocked - I cannot change my ISP), so I’ve decided to use Hurricane Electric IPv6 Tunnel broker (local<---->HE<------>server) (My ISP doesn’t provide IPv6, only NAT-ed dynamic IPv4) to connect to my server through IPv6 using IPIPv6.
It works, and the speed is stable; however, there’s a minor annoying problem. For some applications and use cases, there are timeouts and errors. For example, I cannot play some online games since they no longer connect to the server and gives timeout errors after trying to connect, or when I want to connect to my remote servers’ Winbox (not only this server but also other ones), it connects to them, and I can see the login log on them with other internet connections; however, nothing loads, and all the Winbox windows are blank. Then, they time out, reconnect, and show the same thing. (They’ve worked fine when the local<----->server was connected directly (With any protocol, not only OVPN)).
I also tried other protocols instead of IPIPv6 when behind the HE IPv6 tunnel, and all had the same issue.
Edit: Worth mentioning that I’ve tried it with both local and server’s firewalls drop rules being disabled and still have had the same issue.
Config files:
server.rsc (11.4 KB)
local.rsc (17.8 KB)
Great thanks in advance 
