@liveprints 

It looks like your carrier is having you inside another network (I think).

Visit other websites that show you what your IP is and if it still comes out as 109.41.x.x then contact Vodafone. I would probably see if port forwarding is done is there a passthrough on their end?

So for example say you port forward 8080, then a remote computer would use 109.41.x.x:8080 and that route to 100.79.x.x.

@liveprints 

I have the same problem and I am also on Vodafone (Romania in my case). I presented my problem here. 300Mbps Wireless 4G LTE Router Showing different Public IP Address

If you find a solution, please let me know. I will do the same. 
 

BTW, it might not resolve your problem but can also use ZeroTier One. It is a different approach altogether. 

@Tony, I have the same problem. I presented it here:  300Mbps Wireless 4G LTE Router Showing different Public IP Address

I tried many different IP Lookup sites. Same thing. It gives me the same Public IP address that is different than the one shown inside of the router settings. But in my case, the one in my router settings is a Private IP Address. I looked it up. Do you think it is the same situation as Rebecca's and actually Vodafone is giving us Private addresses in that range? It is the first time I hear about this: <<It looks like your carrier is having you inside another network>>

@liveprints, Can you check here whatismyipaddress.com/ip-lookup and let us know if your address 100.79.xx.xx is private or public? My WAN IP Address search got me here: whatismyipaddress.com/private-ip

PS: I had to edit the links in the previous post as the forum did not let me post them. (?!) They should work with copy/paste, of course. 

@liveprints This is what I found while searching for a solution. It seems it happens a lot as this is a thing: https://en.wikipedia.org/wiki/Carrier-grade_NAT