2011:07:15-23:02:10 asg hurricane[6419]: -ERROR: IP is not ICMP pingable. Please make sure ICMP is not blocked. If you are blocking ICMP, please allow 66.220.2.74 through your firewall.
I remembered that I had turned off the firewall rule so I went and turned it back on.... sure enough my tunnel came up.
Mr. Klassen mentioned this in a closed thread so I thought I should open a new one. This is the thread: http://www.astaro.org/astaro-beta-versions/asg-v8-200-beta/asg-v8-200-beta-closed-threads/37837-8-170-question-answered-hurricane-electric-tunnel-broker.html
Paul
PS I created the ping rule myself back when the Hurricane Electric tunnel was first being tested. Is there an automatic rule it is conflicting with?