What ports need to be opened in the firewall for EoIP to work on Mikrotik?

Question

Mikrotik

Hello!
Set up EoIP on Mikrotik. Now it is necessary to pass the traffic associated with this service in the Input chain, and close everything else. What ports to open?

Answer 1

#GRE protocol is used.
/ip firewall filter
add chain=input comment=Tunnels protocol=gre

Answer 2

The EoIP protocol encapsulates Ethernet frames in GRE (IP protocol number 47) packets (just like PPTP) and sends them to the remote side of the EoIP tunnel.

Unlike PPTP, EoIP does not use tcp ports, udp too.

Answer 3

In the list of protocols there is immediately protocol=ipip. For this and other protocols, you can look here: http://mikrotik.vetriks.ru/wiki/Firewall_screen:S...