Admitting I know very little about apparmor, here is the profile that worked
for me:
# cat /etc/apparmor.d/usr.sbin.dhcpd
# vim:syntax=apparmor
#include <tunables/global>
/usr/sbin/dhcpd {
#include <abstractions/base>
#include <abstractions/nameservice>
capability chown,
capability dac_override,
capability net_bind_service,
capability net_raw,
capability setgid,
capability setuid,
capability sys_chroot,
network inet raw,
network packet raw,
/etc/dhcp/dhcpd.conf r,
/etc/dhcp/dhcpd6.conf r,
/etc/bind/* r,
/etc/hosts.allow r,
/etc/hosts.deny r,
@{PROC}/net/dev r,
/usr/sbin/dhcpd rmix,
/var/lib/dhcp/dhcpd.leases* rwl,
/var/lib/dhcp/dhcpd6.leases* rwl,
/{,var/}run/dhcp-server/dhcpd.pid wl,
}
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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to isc-dhcp in Ubuntu.
https://bugs.launchpad.net/bugs/1901373
Title:
isc-dhcp-server AppArmor Denied on
/proc/sys/net/ipv4/ip_local_port_range
Status in isc-dhcp package in Ubuntu:
Confirmed
Bug description:
The following AppArmor denial errors are shown on startup:
Oct 25 00:52:00 xxx kernel: [ 556.231990] audit: type=1400
audit(1603601520.710:32): apparmor="DENIED" operation="open"
profile="/usr/sbin/dhcpd" name="/proc/sys/net/ipv4/ip_local_port_range"
pid=1982 comm="dhcpd" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
Oct 25 00:52:00 xxx kernel: [ 556.232257] audit: type=1400
audit(1603601520.710:33): apparmor="DENIED" operation="open"
profile="/usr/sbin/dhcpd" name="/proc/sys/net/ipv4/ip_local_port_range"
pid=1982 comm="dhcpd" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
Fix is to edit /etc/apparmor.d/local/usr.sbin.dhcpd to have:
@{PROC}/sys/net/ipv4/ip_local_port_range r,
'lsb_release -rd':
Description: Ubuntu 20.04.1 LTS
Release: 20.04
isc-dhcp-server:
Installed: 4.4.1-2.1ubuntu5
Candidate: 4.4.1-2.1ubuntu5
Version table:
*** 4.4.1-2.1ubuntu5 500
500 http://us.archive.ubuntu.com/ubuntu focal/main amd64 Packages
100 /var/lib/dpkg/status
apparmor:
Installed: 2.13.3-7ubuntu5.1
Candidate: 2.13.3-7ubuntu5.1
Version table:
*** 2.13.3-7ubuntu5.1 500
500 http://us.archive.ubuntu.com/ubuntu focal-updates/main amd64
Packages
100 /var/lib/dpkg/status
2.13.3-7ubuntu5 500
500 http://us.archive.ubuntu.com/ubuntu focal/main amd64 Packages
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1901373/+subscriptions
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