[Dnsmasq-discuss] No DHCPOffer back but DHCPDiscover is being received by machine

[Josh H]

Hi there,

I'm receiving no DHCPOffer back from my DHCPDiscover. However, I can
tcpdump the machine running dnsmasq and it is receiving the DHCPOffer
packets.

Here's my very very simple dnsmasq.conf
# To disable dnsmasq's DNS server functionality.
port=0

# To enable dnsmasq's DHCP server functionality.
dhcp-range=192.168.1.3,192.168.1.8,255.255.255.240,12h

# Set gateway as Router. Following two lines are identical.
#dhcp-option=option:router,192.168.0.1
dhcp-option=3,192.168.0.1

# Set DNS server as Router.
dhcp-option=6,192.168.0.1

# Logging.
log-facility=/var/log/dnsmasq.log   # logfile path.
log-async
log-queries # log queries.
log-dhcp    # log dhcp related messages.

Here's the contents of /var/log/dnsmasq.log after running dhclient on a
machine connected to the subnet:
Apr 14 18:36:57 dnsmasq[1702]: started, version 2.80 DNS disabled
Apr 14 18:36:57 dnsmasq[1702]: compile time options: IPv6 GNU-getopt DBus
i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect
inotify dumpfile
Apr 14 18:36:57 dnsmasq-dhcp[1702]: DHCP, IP range 192.168.1.3 --
192.168.1.8, lease time 12h

I can see the service running with netstat -anp4:
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State
    PID/Program name
udp        0      0 0.0.0.0:67              0.0.0.0:*
    1702/dnsmasq
udp        0      0 0.0.0.0:1701            0.0.0.0:*
    1607/xl2tpd

There are no firewalls setup anywhere on my network for the moment. I have
been able to get isc-dhcp-server to successfully allocate DHCP requests
just fine however, so I don't think it's anything broken with DHCP in
general. I'm running Linux kernel 5.6.2 and using dnsmasq from Debian
Bullseye.

Hopefully someone can work out my issue!
Thank you very much!
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/attachments/20200414/e8b440df/attachment.html>