+100500 for UDP. It is impossible to use TCP for VoIP (many IP-phones have built-in OpenVPN client) or on slow/unreliable connections. I was very confused when found that Mikrotik does not support OpenVPN over UDP. By the way, there is a mistake in OpenVPN wiki page , you can find proto udp in examp...

Here is the thing... If a client sends a request to TCP80 and you managed to redirect these packets to TCP443, then client will receive packets from TCP443 and these packets will be rejected either by standalone firewall or client's firewall because this connection was not initiated by the client. Y...

I am sorry to double this question but can you access 192.168.88.150:8181 by telnet command right from 192.168.1.1 (not from LAN behind it)?
Contents of /ip firewall from both routers would be helpful.

Could you please provide content of your /ip firewall filter? Maybe 80 and 23 TCP are blocked there. Also try to forward another WAN ports to the same local machine, as you did in add action=dst-nat chain=dstnat comment=\ "Port forwarding to allow remote access to the CMTS from the internet" \ disab...

Do you add "add-default-route" option when you create PPTP client connection? It also has the same name in Winbox/Webfig; you just have to enable the checkbox for it.

I figured out that if I put a switch (RB260GS to be specific) in between ISP and 951G-2HnD PPPoE session works fine, no losses.
What can cause such behaviour?

Some other symptoms.
I tried the same PPPoE connection with the same cables on RouterBOARD 750GL and it works just fine, no losses. I configured PPPoE server on 750GL and connected 951G-2GnD to it through PPPoE - works fine, no losses.
What can cause packet losses on PPPoE link on 951G-2GnD?

I would appreciate any help and ideas on the issue.

I have RB951G-2HnD. My ISP uses PPPoE. I can see big packet loss on that link (see screenshot). No matter what address I try to ping, no matter what physical port I use, no matter what firmware (5.23 and 6.2) I use - losses are there. I tried to change MTU and MRU on PPPoE link from 1480 (default on...