I confirm I have the same behavior in Ubuntu 14.04.5 LTS with isc-dhcp- client version 4.2.4-7ubuntu12.7
I recompiled the isc-dhcp-client with the fix from http://forums.debian.net/viewtopic.php?f=10&t=95273 and I no longer have the issue: BEFORE: root@trustydhclient:~# lsof -i udp COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME dhclient 521 root 5u IPv4 7553 0t0 UDP *:bootpc dhclient 521 root 20u IPv4 7479 0t0 UDP *:50522 dhclient 521 root 21u IPv6 7480 0t0 UDP *:17754 AFTER: root@trustydhclient:~# lsof -i udp COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME dhclient 524 root 5u IPv4 7613 0t0 UDP *:bootpc -- 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
