According to the tunnelinfo, my tunnel isn't returning the pings of the tunnelbot. My `tcpdump` tells me my tunnel is working properly (tested from a remote IPv6-enabled shellserver), but it doesn't show the 20 ICMPv6-pinging-spree from the tunnelbot. Because my tunnel is working properly and there aren't any firewall-rules which could block the tunnelbot-pings, I think there might be something wrong with the PoP's tunnelbot. (Yes, this is the same ticket-content as with my previous ticket, but with a different PoP. I'm a lazy MoFo, I know ;))