Hi! I just wanted to add that I just noticed the same problem on a machine with arpalert monitoring four network interfaces. arpalert 2.0.11-7.1 (Debian jessie, amd64) Regards, Thomas Arendsen Hein -- thomas@intevation.de - http://intevation.de/~thomas/ - OpenPGP key: 0x5816791A Intevation GmbH, Neuer Graben 17, 49074 Osnabrueck - AG Osnabrueck, HR B 18998 Geschaeftsfuehrer: Frank Koormann, Bernhard Reiter, Dr. Jan-Oliver Wagner