Just an update after some investigations today.
On TalkTalk but might apply to other UK ADSL ISP's, the username and password issued is irrelevant!
I noticed in the huwei supplied firewall logs today the default username after a reset is 01warehouse@talktalk.net which was giving me net access when the router was working like one would normally expect, i not having changed the nas_0_38 from ppoa to bridge with tr069 switched off.
I then noticed I had keyed in the username wrong on pfsense, due to the linux device used to access pfsense having the wrong keyboard mapping so the " had swapped places with the @ so my login name was [phonenumber]"talktalk.net not [phonenumber]@talktalk.net. So having corrected it and still no joy, back to the drawing board, messed around the username & password on the huewei router and noticed I could use anything for a username like DoTalkTalkCheckThis@all with a random password and still got net access from the huewei router.
So I then went back to pfsense and reset the wan adaptor and set it to PPPoE with the correct username and password, set the MTU to 1400 to be on the safe side, removed some gateways so it only showed the WAN_PPOE and it all worked.
Now I also know I spoofed the WAN mac id the other day in a bid to see if I could attract some visitors who might be aware of the mac id I was using, I set it first to the talktalk youview box and with hindsight thats when the drop outs first started some hours later. I had also set it to the huewei mac id today and it didnt like that either.
Some further tests tonight and I can confirm it appears talktalk dont bother with usernames and passwords just the mac id, so like the mobile phone IMEI database which exists, the UK adsl net access is monitored/access given by the mac id it would see because everytime I used the router mac id in pfsense, no access, in fact everytime I spoofed the mac id in pfsense, no net access was given.
Its worth pointing out in part of the mac id is given out in the ARP packets so its probably possible to detect spoofed mac id's, which perhaps goes to show, coupled with things like google instant search which is obfusicated java script that can be used to detect typing speed and thus the unique typing patterns of an individual when combined with mac ids and other meta data as the spooks would call it, shows how deep and pervasive the big brother system really is!
Food for thought none the less when considering Edward Snowdens revelations, and the under hand tactics the politicians used to bring in various bits of legislation to "facilitate" this surveillance, whilst giving the biggest tech companies millions/billions to help them facilitate the big brother society.
Might be worth seeing if the nics hardware can be reprogrammed to get new mac ids to beat this system as we are all slowly financially cleansed from existence!