@TheCat12 - I used the settings from this thread.
I noticed that something doesn’t quite work, because every now and then the connection is broken:
Configuration:
# 2025-04-14 15:29:03 by RouterOS 7.18.2
# software id = 9LCG-S59P
#
# model = RB4011iGS+
/interface bridge
add name=bridge1
/interface pppoe-client
add add-default-route=yes disabled=no interface=ether1 name=pppoe-out1 \
use-peer-dns=yes user={USER}
/interface list
add name=WAN
/ip pool
add name=dhcp_pool0 ranges=192.168.88.2-192.168.88.254
/ip dhcp-server
add address-pool=dhcp_pool0 interface=bridge1 name=dhcp1
/port
set 0 name=serial0
set 1 name=serial1
/interface bridge port
add bridge=bridge1 interface=ether2
/interface list member
add disabled=yes interface=pppoe-out1 list=WAN
add disabled=yes interface=ether1 list=WAN
/interface ovpn-server server
add mac-address={MAC} name=ovpn-server1
/ip address
add address=192.168.88.1/24 interface=bridge1 network=192.168.88.0
add address=91.220.222.78/24 interface=ether1 network=91.220.222.0
/ip cloud
set update-time=no
/ip dhcp-server network
add address=192.168.88.0/24 dns-server=1.1.1.1 gateway=192.168.88.1
/ip dns
set servers=1.1.1.1
/ip firewall filter
add action=accept chain=input comment=\
"defconf: accept established,related,untracked" connection-state=\
established,related,untracked
add action=drop chain=input comment="defconf: drop invalid" connection-state=\
invalid
add action=accept chain=input comment="defconf: accept ICMP" protocol=icmp
add action=accept chain=input comment=\
"defconf: accept to local loopback (for CAPsMAN)" dst-address=127.0.0.1
add action=accept chain=forward comment="defconf: accept in ipsec policy" \
ipsec-policy=in,ipsec
add action=accept chain=forward comment="defconf: accept out ipsec policy" \
ipsec-policy=out,ipsec
add action=fasttrack-connection chain=forward comment="defconf: fasttrack" \
connection-state=established,related hw-offload=yes
add action=accept chain=forward comment=\
"defconf: accept established,related, untracked" connection-state=\
established,related,untracked
add action=drop chain=forward comment="defconf: drop invalid" \
connection-state=invalid
add action=drop chain=forward comment=\
"defconf: drop all from WAN not DSTNATed" connection-nat-state=!dstnat \
connection-state=new in-interface-list=WAN
/ip firewall nat
add action=masquerade chain=srcnat
/ip ipsec profile
set [ find default=yes ] dpd-interval=2m dpd-maximum-failures=5
/ip route
add disabled=no distance=1 dst-address=0.0.0.0/32 gateway=91.220.222.78 \
routing-table=main scope=30 suppress-hw-offload=no target-scope=10
/ip service
set telnet disabled=yes
set ftp disabled=yes
set www disabled=yes
set ssh port=2200
set api disabled=yes
/ip ssh
set strong-crypto=yes
/system clock
set time-zone-name=Europe/Warsaw
/system note
set show-at-login=no
/system ntp client
set enabled=yes
/system ntp client servers
add address=pool.ntp.org
/system routerboard settings
set enter-setup-on=delete-key
/tool bandwidth-server
set enabled=no