Port Forwarding not working

I can’t get port forwarding to work with AT&T 5268 and new 4-tuner. I had this working with original 4-tuner. I’ve always used private IP address, and have configured rules to pass through to private ports, but still getting red bangs in front of public ports. Question: Does the 5268 require specific public ports? If so, which?

P.S. Not sure if this started up with today’s firmware update, or if problem previously existed. Have had the new 4-tuner a few months, but haven’t been outside of house to try remote access.