Bridge mode (route WAN access directly to LAN port)

I noticed one of my network device cannot communicate with NTP servers. I have Mikrotik router/4G modem and I have another router with its’ own firewall connected to Mikrotik LAN1 port. The device is behind the other router.

I would like to have the other router to bypass the Mikrotik firewall/NAT altogether and allow direct access to internet for it. Usually when I’ve done this with other modems there has been a simple bridge mode setting that allows to do this, but on Mikrotik bridge mode means a different thing. I tried to search wiki and manual, but I could not figure out. What would be the easiest way to allow this functionality for LAN1 port in WEB UI?

I don’t have any such device myself, but maybe you’re looking for this?

https://help.mikrotik.com/docs/display/ROS/LTE#LTE-PassthroughExample

Does the MT WIFI MODEM device have an NTP server option?
Just set the NTP server as a client to the external sites you wish to tap into and then send other devices to the MIkrotik modem NTP server for info?

@sob is right…
If you enable passthrough the LTE device will only be used for IP configuration, modem settings etc… So you will have to deal only with the Firewall on your " other " Router…

However, in case you choose to apply the passthrough feature, then you must create VLANs on both your devices ( to the interfaces connecting these two ), so that you can have management access to the LTE device and at the same time have the passthrough working…

I tried this, but could not get it to work. I probably had some setting wrong.

Thanks, this is what I am looking for. If I use this can I also use the Mikrotik wi-fi at the same time with Mikrotik firewall and DHCP enabled for wi-fi? If not, then I’ll need to figure out the NTP settings.

Yes you can…
Notice though, that the LTE device will not have Internet itself from the time that passthrough will be enabled.
You will have to configure a default route and a DNS server pointing at your router.