[Dnsmasq-discuss] Problem using dnsmasq as dhcp

[Archimede Pitagorico]

I am trying to migrate from dhcpd to dnsmasq for my home network, without much luck.

 

I use the following simple configuration file:

 

port=0

interface=lan
bind-interfaces

dhcp-authoritative
dhcp-range=192.168.69.32,192.168.69.95,2h
dhcp-option=option:router,192.168.69.1
dhcp-option=option:dns-server,192.168.69.1

log-dhcp

 

My lan interface is configured as follows:

 

6: lan: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 00:c0:ca:89:35:9c brd ff:ff:ff:ff:ff:ff
    inet 192.168.69.1/24 scope global lan
       valid_lft forever preferred_lft forever
    inet 192.168.69.2/24 scope global secondary lan
       valid_lft forever preferred_lft forever
    inet6 fc00::c0a8:4502/120 scope global
       valid_lft forever preferred_lft forever
    inet6 fc00::c0a8:4501/120 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::7c2b:c1ff:fec3:674d/64 scope link
       valid_lft forever preferred_lft forever

 

in the log, when I start dnsmasq, I can see:

 

Jan 02 11:25:11 archimede systemd[1]: Starting A lightweight DHCP and caching DNS server: dhcp...
Jan 02 11:25:11 archimede dnsmasq[8253]: dnsmasq: syntax check OK.
Jan 02 11:25:11 archimede systemd[1]: Started A lightweight DHCP and caching DNS server: dhcp.
Jan 02 11:25:11 archimede dnsmasq[8255]: started, version 2.76 DNS disabled
Jan 02 11:25:11 archimede dnsmasq[8255]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conn
Jan 02 11:25:11 archimede dnsmasq-dhcp[8255]: DHCP, IP range 192.168.69.32 -- 192.168.69.95, lease time 2h
Jan 02 11:25:11 archimede dnsmasq-dhcp[8255]: DHCP, sockets bound exclusively to interface lan

 

and nestat shows dnsmasq listening on UDP 0.0.0.0 port 67.

 

However it does not work. Using tcpdump, I can see incoming dhcp lease requests from clients, but there is no server response. I know the tcpdump command I am using is correct, because if I switch back to dhcpcd, I can see both dhcp client requests and server replies.

 

What did I miss? Thanks

 

 

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