VPN Down

gateway
name: 'Egy-Saudi-VPN'
local-gateway: 41.178.109.139:0 (static)
remote-gateway: 176.44.67.135:0 (static)
dpd-link: off
mode: ike-v1
interface: 'wan1' (5) vrf:0
rx packets: 0 bytes: 0 errors: 0
tx packets: 0 bytes: 0 errors: 1

Site to site vpn tunnel is down

here is tunnel detail s for Fortigate

get vpn ipsec tunnel details

i see that fortigate doesnot do encapsulation on port 4500 (local-gateway: 41.178.109.139:0 (static))

two firewalls connected to ADSL router one is static IP and the other use DDNS

i think there is problem of port fowarding

any help