[strongSwan] RouterOS 6.29 and Strongswan IPSec site to site

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Hi,

I am looking for help to create a IPSec site to site tunnel to a
remote site using RouterOS. The remote site is a VPS with public and
static IP which uses a debian 7 as the base OS. Strongswan 5.3 is
installed at the remote site and andriod users can log in.

The local Router OS is also on a static IP which serves the lan users
via address 192.168.128.0/24

I have tried with different ways but not able to succeed in having a tunnel.

Can one help to point me a how to?

CK