Port forwarding with Fritzbox as modem

Question

Hello all, i am trying to forward a port (80) from internet to my IP cam. 
 Here is my network scenario 
 
 I did forward port 80 in Fritzbox, that seems to work. I forward 4444 to Sophos for testing and it worked. I could open Sophos Webgui on public ip. 
 Here is my Firewall Rule: 
 
 actual tried with network Any instead of WAN but didn't work either. 
 Here my dnat rule

So what I have tried. 
 I tired to call my Ip address with port 80 and firewall log says:

19:23:49 
 Default DROP 
 TCP

91.67.X.X 
 : 
 53292

&rarr;

192.168.150.2 
 : 
 80

[SYN] 
 len=60 
 ttl=62 
 tos=0x00 
 srcmac=cc:ce:1e:b8:0b:6b 
 dstmac=00:1f:29:03:5a:6c

Then I connected a device to Fritzbox and tried to open 192.168.155.2:80 and firewall says:

192.168.150.102 
 : 
 51124

&rarr;

192.168.150.2 
 : 
 80

[SYN] 
 len=60 
 ttl=64 
 tos=0x00 
 srcmac=fc:65:de:ad:aa:5e 
 dstmac=00:1f:29:03:5a:6c

I tried so many settings like setting up snat or network masqerade. I did try even firewall rule any network using any port to any networks but that didn't work as well. 
 It drives me nuts. Let me know if I missed information to share. 
 I do appreciate every help 
 thank you in advance 
 Simon

LuCar Toni · Answer

The issue here is, the Fritzbox is performing Fullnat not DNAT. 
 Also the DNAT Rule is wrong. 
 DNAT needs to be setup like this: 
 Top: How does the traffic look incoming? 
 Source: Internet v4 
 Service HTTP 
 Destination WAN Interface of UTM. 
 Bottom: How should the traffic look after NAT? 
 DNAT: Destination Change to Webserver.