Same issue on the development branch of Ubuntu 16.04 using NetworkManager, OpenVPN and network-manager-openvpn.
Error: "Rejected send message" Error log: Jan 12 22:29:05 MYHOST NetworkManager[6549]: <info> Internal DNS: 192.168.55.1 Jan 12 22:29:05 MYHOST NetworkManager[6549]: <info> DNS Domain: '(none)' Jan 12 22:29:05 MYHOST NetworkManager[6549]: <info> No IPv6 configuration Jan 12 22:29:05 MYHOST NetworkManager[6549]: <info> VPN plugin state changed: started (4) Jan 12 22:29:05 MYHOST NetworkManager[6549]: <info> VPN connection 'MyVPN' (IP Config Get) complete. Jan 12 22:29:05 MYHOST NetworkManager[6549]: <info> (tun0): link connected Jan 12 22:29:05 MYHOST NetworkManager[6549]: <info> Writing DNS information to /sbin/resolvconf Jan 12 22:29:05 MYHOST dnsmasq[1470]: setting upstream servers from DBus Jan 12 22:29:05 MYHOST dnsmasq[1470]: using nameserver 192.168.0.1#53 Jan 12 22:29:05 MYHOST dnsmasq[1470]: using nameserver 192.168.55.1#53 for domain 10.in-addr.arpa Jan 12 22:29:05 MYHOST dbus[747]: [system] Rejected send message, 13 matched rules; type="method_return", sender=":1.34" (uid=0 pid=1470 comm="/usr/sbin/dnsmasq --no-resolv --keep-in-foreground") interface="(un Jan 12 22:29:05 MYHOST nm-dispatcher[7604]: Dispatching action 'vpn-up' for tun0 Jan 12 22:29:05 MYHOST NetworkManager[6549]: <info> keyfile: add connection in-memory (3fdc25eb-0cda-4958-aa8d-63280209f005,"tun0") Jan 12 22:29:05 MYHOST NetworkManager[6549]: <info> (tun0): device state change: unmanaged -> unavailable (reason 'connection-assumed') [10 20 41] -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1488056 Title: Rejected send message, 10 matched rules; type="method_return", sender=":1.84" Status in bind9 package in Ubuntu: Expired Status in network-manager package in Ubuntu: Confirmed Bug description: Seeing lots of those log entries. Here an example Aug 24 20:14:36 M1 NetworkManager[748]: <error> [1440404076.494991] [dns-manager/nm-dns-dnsmasq.c:398] update(): dnsmasq owner not found on bus: Could not get owner of name 'org.freedesktop.NetworkManager.dnsmasq': no such name Aug 24 20:14:36 M1 dbus[792]: [system] Rejected send message, 10 matched rules; type="method_return", sender=":1.84" (uid=0 pid=3300 comm="/usr/sbin/dnsmasq --no-resolv --keep-in-foreground") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.7" (uid=0 pid=748 comm="/usr/sbin/NetworkManager --no-daemon ") Attached info might help locating the issue. Thanks for any clues. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: dnsmasq 2.72-3ubuntu0.1 ProcVersionSignature: Ubuntu 3.19.0-26.28-generic 3.19.8-ckt4 Uname: Linux 3.19.0-26-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.17.2-0ubuntu1.3 Architecture: amd64 Date: Mon Aug 24 23:08:37 2015 InstallationDate: Installed on 2014-10-31 (297 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) PackageArchitecture: all SourcePackage: dnsmasq UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bind9/+bug/1488056/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp