must ping comp with tunnel before connecting from others

deathdonut · July 13, 2008, 06:37:42 PM

My tunnel is set up and working using /etc/network/interfaces under debian. I also have radvd running, and forwarding enabled. On any other computer in the network though, I can only connect to an ipv6 site like ipv6.google.com after i have pinged the computer with the tunnel connection. ideas?

broquea · July 16, 2008, 01:09:23 PM

Probably need some sort of keepalive. Try using an IPv6 available NTP server, it will constantly check to update time, and keep activity going over IPv6.

deathdonut · July 16, 2008, 01:25:38 PM

the tunnel itself stays up - from the gateway machine it works fine - just from others it doesnt. I have taken to having a console open with ping6 -i 5 open when using ipv6, but its quite annoying.

broquea · July 16, 2008, 01:37:01 PM

Quote from: deathdonut on July 16, 2008, 01:25:38 PM
the tunnel itself stays up - from the gateway machine it works fine - just from others it doesnt. I have taken to having a console open with ping6 -i 5 open when using ipv6, but its quite annoying.

Yes, I figured you meant the machine behind the gateway. On that LAN client, have it use NTP as the keepalive rather than a window running a ping. Same effect, less annoying, and your time stays synched :D I can't think of any off the top of my head, but Google will probably know what is local to you.

We'll be working on updating our NTP devices to be dual-stack, and will let folks know when that is complete so they can use them.

elventear · May 20, 2009, 07:12:11 AM

I am having the same issue. Is this problem related to the tunnel itself? Or the routing table? Is there any other ways to solve this besides having this work around?

piojan · May 21, 2009, 09:40:49 AM

Code Select

C:\Documents and Settings\pj>ntpq -6 -pcrv ipv6.bema.one.pl
Temporary failure in name resolution

I use ntpd from Meinberg for Windows and probably it is not fully ipv6 ready.
On a linux box I dosn't have any ntpd ipv6 problem.

CyberLine · May 25, 2009, 01:11:44 PM

Same Problem here. From the Tunnel host i have permanent ipv6 connection but on any client i need to ping the nexthop ip every 5 seconds or using ntp to be staying online with v6.

CyberLine · May 26, 2009, 11:13:11 PM

It is working for me now without Pinging.

I use the routed /64 net on the Internal side of my Router with radvd and every client gets an IP from it and could ping, surf or whatever with this.

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must ping comp with tunnel before connecting from others