Thanks Chad & Bob, I'm replying to the list to update the thread. I double checked the permissions and went ahead as a test and ran kea as root and I'm still getting the same error.
ps aux | grep kea root 13707 0.0 1.2 44312 25060 ? Ss 17:17 0:00 /usr/sbin/kea-dhcp4 -c /etc/kea/kea-dhcp4.conf getcap /usr/sbin/kea-dhcp4 /usr/sbin/kea-dhcp4 = cap_net_bind_service,cap_net_raw+ep On Tue, Mar 8, 2022 at 10:46 AM Chad Catlett <> wrote: > On 3/8/22 08:54, Dustin Berube wrote: > > 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 > > > Dustin, > > Ensure that Kea is running proper permissions. Not being able to send the > offer makes me think Kea isn't running as root and needs additional > permissions to send raw packets. If running on Linux, check out > https://kea.readthedocs.io/en/kea-2.0.2-doc/arm/install.html#running-kea-from-a-non-root-account-on-linux > . > > > Chad > > -- > Chad Catlett > >
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