On Sat, 17 Nov 2018, James Linder wrote:
Why on earth would would the modem have a firewall? (but their firmware
is ratty so maybe thet are protecting their modem)
Because it's not so much a modem as a router. If anything can be said to
be the modem then it's the NBN box itself, converting the VDSL (if FTTN)
or fibre (if FTTP) to a gigabit WAN connection to the router.
Please understand network terminology before using it.
And yes, the T$ helldesks are utterly clueless, since being outsourced to
Asia; they merely read from a script.
But this is getting grossly OT, and the problem would appear to lie fairly
and squarely with your kit.
-- Dave