How to remap lan to wan on sercomm rv6699?

Question

network hardware

There is an idea to use it as a Wi-Fi router, but connect it not through optics, but through an Ethernet cable with the Internet. However, she does not have a van port. Is it possible to reassign one of the lan ports under the van and thus distribute the Internet through it?
Version sercomm rv6699 v 2 and firmware for Rostelecom.

Answer 1

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Answer 2

I understand that it doesn't. Tried with a friend, as a result, it worked through lan, and through vlan it was only possible to get into the admin panel of the main modem