Sorry that was my Mikrotik Router. Unfortunately you have to deactivate neighbour discovery per interface. I've do so now manually and traffic should have vanished. Thanks for letting me know. 73 de Marc, LX1DUC Quoting Don Moore <ve3zda(a)gmail.com>om>: > (Please trim inclusions from previous messages) > _______________________________________________ > Whoever is operating (if valid) > 176.9.140.86 name = ampr-gw.fks-de.ham.lu please cease and desist sending > data using the following encap line. > 11:30:13.339166 IP 176.9.140.86 > 192.168.1.150: IP 0.0.0.0.5678 > > 255.255.255.255.5678: UDP, length 115 (ipip-proto-4) > > 73, Don - ve3zda >