dhcpd doesn't acknowledge dhcp requests
Graham Clinch
g.clinch at lancaster.ac.uk
Tue Jun 2 22:40:27 UTC 2015
> 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.
>
> [snip]
>
> >ss -anlp | grep ':67'
> tcp UNCONN 0 0 *:67 *:*
> users:(("dhcpd",21614,9))
Is the daemon listening on interface em2?
# ss -anp | grep dhcpd
p_raw UNCONN 0 0 *:eth0 * users:(("dhcpd",24985,5))
[...]
Alternatively, running the daemon manually in debug mode (-d) should give some hints as to the interfaces it's discovered:
Listening on LPF/eth0/00:14:22:28:ad:83/192.168.125.0/24
Sending on LPF/eth0/00:14:22:28:ad:83/192.168.125.0/24
Sending on Socket/fallback/fallback-net
Graham
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