Can't connect to Facebook or YouTube

[#1]

Made the DNS changes but still not working

[#2]

Started to work again?

[#3]

One of the team is going to get in touch with you about this.

[#4]

Hi Clanger,
Good to chat on the phone. As I said, I can't see anything that could have caused this and it seems to be fixed, but let me know if it comes back, post a full screenshot of the page that appears and we'll take a closer look.
For other people who might be interested, we've set operating system DNS to 212.159.6.9(Plusnet DNS) statically. DNS lookups against the router DNS server return correct results for Google and Facebook... I'm not sure how the redirection to the Flash update page occurred.
Matt

[#5]

I also saw this weird Flash Update thing when trying to access Google or Facebook sites, in the middle of all the DNS woes described in the "Ongoing DNS issues" thread: http://community.plus.net/forum/index.php/topic,124469.0.html
If' I'd been using a Windows machine, I'd have thought it was a virus. As I use a Mac, I thought the DNS servers had been hijacked and were trying to trick me into installing some malware.
Since switching DNS servers to OpenDNS, the Flash update thing has gone away.

[#6]

gborland >  What router do you have?

[#7]

Quote from: Kelly

gborland >  What router do you have?

And please  send us the results of running these commands a few times (on your mac)

host google.com 192.168.1.1
host facebook.com 192.168.1.1

(where 192.168.1.1 is the IP address of your router)
This will show us if the results are good or bad.
Matt

[#8]

My router is an Edimax AR-7265WNA. I have it set to use OpenDNS now, rather than PN's servers, and it's all working fine at the moment.
Anyway:
$ host google.com 192.168.1.1
Using domain server:
Name: 192.168.1.1
Address: 192.168.1.1#53
Aliases:
google.com has address 212.56.71.154
google.com has address 212.56.71.177
google.com has address 212.56.71.166
google.com has address 212.56.71.181
google.com has address 212.56.71.152
google.com has address 212.56.71.165
google.com has address 212.56.71.159
google.com has address 212.56.71.148
google.com has address 212.56.71.174
google.com has address 212.56.71.170
google.com has address 212.56.71.163
google.com has address 212.56.71.185
google.com has address 212.56.71.144
google.com has address 212.56.71.187
google.com has address 212.56.71.176
google.com has address 212.56.71.155
google.com has IPv6 address 2a00:1450:4016:800::1008
google.com mail is handled by 40 alt3.aspmx.l.google.com.
google.com mail is handled by 50 alt4.aspmx.l.google.com.
google.com mail is handled by 30 alt2.aspmx.l.google.com.
google.com mail is handled by 10 aspmx.l.google.com.
google.com mail is handled by 20 alt1.aspmx.l.google.com.

$ host facebook.com 192.168.1.1
Using domain server:
Name: 192.168.1.1
Address: 192.168.1.1#53
Aliases:
facebook.com has address 173.252.110.27
facebook.com has IPv6 address 2a03:2880:2110:df07:face:b00c::1
facebook.com mail is handled by 10 msgin.t.facebook.com.

[#9]

Everything's still working fine so I'm confident it's now fixed.
Thanks everyone for all your help.
Ray

[#10]

Your problem looks very similar to this: http://community.plus.net/forum/index.php/topic,124724.0.html
It could be your router DNS was hijacked.

[#11]

I've seen this DNS exploit reported on Edimax routers as well as TP-Link ones.