I have had previous issues with gaining internet access despite being successfully connected to the router. Turning everything off and rebooting the router has helped before but not this time. It's been OK for a while but it's crept back again and I'm almost tearing my hair out. (I'm not as it happens as I realise I mustn't play with a dwindling resource).
My main PC is working OK. However, my laptop and my PS3 and now my partner's Samsung Galaxy 3 phone no longer have internet access. The laptop fails with both wireless and LAN connections to the router. The PS3 is wireless. The laptop and PS3 both report that there is a problem accessing the DNS server. Clearly the issue does not centre on the individual devices as it's affecting all at the same time.
ISP is Plusnet fibre, router is an ASUS RT-N66U