[Dnsmasq-discuss] dhcp clients not recieving acks

[Wesley Connor]

howdy folks

i have what i believe is a common problem, but im damned if i can figure  
out how to fix it

i have a 2 day old install of openbsd 4.1 running the latest pkg version  
of dnsmasq which is 2.31

i have dnsmasq setup doing dns and dhcp on my server and the dns is  
working fine

but when clients request a dhcp lease, on the server i get

dnsmasq[30314]: DHCPDISCOVER(fxp0) 192.168.101.15 00:0c:6e:66:##:##
dnsmasq[30314]: DHCPOFFER(fxp0) 192.168.101.15 00:0c:6e:66:##:##
dnsmasq[30314]: DHCPDISCOVER(fxp0) 192.168.101.15 00:0c:6e:66:##:##
dnsmasq[30314]: DHCPOFFER(fxp0) 192.168.101.15 00:0c:6e:66:##:##
dnsmasq[30314]: DHCPDISCOVER(fxp0) 192.168.101.15 00:0c:6e:66:##:##
dnsmasq[30314]: DHCPOFFER(fxp0) 192.168.101.15 00:0c:6e:66:##:##

repeated about a dozen times

but no DHCPDACK's and the client eventually times out

now as i understand this is a broadcast/firewall filtering issue

my pf is setup to allow all in and all out and ive tried it with pf  
disabled

the if im listening on is setup as

inet 192.168.101.100 255.255.255.0 NONE

which gives it an ifconfig response of

fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
         lladdr 00:90:27:2e:##:##
         groups: egress
         media: Ethernet autoselect (100baseTX full-duplex)
         status: active
         inet6 fe80::290:27ff:fe2e:7fd6%fxp0 prefixlen 64 scopeid 0x1
         inet 192.168.101.100 netmask 0xffffff00 broadcast 192.168.101.255


my dnsmasq.conf contains
####
domain-needed
bogus-priv

filterwin2k

interface=fxp0

expand-hosts

domain=foo.org

dhcp-range=192.168.101.2,192.168.101.200,12h

dhcp-option=3,192.168.101.1    #mygateway

dhcp-authoritative

log-queries
###

am i missing something obvious?

as i said the dns is working fine

and the dhcp requests seem to be getting in and dnsmasq is offering an ip
the leases just arent 'getting out' or being picked up

and as in the other cases i have read, the standard dhcpd works fine but i  
understand that it works differently

any ideas?