Internet freezing,but staying connected,can anyone help

Having an issue with my sky LLU connection.

I've been on sky since the 1st November,and for the first month the DLM kept setting my line at 3db and was causing disconnections daily.This has been sorted as sky manually profiled the line.

But another issue has been happening since around the beginning of January, the internet just goes off,but it stays connected at the router,,in-fact it was connected for 20 days and during this time it had gone of at various times every other day for about 5-15 mins.

I just get the internet page cannot be displayed,on all devices,tablet,laptopXbox live will sign out,neflix will stop,it will just like "freeze".I check the stats and the line is all up,the smiley face on the sky router is on.

I rang sky and they said its the router,so I now have a brand new router since last Thursday,and its doing it again.just freezing out,,This is on wired and wireless connection.

Sky say also its been connected for xxx amount of days.

I've tried other DNS servers,changing the channel on the wifi,though it does it on the xbox,plugging into the test socket,resetting etc.

I have to just wait for it to come back on.

Sky say there have been no outages in my area.

What could this problem be?

Can anyone please help

Sky are kicking you off their authentication server.

Does the router have a system log to see what's happening?

No stats now,as I rang sky last night and they got me to reset the router again.

How would I get that sorted with authentication,and why are they doing it on my connection?

Now you said that,i'm sure I seen something in the stats around the time it happened once,i'm guessing here,but something like ppp chap,or something,I will copy and paste the stats when it happens next,I thought looking at the stats it had disconnected,but it hadn't.

Very annoying,as sky just say my line is solid with no errors and no disconnections

In reply to a post by craggs:

something like ppp chap

Yes, look for those in log alongside 'WAN down/up' maybe.

Do you have homeplugs, i have a bug like this in mine

Sods law is not do it today, but as soon as it does I will post the stats,,if it is authentication how is it fixed, as I think you're spot on with the problem

No home plugs., combination of wired & wireless

Maybe related, I have noticed recently that when I power cycle my router (old O2 Thomson router) it takes a long time at the authentication stage. The router syncs to the exchange fairly quickly (ADSL lamp stops flashing) but the Internet lamp stays off for maybe a couple of minutes before coming on. Perhaps there is a general issue with the Sky authentication servers? We had a couple of power cuts here yesterday and I noticed this when power was restored.

But once connected it remains connected and working for weeks at a time.

In reply to a post by iand:

Do you have homeplugs, i have a bug like this in mine

Are they Zyxel homeplugs by any chance?

devolo 500's. Never had this with the 200's, which I used for 3-4 years.

frustrating from time to time. The links between the devices are showing green, but they do not carry any IP data. You can not ping through that device to anywhere. The other devolo's carry traffic. It is like the device goes to sleep for 2-5mins and the bursts into life.