Additional to the above post, I should clarify that "external source" above refers to sending TCP SYN packets from a Vodafone mobile connection to the Vodafone UltraHub router at home. (i.e. Both devices are within the Vodafone network)
I should also clarify that the ports (80, 443, 8080 and 8081) are NOT OPEN when the TCP SYN connections are initiated from outside of Vodafone network. So at least this is good news!