dhcpd doesn't acknowledge dhcp requests

Sean McMurray sean at mvtel.com
Tue Jun 2 22:03:00 UTC 2015


On 06/02/2015 02:33 PM, Peter Rathlev wrote:
> On Tue, 2015-06-02 at 13:06 -0700, Sean McMurray wrote:
>> I have a dhcp server that won't give out leases and doesn't
>> acknowledge DHCPDISCOVERs.
>>
>> I see the requests come in with tcpdump, but the daemon doesn't log
>> them and doesn't respond.
> Just guessing but I'm thinking either a firewall (e.g. iptables) could
> be blocking the traffic or the daemon is not listening to broadcasts,
> i.e. compiled with --enable-use-sockets or similar.
The firewall has port 67 open. The daemon is the stock package on centos7.
>
>>   >ss -anlp | grep ':67'
>> tcp    UNCONN     0      0 *:67                    *:*
>> users:(("dhcpd",21614,9))
> Does it really say TCP there? That's a little strange for a DHCP server.
> I'd expect it to have an entry for "raw" and one for "udp".
>
That's a copy/paste. That's really what it says.



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