issue access to woocommerce doc web site

That URL works fine for me.

ok that is strange. my ISP say no block.
bypass firewall with direct laptop connect also does not work.
use mobile 3G network of another service provide n works.
woocommerce will have no reason to block my ipAddress.

so what can be wrong here?
any advice to further my troubleshooting?

Use the computer that works and contact https://woocommerce.com/my-account/?redirect_to=%2Fmy-account%2Ftickets%2F%3F_ga%3D1.3685752.93568553.1473100463