[Kea-users] [EXTERNAL] Re: Need to have DHCP Relay in order for Kea to work...?
Ubence Quevedo
thatrat at gmail.com
Mon Jul 22 10:54:44 UTC 2024
I tested over the weekend by turning the DHCP Relay off on the pfSense
gateway, and did a tcpdump on both the client and the server.
I think I'm seeing the broadcasts from the client I was testing on the
server, and it *looks* like the client is receiving the response, but the
IP isn't getting assigned to the system.
This is illustrated in the traffic from dhcp-client_without_relay.txt
and dhcp-server_without_relay.txt.
As soon as I turned the DHCP Relay back on, the client properly got an IP
address which is illustrated in dhcp_with_relay.txt.
Maybe I have something misconfigured in my Kea conf? I'm a bit baffled by
this since other broadcast traffic is working on my network.
Any thoughts on what I should be looking at next or checking in my Kea conf?
-Ubence
On Fri, Jul 19, 2024 at 4:18 AM Ubence Quevedo <thatrat at gmail.com> wrote:
> Thanks for the response and the link, it is very helpful.
>
> I'm seeing the DHCP relay traffic I would expect to see.
>
> I'm going to test over the weekend disabling the DHCP relay and see what I
> see then.
>
> -Ubence
>
> On Thu, Jul 18, 2024 at 1:29 AM DDFR | Ronald Blaas <ronald.blaas at ddfr.nl>
> wrote:
>
>> A yes I see.
>>
>> You are using virtual interfaces.
>> This should work.
>>
>> As for relay, no you do not need relay as the DHCP server is configured
>> inside the same network.
>>
>> Like suggested by others you need to run a tcpdump to see what/if packets
>> are received by your dhcp server.
>>
>> An example would be: tcpdump -i eno2.11 port 67 or port 68 -e -n -vv
>> (source <https://unixhealthcheck.com/blog?id=433>)
>>
>> Should be run as root (or sudo)
>>
>> You should see some traffic from machines requesting DHCP
>>
>>
>> regards
>>
>>
>> Ronald Blaas
>>
>>
>>
>>
>> ------------------------------
>> *From:* Kea-users <kea-users-bounces at lists.isc.org> on behalf of Ubence
>> Quevedo <thatrat at gmail.com>
>> *Sent:* Wednesday, July 17, 2024 13:30
>> *To:* Kea user's list <kea-users at lists.isc.org>
>> *Subject:* Re: [Kea-users] [EXTERNAL] Re: Need to have DHCP Relay in
>> order for Kea to work...?
>>
>> U ontvangt niet vaak e-mail van thatrat at gmail.com. Meer informatie over
>> waarom dit belangrijk is <https://aka.ms/LearnAboutSenderIdentification>
>> Thanks for the response.
>>
>> Here are the interfaces configured on the server. eno2 is the main
>> interface [untagged] and then there is eno2.11 and eno2.12 respectively for
>> vlan 11 and 12:
>> eno2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
>> inet 192.168.10.3 netmask 255.255.255.0 broadcast 192.168.10.255
>> inet6 fe80::f604:def0:9990:a797 prefixlen 64 scopeid 0x20<link>
>> ether 50:eb:f6:4f:6c:2e txqueuelen 1000 (Ethernet)
>> RX packets 21002000 bytes 4720351435 (4.7 GB)
>> RX errors 0 dropped 0 overruns 0 frame 0
>> TX packets 5775391 bytes 1207246387 (1.2 GB)
>> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
>> device interrupt 16 memory 0x51200000-51220000
>>
>> eno2.11: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
>> inet 192.168.11.3 netmask 255.255.255.0 broadcast 192.168.11.255
>> inet6 fd19:e769:2155:aa4a:2ca5:722f:5815:fd88 prefixlen 64
>> scopeid 0x0<global>
>> inet6 fd19:e769:2155:aa4a:8123:1ebe:15d1:88a1 prefixlen 64
>> scopeid 0x0<global>
>> inet6 fe80::1b5:af43:403b:d5d7 prefixlen 64 scopeid 0x20<link>
>> inet6 fd19:e769:2155:aa4a:8997:46a6:a4fc:ddbc prefixlen 64
>> scopeid 0x0<global>
>> inet6 fd19:e769:2155:aa4a:83de:c6c8:c181:5dbe prefixlen 64
>> scopeid 0x0<global>
>> inet6 fd19:e769:2155:aa4a:596c:3610:d7b4:1d18 prefixlen 64
>> scopeid 0x0<global>
>> inet6 fd19:e769:2155:aa4a:a2ed:50cf:5609:5e0e prefixlen 64
>> scopeid 0x0<global>
>> inet6 fd19:e769:2155:aa4a:bcfe:867f:4dc:c8f8 prefixlen 64
>> scopeid 0x0<global>
>> inet6 fd19:e769:2155:aa4a:14a6:e870:b2ad:d2d9 prefixlen 64
>> scopeid 0x0<global>
>> ether 50:eb:f6:4f:6c:2e txqueuelen 1000 (Ethernet)
>> RX packets 5820439 bytes 1191558319 (1.1 GB)
>> RX errors 0 dropped 11 overruns 0 frame 0
>> TX packets 2733488 bytes 637055127 (637.0 MB)
>> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
>>
>> eno2.12: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
>> inet 192.168.12.3 netmask 255.255.255.0 broadcast 192.168.12.255
>> inet6 fe80::fda3:7df7:98b0:d9e6 prefixlen 64 scopeid 0x20<link>
>> ether 50:eb:f6:4f:6c:2e txqueuelen 1000 (Ethernet)
>> RX packets 7737728 bytes 1816607005 (1.8 GB)
>> RX errors 0 dropped 0 overruns 0 frame 0
>> TX packets 529891 bytes 125658614 (125.6 MB)
>> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
>>
>> My interfaces in kea-dhcp4.conf are configured like:
>> "interfaces": [ "eno2/192.168.10.3","eno2.11/192.168.11.3","eno2.12/
>> 192.168.12.3" ]
>>
>> This is why I'm a little baffled why I need the dhcp relay since all of
>> the interfaces should be listening on each vlan but aren't picking up the
>> traffic.
>>
>> Routing has been an issue on my network, which is related to another post
>> I'm going to make later with bridged interfaces and dhcp requests from VMs
>> to those bridged interfaces not getting IP addresses even though the server
>> is receiving the request but the client isn't acknowledging them for some
>> reason.
>>
>> -Ubence
>>
>> On Tue, Jul 16, 2024 at 11:52 PM DDFR | Ronald Blaas <
>> ronald.blaas at ddfr.nl> wrote:
>>
>> Hi
>>
>> Not really sure what you mean here: "has one interface that I've setup
>> with vlan interfaces"
>>
>> Like what has been said before, either the DHCP server has an IP address
>> in every IP subnet or you will have to make use of DHCP relay.
>>
>> The DHCP server must know from which network the DHCP request is coming
>> from.
>>
>> As for logging, if there is nothing in the log you must have a routing
>> problem (it is always routing 😋)
>>
>>
>>
>> Ronald
>>
>> ------------------------------
>> *From:* Kea-users <kea-users-bounces at lists.isc.org> on behalf of Ubence
>> Quevedo <thatrat at gmail.com>
>> *Sent:* Tuesday, July 16, 2024 13:04
>> *To:* Kea user's list <kea-users at lists.isc.org>
>> *Subject:* Re: [Kea-users] [EXTERNAL] Re: Need to have DHCP Relay in
>> order for Kea to work...?
>>
>> U ontvangt niet vaak e-mail van thatrat at gmail.com. Meer informatie over
>> waarom dit belangrijk is <https://aka.ms/LearnAboutSenderIdentification>
>> Thanks for all of the responses on this.
>>
>> The system that is the Kea DHCP server [an Ubuntu system] has one
>> interface that I've setup with vlan interfaces.
>>
>> I can access these other interfaces and verified through nmap that port
>> 67 is open on all interfaces.
>>
>> I can't seem to find any kind of ip helper option in the Unifi Controller
>> [v8.2.93 running on a virtual Ubuntu system].
>>
>> I've reconfigured the DHCP Relay on the pfSense to point to all of the
>> interfaces, and I'm now seeing the traffic I'm expecting to see, which is
>> fine since. understand a little better of what might be going on.
>>
>> Just a little confused as to why the broadcast traffic for DHCP requests
>> doesn't seem to be picked up on the vlan interfaces on the server.
>>
>> I do have another question, but I'll put that in a separate post since it
>> doesn't seem to be related to this question at hand.
>>
>> -Ubence
>>
>> On Mon, Jul 15, 2024 at 6:59 AM Joe Craig <JCraig at applieddigital.com>
>> wrote:
>>
>> Question about the setup. On the network switches that the DHCP requests
>> would hit first, do you have IP Helpers configured? In my experience that’s
>> what I’ve had to do to ensure that the packets make it to the DHCP server
>> without a DHCP Relay. I’m in an environment where I cannot deploy a DHCP
>> Relay service, so I am leveraging the IP Helpers on an L3 switch to forward
>> those requests. This is passing through an Cisco firewall and all that.
>> Hope that helps.
>>
>>
>>
>> Thanks,
>>
>>
>>
>> *Joseph Craig*
>> Systems Engineer
>>
>>
>>
>>
>> *From:* Kea-users <kea-users-bounces at lists.isc.org> *On Behalf Of *DDFR
>> | Ronald Blaas
>> *Sent:* Monday, July 15, 2024 2:15 AM
>> *To:* kea-users at lists.isc.org
>> *Subject:* [EXTERNAL] Re: [Kea-users] Need to have DHCP Relay in order
>> for Kea to work...?
>>
>>
>>
>> You don't often get email from ronald.blaas at ddfr.nl. Learn why this is
>> important <https://aka.ms/LearnAboutSenderIdentification>
>>
>> Not really sure how you have your network setup.
>>
>>
>>
>> But in my belief, if you want dhcp to work without RELAY you have to make
>> sure your DHCP server is directly connected to all the LANs. So your DHCP
>> server will need to have multiple Nics.
>>
>>
>>
>> Is there a particular reason you do not want to have a dhcp relay?
>>
>>
>>
>> I have a kinda similar setup and am using DHCP relay. It is operating as
>> expected and without problems.
>>
>>
>>
>> It is also wise to share the output of your log file with the error you
>> are receiving.
>>
>> Tis helps in pinpointing the problem.
>>
>>
>>
>> Regards
>>
>>
>>
>>
>>
>> Ronald
>>
>>
>>
>>
>> ------------------------------
>>
>> *From:* Kea-users <kea-users-bounces at lists.isc.org> on behalf of Ubence
>> Quevedo <thatrat at gmail.com>
>> *Sent:* Monday, July 15, 2024 00:26
>> *To:* kea-users at lists.isc.org <kea-users at lists.isc.org>
>> *Subject:* [Kea-users] Need to have DHCP Relay in order for Kea to
>> work...?
>>
>>
>>
>> U ontvangt niet vaak e-mail van thatrat at gmail.com. Meer informatie over
>> waarom dit belangrijk is <https://aka.ms/LearnAboutSenderIdentification>
>>
>> Hi Everyone,
>>
>>
>>
>> I’ve been using Kea for just under a year for a home setup on a Linux
>> Ubuntu server. I switched from isc dhcp since it was end of life. My
>> setup has a lot of MAC address reservations with some general pools for
>> systems that don’t have IP reservations.
>>
>>
>>
>> I also have a few vlans set up with the reservations for devices on each
>> of the vlans. I’m using pfSense as my gateway with some Unifi equipment
>> that is vlan aware.
>>
>>
>>
>> I’m running into an issue and I’m not sure why and would love some advice
>> on how to look into this.
>>
>>
>>
>> I have the interfaces on the system setup that is running Kea, to
>> advertise on the untagged network [mostly some servers], vlan 11 [user
>> systems], and vlan12 [IoT devices].
>>
>>
>>
>> I don’t have the firewall in pfSense to block traffic between these
>> networks yet, so they can all freely talk to each other.
>>
>>
>>
>> Even though I have my Kea configured to advertise on all of the
>> interfaces [untagged, 11, 12], I can’t seem to get anything to work unless
>> I have the DHCP Relay service setup on the pfSense device to redirect all
>> DHCP traffic to the Kea system’s untagged IP address [192.168.10.3].
>>
>>
>>
>> I can verify through nmap that udp port 67 is running on all three
>> interfaces.
>>
>>
>>
>> If I turn off the DHCP Relay service, I was expecting the interfaces to
>> pick up on the DHCP requests from devices on all of these networks.
>>
>>
>>
>> This doesn’t happen and devices don’t get addresses. I’ve even watched
>> the logs I’ve split out and nothing is written for the duration that the
>> relay service is turned off. As soon as I turn it back on, I start seeing
>> traffic again.
>>
>>
>>
>> I’m running Kea 2.6.0.
>>
>>
>>
>> I’d love to turn the DHCP Relay off to then try to troubleshoot another
>> issue I’m having with bridging interfaces to VMs and then having the VM
>> interface assigned to a vlan other than the bridged interface. It seems to
>> work for something else I’m doing, but just trying to rule some things
>> out. Probably another post if I can figure out why the DHCP Relay seems to
>> need to be on.
>>
>>
>>
>> Any ideas why I need the DHCP Relay service on another device even though
>> all of the interfaces on each respective vlan are configured to listen for
>> dhcp requests?
>>
>>
>>
>> -Ubence
>> --
>> ISC funds the development of this software with paid support
>> subscriptions. Contact us at https://www.isc.org/contact/ for more
>> information.
>>
>> To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users.
>>
>> Kea-users mailing list
>> Kea-users at lists.isc.org
>> https://lists.isc.org/mailman/listinfo/kea-users
>>
>> --
>> ISC funds the development of this software with paid support
>> subscriptions. Contact us at https://www.isc.org/contact/ for more
>> information.
>>
>> To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users.
>>
>> Kea-users mailing list
>> Kea-users at lists.isc.org
>> https://lists.isc.org/mailman/listinfo/kea-users
>>
>> --
>> ISC funds the development of this software with paid support
>> subscriptions. Contact us at https://www.isc.org/contact/ for more
>> information.
>>
>> To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users.
>>
>> Kea-users mailing list
>> Kea-users at lists.isc.org
>> https://lists.isc.org/mailman/listinfo/kea-users
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.isc.org/pipermail/kea-users/attachments/20240722/d2be7ead/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 5498 bytes
Desc: not available
URL: <https://lists.isc.org/pipermail/kea-users/attachments/20240722/d2be7ead/attachment-0001.png>
-------------- next part --------------
root at cube:~# tcpdump -i eno2.11 port 67 -e -n -vv
tcpdump: listening on eno2.11, link-type EN10MB (Ethernet), snapshot length 262144 bytes
03:02:35.709683 c8:2a:14:45:53:24 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 339: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 325)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 297, xid 0x8a3fbed6, secs 1, Flags [none] (0x0000)
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Request
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Hostname (12), length 13: "ubuntu-system"
03:02:37.710078 c8:2a:14:45:53:24 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 339: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 325)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 297, xid 0x32fbf73e, secs 1, Flags [none] (0x0000)
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Discover
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Hostname (12), length 13: "ubuntu-system"
03:02:40.519874 c8:2a:14:45:53:24 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 339: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 325)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 297, xid 0x6164142d, secs 2, Flags [none] (0x0000)
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Discover
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Hostname (12), length 13: "ubuntu-system"
03:02:45.380603 c8:2a:14:45:53:24 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 339: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 325)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 297, xid 0xadb465fd, secs 7, Flags [none] (0x0000)
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Discover
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Hostname (12), length 13: "ubuntu-system"
03:02:54.290465 c8:2a:14:45:53:24 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 339: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 325)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 297, xid 0x44117e87, secs 16, Flags [none] (0x0000)
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Discover
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Hostname (12), length 13: "ubuntu-system"
03:03:10.842163 c8:2a:14:45:53:24 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 339: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 325)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 297, xid 0x46ac421c, secs 33, Flags [none] (0x0000)
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Discover
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Hostname (12), length 13: "ubuntu-system"
03:03:42.844336 c8:2a:14:45:53:24 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 339: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 325)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 297, xid 0xd00c1ec4, secs 65, Flags [none] (0x0000)
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Discover
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Hostname (12), length 13: "ubuntu-system"
03:03:42.853973 00:02:c9:2d:fb:2b > 50:eb:f6:4f:6c:2e, ethertype IPv4 (0x0800), length 339: (tos 0x0, ttl 64, id 623, offset 0, flags [none], proto UDP (17), length 325)
192.168.11.1.67 > 192.168.11.3.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 297, hops 1, xid 0xd00c1ec4, secs 65, Flags [none] (0x0000)
Gateway-IP 192.168.11.1
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Discover
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Hostname (12), length 13: "ubuntu-system"
03:03:42.855520 50:eb:f6:4f:6c:2e > 00:02:c9:2d:fb:2b, ethertype IPv4 (0x0800), length 421: (tos 0x0, ttl 64, id 15771, offset 0, flags [DF], proto UDP (17), length 407)
192.168.11.3.67 > 192.168.11.1.67: [bad udp cksum 0x98e9 -> 0x2aa4!] BOOTP/DHCP, Reply, length 379, hops 1, xid 0xd00c1ec4, Flags [none] (0x0000)
Your-IP 192.168.11.118
Gateway-IP 192.168.11.1
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Offer
Subnet-Mask (1), length 4: 255.255.255.0
Default-Gateway (3), length 4: 192.168.11.1
Domain-Name-Server (6), length 4: 192.168.11.3
Hostname (12), length 36: "mac-ubuntu-laptop-wired.totusmel.com"
Domain-Name (15), length 12: "totusmel.com"
Lease-Time (51), length 4: 28800
Server-ID (54), length 4: 192.168.11.3
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Unknown (119), length 14: 2164,28532,30067,28005,27651,25455,27904
Classless-Static-Route (121), length 8: (192.168.100.0/24:192.168.11.1)
Classless-Static-Route-Microsoft (249), length 16: (192.168.100.0/24:192.168.11.1),(192.168.10.0/24:192.168.11.1)
03:03:42.883666 c8:2a:14:45:53:24 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 345: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 331)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 303, xid 0xd00c1ec4, secs 65, Flags [none] (0x0000)
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Request
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Server-ID (54), length 4: 192.168.10.3
Hostname (12), length 13: "ubuntu-system"
03:03:42.894477 00:02:c9:2d:fb:2b > 50:eb:f6:4f:6c:2e, ethertype IPv4 (0x0800), length 345: (tos 0x0, ttl 64, id 22255, offset 0, flags [none], proto UDP (17), length 331)
192.168.11.1.67 > 192.168.11.3.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 303, hops 1, xid 0xd00c1ec4, secs 65, Flags [none] (0x0000)
Gateway-IP 192.168.11.1
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Request
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Server-ID (54), length 4: 192.168.10.3
Hostname (12), length 13: "ubuntu-system"
-------------- next part --------------
root at ubuntu-system:~# tcpdump -i enp2s0f0 port 68 -e -n -vv
tcpdump: listening on enp2s0f0, link-type EN10MB (Ethernet), snapshot length 262144 bytes
03:02:35.700331 c8:2a:14:45:53:24 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 339: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 325)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 297, xid 0x8a3fbed6, secs 1, Flags [none] (0x0000)
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Request
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Hostname (12), length 13: "ubuntu-system"
03:02:37.700513 c8:2a:14:45:53:24 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 339: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 325)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 297, xid 0x32fbf73e, secs 1, Flags [none] (0x0000)
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Discover
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Hostname (12), length 13: "ubuntu-system"
03:02:40.509826 c8:2a:14:45:53:24 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 339: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 325)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 297, xid 0x6164142d, secs 2, Flags [none] (0x0000)
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Discover
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Hostname (12), length 13: "ubuntu-system"
03:02:45.369809 c8:2a:14:45:53:24 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 339: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 325)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 297, xid 0xadb465fd, secs 7, Flags [none] (0x0000)
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Discover
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Hostname (12), length 13: "ubuntu-system"
03:02:54.285652 c8:2a:14:45:53:24 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 339: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 325)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 297, xid 0x44117e87, secs 16, Flags [none] (0x0000)
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Discover
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Hostname (12), length 13: "ubuntu-system"
03:03:10.830129 c8:2a:14:45:53:24 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 339: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 325)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 297, xid 0x46ac421c, secs 33, Flags [none] (0x0000)
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Discover
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Hostname (12), length 13: "ubuntu-system"
03:03:42.832802 c8:2a:14:45:53:24 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 339: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 325)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 297, xid 0xd00c1ec4, secs 65, Flags [none] (0x0000)
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Discover
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Hostname (12), length 13: "ubuntu-system"
03:03:42.871930 00:02:c9:2d:fb:2b > c8:2a:14:45:53:24, ethertype IPv4 (0x0800), length 421: (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 407)
192.168.11.1.67 > 192.168.11.118.68: [udp sum ok] BOOTP/DHCP, Reply, length 379, hops 1, xid 0xd00c1ec4, Flags [none] (0x0000)
Your-IP 192.168.11.118
Gateway-IP 192.168.11.1
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Offer
Subnet-Mask (1), length 4: 255.255.255.0
Default-Gateway (3), length 4: 192.168.11.1
Domain-Name-Server (6), length 4: 192.168.11.3
Hostname (12), length 36: "mac-ubuntu-laptop-wired.totusmel.com"
Domain-Name (15), length 12: "totusmel.com"
Lease-Time (51), length 4: 28800
Server-ID (54), length 4: 192.168.10.3
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Unknown (119), length 14: 2164,28532,30067,28005,27651,25455,27904
Classless-Static-Route (121), length 8: (192.168.100.0/24:192.168.11.1)
Classless-Static-Route-Microsoft (249), length 16: (192.168.100.0/24:192.168.11.1),(192.168.10.0/24:192.168.11.1)
03:03:42.875140 c8:2a:14:45:53:24 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 345: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 331)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 303, xid 0xd00c1ec4, secs 65, Flags [none] (0x0000)
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Request
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Server-ID (54), length 4: 192.168.10.3
Hostname (12), length 13: "ubuntu-system"
03:03:42.911908 00:02:c9:2d:fb:2b > c8:2a:14:45:53:24, ethertype IPv4 (0x0800), length 421: (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 407)
192.168.11.1.67 > 192.168.11.118.68: [udp sum ok] BOOTP/DHCP, Reply, length 379, hops 1, xid 0xd00c1ec4, Flags [none] (0x0000)
Your-IP 192.168.11.118
Gateway-IP 192.168.11.1
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: ACK
Subnet-Mask (1), length 4: 255.255.255.0
Default-Gateway (3), length 4: 192.168.11.1
Domain-Name-Server (6), length 4: 192.168.11.3
Hostname (12), length 36: "mac-ubuntu-laptop-wired.totusmel.com"
Domain-Name (15), length 12: "totusmel.com"
Lease-Time (51), length 4: 28800
Server-ID (54), length 4: 192.168.10.3
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Unknown (119), length 14: 2164,28532,30067,28005,27651,25455,27904
Classless-Static-Route (121), length 8: (192.168.100.0/24:192.168.11.1)
Classless-Static-Route-Microsoft (249), length 16: (192.168.100.0/24:192.168.11.1),(192.168.10.0/24:192.168.11.1)
^C
10 packets captured
10 packets received by filter
0 packets dropped by kernel
root at ubuntu-system:~#
-------------- next part --------------
root at ubuntu-system:~# tcpdump -i enp2s0f0 port 68 -e -n -vv
tcpdump: listening on enp2s0f0, link-type EN10MB (Ethernet), snapshot length 262144 bytes
02:57:53.231623 c8:2a:14:45:53:24 > 00:02:c9:2d:fb:2b, ethertype IPv4 (0x0800), length 333: (tos 0x0, ttl 64, id 17363, offset 0, flags [DF], proto UDP (17), length 319)
192.168.11.118.68 > 192.168.10.3.67: [bad udp cksum 0x9806 -> 0x581e!] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 291, xid 0x2ebf2f42, secs 7196, Flags [none] (0x0000)
Client-IP 192.168.11.118
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Request
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 65535
Hostname (12), length 13: "ubuntu-system"
02:58:53.719846 c8:2a:14:45:53:24 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 339: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 325)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from c8:2a:14:45:53:24, length 297, xid 0x3929f28, secs 1, Flags [none] (0x0000)
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Request
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Parameter-Request (55), length 17:
Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname (12)
Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
Default-Gateway (3), Static-Route (33), YD (40), YS (41)
NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), Unknown (252)
RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 192.168.11.118
Hostname (12), length 13: "ubuntu-system"
02:58:53.753492 00:02:c9:2d:fb:2b > c8:2a:14:45:53:24, ethertype IPv4 (0x0800), length 421: (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 407)
192.168.11.1.67 > 192.168.11.118.68: [udp sum ok] BOOTP/DHCP, Reply, length 379, hops 1, xid 0x3929f28, Flags [none] (0x0000)
Your-IP 192.168.11.118
Gateway-IP 192.168.11.1
Client-Ethernet-Address c8:2a:14:45:53:24
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: ACK
Subnet-Mask (1), length 4: 255.255.255.0
Default-Gateway (3), length 4: 192.168.11.1
Domain-Name-Server (6), length 4: 192.168.11.3
Hostname (12), length 36: "mac-ubuntu-laptop-wired.totusmel.com"
Domain-Name (15), length 12: "totusmel.com"
Lease-Time (51), length 4: 28800
Server-ID (54), length 4: 192.168.10.3
Client-ID (61), length 7: ether c8:2a:14:45:53:24
Unknown (119), length 14: 2164,28532,30067,28005,27651,25455,27904
Classless-Static-Route (121), length 8: (192.168.100.0/24:192.168.11.1)
Classless-Static-Route-Microsoft (249), length 16: (192.168.100.0/24:192.168.11.1),(192.168.10.0/24:192.168.11.1)
More information about the Kea-users
mailing list