Public bug reported: Immediately after the installation of arpwatch from the repositories it works as expected. I expected it to also work after reboot.
However, after the reboot there is no arpwatch process running and I don't receive any messages. Manually restarting it (sudo systemctl restart arpwatch) works. From the log-files I conclude that arpwatch is started too early during system boot process and immediately exits, since the network is not ready yet. It should be noted that a legacy init script (/etc/init.d/arpwatch) is responsible for starting arpwatch. There doesn't seem to be any systemd unit file. I'm on Xubuntu 16.10 (Yakkety Yak), 64 bit. arpwatch version is: 2.1a15-2. Here's the essence of what I tried: $ ps -A | grep arp $ systemctl --all | grep arp arpwatch.service loaded active exited LSB: arpwatch daemon $ journalctl | grep arpwatch Jan 09 18:18:28 XXXXXXX systemd[1]: Starting LSB: arpwatch daemon... Jan 09 18:18:29 XXXXXXX arpwatch[1663]: bad interface eth0: eth0: no IPv4 address assigned - assuming unconfigured interface Jan 09 18:18:29 XXXXXXX arpwatch[1693]: pcap open eth0: eth0: That device is not up Jan 09 18:18:29 XXXXXXX arpwatch[1570]: Starting Ethernet/FDDI station monitor daemon: (chown arpwatch /var/lib/arpwatch/eth0.dat) arpwatch-eth0. Jan 09 18:18:29 XXXXXXX arpwatch[1747]: bad interface wlan0: wlan0: no IPv4 address assigned - assuming unconfigured interface Jan 09 18:18:29 XXXXXXX arpwatch[1570]: Starting Ethernet/FDDI station monitor daemon: (chown arpwatch /var/lib/arpwatch/wlan0.dat) arpwatch-wlan0. Jan 09 18:18:29 XXXXXXX systemd[1]: Started LSB: arpwatch daemon. Jan 09 18:18:29 XXXXXXX audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=arpwatch comm="systemd" exe="/lib/systemd/systemd" hostname=? addr=? terminal=? res=success' Jan 09 18:18:29 XXXXXXX arpwatch[1748]: pcap open wlan0: wlan0: That device is not up $ sudo systemctl start arpwatch $ ps -A | grep arp $ sudo systemctl restart arpwatch $ ps -A | grep arp 9484 ? 00:00:00 arpwatch $ I found two possibly related reports for Rasbian and Debian: https://raspberrypi.stackexchange.com/questions/59225/arpwatch-fails-to-autostart https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=782057 ** Affects: arpwatch (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1655131 Title: arpwatch does not start properly on system boot, but immediately exits (legacy SysVinit-script, no systemd unit file). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/arpwatch/+bug/1655131/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
