[Pkg-utopia-maintainers] Bug#854186: network-manager: DHCP connection stopped working (however, it works perfectly by using the console)

[Sami Erjomaa]

I have this problem too with network-manager 1.6.0. For some reason
the dhcp offer is rejected by dhclient when using network-manager.

Feb  5 16:25:12 erebor systemd[1]: Started Network Manager Wait Online.
Feb  5 16:25:12 erebor dhclient[13084]: DHCPREQUEST of 192.168.1.35 on
eth0 to 255.255.255.255 port 67
Feb  5 16:25:12 erebor dhclient[13084]: DHCPACK of 192.168.1.35 from 192.168.1.1
Feb  5 16:25:12 erebor dhclient[13084]: no expiry time on offered lease.
Feb  5 16:25:12 erebor dhclient[13084]: Server added to list of
rejected servers.
Feb  5 16:25:13 erebor dhclient[13084]: DHCPDISCOVER on eth0 to
255.255.255.255 port 67 interval 8
Feb  5 16:25:13 erebor dhclient[13084]: DHCPOFFER from 192.168.1.1
rejected by rule 192.168.1.1 mask 255.255.255.255.

If I run dhclient on terminal the dhcp offer is accepted. The only
difference I can see when running dhclient on terminal and when it's
initiated by network-manager is the use of
/usr/lib/NetworkManager/nm-dhcp-helper.

I got the network-manager to work by changing the dhcp method to
internal by adding line "dhcp=internal" to
/etc/NetworkManager/NetworkManager.conf.

IP addresses in my network are assigned by ZyWall 5.