Hello Jeroen, I did allready install the Tun/Tap drivers as per instructions in the FAQ. The problem was something else. I had the wrong tunnel type, 'heartbeat' instead of 'ayiya'. Aiccu did nog give an error message about that. After changing to another ayiya type tunnel it worked. Also aiccu does not give any error message when 'verbose' is not set to 'true' in /etc/aiccu.conf. It was totally silent when I had an error in my username/password and had a login failure. The parameter for 'ipv6_interface' seems irrelevant, can be 'sixxs' or anything else. It always uses /dev/tun0 as the character device file to create an interface named 'tun0'. Performing a 'cd /dev' is not nessecary. So what is the meaning of the parameter 'ipv6_interface'? regards, Frits.