Our systems have detected unusual traffic from your computer network.

[damole]

I've just started getting this message when searching using Google. I'm using a 3BB Indy connection in Chiang Mai. No problems with duckduckgo or any other websites.

[Crossy]

This usually pops up when Mr Google sees a lot of searches coming from the same IP address and assumes it's a robot doing the searching.

Are you using a VPN or similar? Try without it.

[sunnyjim5]

Almost always generated by the use of a VPN (especially one of the free ones)

[dddave]

Don't some ISP's also somehow group Google requests, making it appear that they all come from one source?

[Chicog]

Lots of ISPs are starting to use NAT now - I don't think that will help somehow.

IP4 addresses are running out.

http://www.theregister.co.uk/2015/09/24/arin_ipv4_interview_ipv6/

[KhunBENQ]

What seems unusual to me: it shows an IPv6 address?

[Crossy]

What seems unusual to me: it shows an IPv6 address?

Which resolves via Neustar to UK2-ltd suggesting a VPN is in use as our OP (says he) is in Chiang Mai.

[worgeordie]

Yes I have had the message when using a VPN, Google suspects someone is

using your account from another country,nothing to worry about.

regards Worgeordie

[sunnyjim5]

One should also remember many Thai ISP numbers were, at one time, associated with huge volumes of junk/spam mail which led to many being blocked.

I am uncertain about the current situation.

[damole]

I had forgotten I was using my proxy server in Firefox last night and forgot to disable it afterwards. Thanks for the helpful answer.

[bodymassagemyfriend]

Lots of ISPs are starting to use NAT now - I don't think that will help somehow.

IP4 addresses are running out.

http://www.theregister.co.uk/2015/09/24/arin_ipv4_interview_ipv6/

you can't NAT two LAN machines for different customers. They would be stealing each other's ports.

Think about 2 customers willing to accept connetions on port 80