Package: network-manager
Version: 1.6.0-1
When i am using the default NetowkManager.conf which looks like:
[main]
plugins=ifupdown,keyfile
[ifupdown]
managed=false
NM sends bad DHCP-Requests. Here is an example dump:
% sudo dhcpdump -i enp0s31f6
TIME: 2017-02-15 07:53:30.353
IP: 0.0.0.0 (18:db:f2:4f:0:59) > 255.255.255.255 (ff:ff:ff:ff:ff:ff)
OP: 1 (BOOTPREQUEST)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: d404c631
SECS: 0
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 0.0.0.0
SIADDR: 0.0.0.0
GIADDR: 0.0.0.0
CHADDR: 18:db:f2:4f:00:59:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 3 (DHCPREQUEST)
OPTION: 50 ( 4) Request IP address 192.168.168.107
OPTION: 12 ( 12) Host name mschirmacher
OPTION: 55 ( 23) Parameter Request List 1 (Subnet mask)
28 (Broadcast address)
2 (Time offset)
3 (Routers)
15 (Domainname)
6 (DNS server)
12 (Host name)
1 (Subnet mask)
28 (Broadcast address)
2 (Time offset)
3 (Routers)
15 (Domainname)
6 (DNS server)
119 (Domain Search)
12 (Host name)
44 (NetBIOS name server)
47 (NetBIOS scope)
26 (Interface MTU)
121 (Classless Static Route)
42 (NTP servers)
249 (MSFT - Classless route)
33 (Static route)
252 (MSFT - WinSock Proxy Auto
Detect)
---------------------------------------------------------------------------
TIME: 2017-02-15 07:53:30.457
IP: 192.168.168.7 (5c:f3:fc:e6:20:7c) > 255.255.255.255
(ff:ff:ff:ff:ff:ff)
OP: 2 (BOOTPREPLY)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: d404c631
SECS: 0
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 192.168.168.107
SIADDR: 0.0.0.0
GIADDR: 0.0.0.0
CHADDR: 18:db:f2:4f:00:59:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 5 (DHCPACK)
OPTION: 58 ( 4) T1 86400 (24h)
OPTION: 59 ( 4) T2 151200 (1d18h)
OPTION: 51 ( 4) IP address leasetime 172800 (2d)
OPTION: 54 ( 4) Server identifier 192.168.168.7
OPTION: 1 ( 4) Subnet mask 255.255.255.0
OPTION: 3 ( 4) Routers 192.168.168.6
OPTION: 15 ( 19) Domainname intern.our.domain
OPTION: 6 ( 12) DNS server
192.168.168.7,172.29.0.8,172.29.0.9
OPTION: 3 ( 4) Routers 192.168.168.6
OPTION: 15 ( 19) Domainname intern.our.domain
OPTION: 6 ( 12) DNS server
192.168.168.7,172.29.0.8,172.29.0.9
OPTION: 42 ( 16) NTP servers
129.250.35.251,85.114.132.52,5.9.39.18,193.175.73.151
As you can see most options, especially Option 15 appears twice in the
request as well as in the response. Comsequently the genererates
/etc/resolv.conf would look like:
% cat /etc/resolv.conf
# Generated by NetworkManager
search intern.our.domainintern.our.domain
nameserver 192.168.168.7
nameserver 172.29.0.8
nameserver 172.29.0.9
Note the bad line "search intern.our.domainintern.our.domain" where NM
concatenated the domain names from the two Option 15 responses.
When i add the line dhcp=internal to the [main] section of the
NetworkManager.conf the DHCP request sent will not contain duplicate
option requests hence the answer will be correct, too, resulting in a
valid resolv.conf
FWIW here some more installed packages that might be relevant:
ii network-manager 1.6.0-1
ii network-manager-gnome 1.4.4-1
ii network-manager-openvpn 1.2.8-2
ii network-manager-openvpn-gnome 1.2.8-2
ii network-manager-vpnc 1.2.4-4
ii network-manager-vpnc-gnome 1.2.4-4
ii isc-dhcp-client 4.3.5-3
ii isc-dhcp-common 4.3.5-3
Thank you
