Sound similar to debian bug : https://bugs.debian.org/cgi- bin/bugreport.cgi?bug=712503
The situation doesn't occur on Xenial (16.04 LTS), but present in Trusty (14.04) as a fix has been first introduce in Ubuntu with version : isc- dhcp (4.3.3-2) Trusty : #netstat -tulp | grep -i dhclient udp 0 0 *:bootpc *:* 23402/dhclient udp 0 0 *:bootpc *:* 1589/dhclient udp 0 0 *:33749 *:* 1589/dhclient udp 0 0 *:11662 *:* 23402/dhclient udp6 0 0 [::]:7082 [::]:* 1589/dhclient udp6 0 0 [::]:12668 [::]:* 23402/dhclient Xenial: # netstat -tulp | grep -i dhclient Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name udp 0 0 *:bootpc *:* 142/dhclient # changelog isc-dhcp (4.3.3-2) unstable; urgency=medium ... ===> * Disable NSUPDATE (closes: #712503). <== ... ** Bug watch added: Debian Bug tracker #712503 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=712503 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1176046 Title: isc-dhcp dhclient listens on extra random ports To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1176046/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
