Navigate to https://dashboard.lectron.com/home

Click this dropdown and select your Public IP.

Click on source and put "0.0.0.0/0" as default.

Click this dropdown and select a protocol. (TCP)

Select protocol
tcp
udp
icmp
hopopt
igmp
ggp
ipv4
st
cbt
egp
igp
bbn-rcc-mon
nvp-ii
pup
argus
emcon
xnet
chaos
mux
dcn-meas
hmp
prm
xns-idp
trunk-1
trunk-2
leaf-1
leaf-2
rdp
irtp
iso-tp4
netblt
mfe-nsp
merit-inp
dccp
3pc
idpr
xtp
ddp
idpr-cmtp
tp++
il
ipv6
sdrp
ipv6-route
ipv6-frag
idrp
rsvp
gre
dsr
bna
esp
ah
i-nlsp
swipe
narp
mobile
tlsp
skip
ipv6-icmp
ipv6-nonxt
ipv6-opts
cftp
sat-expak
kryptolan
rvd
ippc
sat-mon
visa
ipcv
cpnx
cphb
wsn
pvp
br-sat-mon
sun-nd
wb-mon
wb-expak
iso-ip
vmtp
secure-vmtp
vines
ttp
iptm
nsfnet-igp
dgp
tcf
eigrp
ospfigp
sprite-rpc
larp
mtp
ax.25
ipip
micp
scc-sp
etherip
encap
gmtp
ifmp
pnni
pim
aris
scps
qnx
a/n
ipcomp
snp
compaq-peer
ipx-in-ip
vrrp
pgm
l2tp
ddx
iatp
stp
srp
uti
smp
sm
ptp
isis over ipv4
fire
crtp
crudp
sscopmce
iplt
sps
pipe
sctp
fc
rsvp-e2e-ignore
mobility header
udplite
mpls-in-ip
manet
hip
shim6
wesp
rohc

Click this dropdown and select Whitelist.

Click this dropdown and select a protocol. (UDP)

Click this dropdown and select your public IP.

Tip! Final one, 
lets close all the ports we dont need

How to Create Firewall Rules on Lectron Dashboard.