[Kea-users] Unable to send DHCPOFFER packet

Tue Mar 8 14:54:29 UTC 2022

Hello,

I'm running into an issue with Kea that I am unable to send the DHCPOFFER
packet to the client. After enabling debug I see that I'm getting a
permission denied error. The server is running Ubuntu 20.04, I've tried
the isc-kea packages for both 2.0.1 and 2.0.2 with the same results. Does
anyone have any suggestions on what to try?

2022-03-08 14:09:14.872 DEBUG [kea-dhcp4.packets/6691.140535278995904]
DHCP4_BUFFER_RECEIVED received buffer from 10.201.1.6:67 to 10.201.1.2:67
over interface ens192
2022-03-08 14:09:14.872 DEBUG [kea-dhcp4.options/6691.140535278995904]
DHCP4_BUFFER_UNPACK parsing buffer received from 10.201.1.6 to 10.201.1.2
over interface ens192
2022-03-08 14:09:14.873 DEBUG [kea-dhcp4.packets/6691.140535278995904]
DHCP4_PACKET_RECEIVED [hwtype=1 94:40:c9:40:f4:5c],
cid=[00:94:40:c9:40:f4:5c:00:00:00], tid=0x20: DHCPDISCOVER (type 1)
received from 10.201.1.6 to 10.201.1.2 on interface ens192
2022-03-08 14:09:14.873 DEBUG [kea-dhcp4.packets/6691.140535278995904]
DHCP4_QUERY_DATA [hwtype=1 94:40:c9:40:f4:5c],
cid=[00:94:40:c9:40:f4:5c:00:00:00], tid=0x20, packet details:
local_address=10.201.1.2:67, remote_address=10.201.1.6:67,
msg_type=DHCPDISCOVER (1), transid=0x20,
options:
  type=012, len=010: "esx-01-ilo" (string)
  type=050, len=004: 10.201.1.10 (ipv4-address)
  type=053, len=001: 1 (uint8)
  type=055, len=015: 1(uint8) 2(uint8) 3(uint8) 4(uint8) 6(uint8) 15(uint8)
28(uint8) 33(uint8) 42(uint8) 43(uint8) 44(uint8) 58(uint8) 59(uint8)
100(uint8) 101(uint8)
  type=060, len=007: "CPQRIB3" (string)
  type=061, len=010: 00:94:40:c9:40:f4:5c:00:00:00
2022-03-08 14:09:14.873 DEBUG [kea-dhcp4.dhcpsrv/6691.140535278995904]
DHCPSRV_CFGMGR_SUBNET4_ADDR selected subnet 10.201.1.0/24 for packet
received by matching address 10.201.1.6
2022-03-08 14:09:14.873 DEBUG [kea-dhcp4.packets/6691.140535278995904]
DHCP4_SUBNET_SELECTED [hwtype=1 94:40:c9:40:f4:5c],
cid=[00:94:40:c9:40:f4:5c:00:00:00], tid=0x20: the subnet with ID 1 was
selected for client assignments
2022-03-08 14:09:14.873 DEBUG [kea-dhcp4.packets/6691.140535278995904]
DHCP4_SUBNET_DATA [hwtype=1 94:40:c9:40:f4:5c],
cid=[00:94:40:c9:40:f4:5c:00:00:00], tid=0x20: the selected subnet details:
10.201.1.0/24
2022-03-08 14:09:14.873 DEBUG [kea-dhcp4.hosts/6691.140535278995904]
HOSTS_CFG_GET_ONE_SUBNET_ID_IDENTIFIER get one host with IPv4 reservation
for subnet id 1, identified by hwaddr=9440C940F45C
2022-03-08 14:09:14.873 DEBUG [kea-dhcp4.hosts/6691.140535278995904]
HOSTS_CFG_GET_ALL_IDENTIFIER get all hosts with reservations using
identifier: hwaddr=9440C940F45C
2022-03-08 14:09:14.873 DEBUG [kea-dhcp4.hosts/6691.140535278995904]
HOSTS_CFG_GET_ALL_IDENTIFIER_HOST using identifier: hwaddr=9440C940F45C,
found host: hwaddr=9440C940F45C ipv4_subnet_id=1 hostname=esx-01-ilo
ipv4_reservation=10.201.1.10 siaddr=(no) sname=(empty) file=(empty)
key=(empty) ipv6_reservations=(none)
2022-03-08 14:09:14.873 DEBUG [kea-dhcp4.hosts/6691.140535278995904]
HOSTS_CFG_GET_ALL_IDENTIFIER_COUNT using identifier hwaddr=9440C940F45C,
found 1 host(s)
2022-03-08 14:09:14.873 DEBUG [kea-dhcp4.hosts/6691.140535278995904]
HOSTS_CFG_GET_ONE_SUBNET_ID_IDENTIFIER_HOST using subnet id 1 and
identifier hwaddr=9440C940F45C, found host: hwaddr=9440C940F45C
ipv4_subnet_id=1 hostname=esx-01-ilo ipv4_reservation=10.201.1.10
siaddr=(no) sname=(empty) file=(empty) key=(empty) ipv6_reservations=(none)
2022-03-08 14:09:14.873 DEBUG [kea-dhcp4.dhcp4/6691.140535278995904]
DHCP4_CLASS_ASSIGNED [hwtype=1 94:40:c9:40:f4:5c],
cid=[00:94:40:c9:40:f4:5c:00:00:00], tid=0x20: client packet has been
assigned to the following class(es): KNOWN
2022-03-08 14:09:14.873 DEBUG [kea-dhcp4.dhcp4/6691.140535278995904]
DHCP4_CLASS_ASSIGNED [hwtype=1 94:40:c9:40:f4:5c],
cid=[00:94:40:c9:40:f4:5c:00:00:00], tid=0x20: client packet has been
assigned to the following class(es): ALL, VENDOR_CLASS_CPQRIB3, KNOWN
2022-03-08 14:09:14.873 DEBUG [kea-dhcp4.ddns/6691.140535278995904]
DHCP4_CLIENT_HOSTNAME_PROCESS [hwtype=1 94:40:c9:40:f4:5c],
cid=[00:94:40:c9:40:f4:5c:00:00:00], tid=0x20: processing client's Hostname
option
2022-03-08 14:09:14.874 DEBUG [kea-dhcp4.ddns/6691.140535278995904]
DHCP4_CLIENT_HOSTNAME_DATA [hwtype=1 94:40:c9:40:f4:5c],
cid=[00:94:40:c9:40:f4:5c:00:00:00], tid=0x20: client sent Hostname option:
esx-01-ilo
2022-03-08 14:09:14.874 DEBUG [kea-dhcp4.ddns/6691.140535278995904]
DHCP4_RESERVED_HOSTNAME_ASSIGNED [hwtype=1 94:40:c9:40:f4:5c],
cid=[00:94:40:c9:40:f4:5c:00:00:00], tid=0x20: server assigned reserved
hostname esx-01-ilo.flagler.cloud
2022-03-08 14:09:14.874 DEBUG [kea-dhcp4.dhcpsrv/6691.140535278995904]
DHCPSRV_MYSQL_GET_CLIENTID obtaining IPv4 leases for client ID
00:94:40:c9:40:f4:5c:00:00:00
2022-03-08 14:09:14.874 DEBUG [kea-dhcp4.dhcpsrv/6691.140535278995904]
DHCPSRV_MYSQL_GET_HWADDR obtaining IPv4 leases for hardware address
hwtype=1 94:40:c9:40:f4:5c
2022-03-08 14:09:14.874 DEBUG [kea-dhcp4.alloc-engine/6691.140535278995904]
ALLOC_ENGINE_V4_DISCOVER_HR client [hwtype=1 94:40:c9:40:f4:5c],
cid=[00:94:40:c9:40:f4:5c:00:00:00], tid=0x20 sending DHCPDISCOVER has
reservation for the address 10.201.1.10
2022-03-08 14:09:14.874 DEBUG [kea-dhcp4.dhcpsrv/6691.140535278995904]
DHCPSRV_MYSQL_GET_ADDR4 obtaining IPv4 lease for address 10.201.1.10
2022-03-08 14:09:14.875 INFO  [kea-dhcp4.leases/6691.140535278995904]
DHCP4_LEASE_ADVERT [hwtype=1 94:40:c9:40:f4:5c],
cid=[00:94:40:c9:40:f4:5c:00:00:00], tid=0x20: lease 10.201.1.10 will be
advertised
2022-03-08 14:09:14.875 DEBUG [kea-dhcp4.options/6691.140535278995904]
DHCP4_PACKET_PACK [hwtype=1 94:40:c9:40:f4:5c],
cid=[00:94:40:c9:40:f4:5c:00:00:00], tid=0x20: preparing on-wire format of
the packet to be sent
2022-03-08 14:09:14.875 DEBUG [kea-dhcp4.packets/6691.140535278995904]
DHCP4_PACKET_SEND [hwtype=1 94:40:c9:40:f4:5c],
cid=[00:94:40:c9:40:f4:5c:00:00:00], tid=0x20: trying to send packet
DHCPOFFER (type 2) from 10.201.1.2:67 to 255.255.255.255:68 on interface
ens192
2022-03-08 14:09:14.875 DEBUG [kea-dhcp4.packets/6691.140535278995904]
DHCP4_RESPONSE_DATA [hwtype=1 94:40:c9:40:f4:5c],
cid=[00:94:40:c9:40:f4:5c:00:00:00], tid=0x20: responding with packet
DHCPOFFER (type 2), packet details: local_address=10.201.1.2:67,
remote_address=255.255.255.255:68, msg_type=DHCPOFFER (2), transid=0x20,
options:
  type=001, len=004: 4294967040 (uint32)
  type=003, len=004: 10.201.1.1
  type=006, len=008: 10.203.255.11 10.203.255.12
  type=012, len=024: "esx-01-ilo.flagler.cloud" (string)
  type=015, len=013: "flagler.cloud" (string)
  type=042, len=004: 10.203.255.13
  type=051, len=004: 604800 (uint32)
  type=053, len=001: 2 (uint8)
  type=054, len=004: 10.201.1.2
  type=058, len=004: 64800 (uint32)
  type=059, len=004: 129600 (uint32)
  type=061, len=010: 00:94:40:c9:40:f4:5c:00:00:00
2022-03-08 14:09:14.875 ERROR [kea-dhcp4.packets/6691.140535278995904]
DHCP4_PACKET_SEND_FAIL [hwtype=1 94:40:c9:40:f4:5c],
cid=[00:94:40:c9:40:f4:5c:00:00:00], tid=0x20: failed to send DHCPv4
packet: pkt4 send failed: sendmsg() returned  with an error: Permission
denied

Thanks,
Dustin
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