@MR.S Hello I have recieved answer from Czech Support Team with iperf test speed. They are not as horrible as mine bude did not reach datasheet values. PPTP -client/server unencrypted...

I know. I have always strange problems:-( I am thinking about Teltonika RUTX10 and Mikrotik RB4011. Maybe it will help. Thank you for your help.

@MR.S Hi, same bad results for me. Now I am thinking about returning device a look somewhere else. I am in contact with support. Maybe they will advice something. I have one week left for returning...

@MR.S This looks nice but i do not think it is in encryption algorithm, because PPTP is thé slowest in my situation.

@MR.S I am connecting to the Unify Dream Machine Server for L2TP and Synology NAS for PPTP/OpenVPN. During the test I had only one tunnel active and all the others weredisabled. So for now I thinking...

@Clive_A Yes, it is true, that there is a lot of reasons, but if it is working from computer on the same network (even through the same router), but the VPN connection is not established between...