Solution for Google Banning Linodes
Google banned Linodes
I usually use linode to visit Google services via ssh tunnel. but recently I always got captchas even Sorry... page.
Finally I knows that google banned ipv6 traffics from linode which they treated as robots.
Solution
disable ipv6 of linode
for Ubuntu
append lines below to /etc/sysctl.conf
net.ipv6.conf.all.disable_ipv6=1
net.ipv6.conf.default.disable_ipv6=1
net.ipv6.conf.lo.disable_ipv6=1
then restart network /etc/init.d/networking restart or reboot
