No, this hub is advertised and included in the package as "all you could ever want" style of modem/router/firewall, but is probably the weakest/most feature/functionality lacking I have ever come across.
Around 18 years ago I was supplied with the most basic and cheapest router/modem/firewall possible by tiscali when we were with them, so I initially dug that out and slotted it between my network and the virgin Hub, being even a most basic piece of kit it did the job (but a bit slow tbh) until I dug out a BT router to replace it.
Apparently expecting normal functionality for typical modem/router/firewall, that's actually advertised as market leading in functionality - is expecting too much!!...
So I would suggest digging out an old router and slotting it between, however it won't be quite as easy as just blocking port 25 (unless you do it on a device/app basis)
One of the big issues is that port 25 being SMTP is often used by legitimate android apps as information/data updates as it will usually be open for email, so if you block that generically you would have to provide an alternative route for email - typically port 587
It would appear someone marked this thread as "solved" when of course it hasn't at all
