After the last update to "isc-dhcp-server 4.2.4-1ubuntu10.2", my dhcpd stopped working and I had for first time the "Open a socket for LPF: Permission denied" error. I applied the workaround proposed in #2 and dhcpd is working again:
>> adding "network packet raw" to /etc/apparmor.d/usr.sbin.dhcpd >> sudo /etc/init.d/apparmor reload" ################## intronauta@Inspiron-N5010:~$ apt-cache policy isc-dhcp-server isc-dhcp-server: Installed: 4.2.4-1ubuntu10.2 Candidate: 4.2.4-1ubuntu10.2 Version table: *** 4.2.4-1ubuntu10.2 0 500 http://archive.ubuntu.com/ubuntu/ quantal-proposed/main amd64 Packages 100 /var/lib/dpkg/status 4.2.4-1ubuntu10.1 0 500 http://archive.ubuntu.com/ubuntu/ quantal-updates/main amd64 Packages 4.2.4-1ubuntu10 0 500 http://archive.ubuntu.com/ubuntu/ quantal/main amd64 Packages intronauta@Inspiron-N5010:~$ lsb_release -rd Description: Ubuntu 12.10 Release: 12.10 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1107686 Title: dhcpd: Open a socket for LPF: Permission denied To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1107686/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs