What IPv4 endpoint should I mention?
I am trying to create regular tunnel on https://tunnelbroker.net. Public IP address of our institute is 14.139.196.2. On using this address as IPv4 endpoint address the message
"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."
is being displayed. On using
cat /proc/sys/net/ipv4/icmp_echo_ignore_all
I understood that ICMP ping is enabled on my system. What IPv4 Endpoint should I mention? Or How do I get around with the error?
@sridhar: Never, ever put actual IP addresses on public forums. They are liable to be picked up by bots etc.a nd you could get Denial of Service attacks.
Now to your post: The error message is what it is. Your external gateway 14.139.196.x does not allow ICMP echo (ping to get in). Solution, ask them to open up ICMP. I am not sure you would have the clearance/privileges to do so.
Alternative ways to get IPv6:
- Ask your upstream ISP to give you an IPv6 block - in India, ERNET is also a possible source
- Buy a cheap KVM VPS somewhere, get an Hurricane Electric IPv6 block to it and then distribute that using OpenVPN.