Hey @Kris_K,
Thanks for writing in, and my apologies for the delay in following up. After digging into your specific router, the Salt Fiber Box, it looks like you may have an IPv6 address.
If possible, can you check with your ISP to see if you’re able to get a static IPv4 IP? Here is another thread based on the Salt box : Port forwarding issue with Salt. Box (Switzerland) - #15 by Georgethesixth
I’ll be monitoring this thread for your reply 