I've tried to get the PRTG Server running when my Nic has a Ip in the range 169.254.x.x range. When i give the Nic another adress, ip shows up in the administrative tools and everything works fine, but with the zero conf ip adress the interface does not show up, access is not possible. Also if choose "any interface". It doens't make any difference if i assign the ip staticly or realy doing zero config. Please no discussion if zero config ip makes sense, i need it for educational reasons (yeah i also know i can ad a dhcp server). Thanks for your help to make it working.