[Kea-users] Leases for known clients only - how ?

[Jan Rovner]

Hello,

I would like to ask about a pure static KEA DHCP server setup, where:

- only the well-known clients with static reservations for their MACs will get reserved IP addrs (leases)

- unknown clients/devices won't get anything (ideally no reply from DHCP server, or some kind of NAK)

If yes, may I ask for a working demo config file - I mean related declarations of pools and client reservations...

For my purposes, I am running a quite old, but working KEA 1.4 instance and would like to upgrade. To filter unwanted clients with unknown MACs, I had to create my own hook (extension written in .c) to accept the requests from registered clients only. And I would like to eliminate this solution...

Pieces of my hook code:

// std::cout << "pkt4_receive MAC : " << hwaddr->toText() << std::endl;

ConstHostPtr host;
ConstHostCollection reservations = HostMgr::instance().getAll(Host::IDENT_HWADDR, &hwaddr->hwaddr_[0], 6);
host = reservations.empty() ? 0 : reservations.at<http://reservations.at>(0);

...

if (!host) {
                LOG_INFO(user_chk_logger, USER_CHK_MAC_INVALID).arg(mac_info_str);

                // std::cout << "Host not found, setting status to NEXT_STEP_DROP" << std::endl;
                handle.setStatus(CalloutHandle::NEXT_STEP_DROP);
        }
        else {
                LOG_INFO(user_chk_logger, USER_CHK_MAC_VALID).arg(mac_info_str);

        // std::cout << "Host OK, accepting packtet" << std::endl;
        // std::cout << "Subnet ID is " << host->getIPv4SubnetID() << std::endl;
        }

Thank you very much.

Sincerely,
Jan Rovner
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