Re: Disabling SIP ALG on Plusnet Hub One
@dunedinbear Welcome to the forum.
I don't think it's possible but if it's important to you then get the Business version of a BT Smarthub 6 from the likes of EBay, where they go for little money. Setting instructions are here https://community.plus.net/t5/My-Router/Using-the-BT-Smarthub-6-on-a-Plusnet-Account/m-p/1587673#M85...
The relevant page from mine: