Hello, I'm trying to make *dnsmasq* work on my Debian Virtualbox guest but I keep getting reply from my VBox host DHCP first.
I have configured bridge ( br0 ) using openvswitch: $ ovs-vsctl show > cbda5c6b-c9ba-4fb4-8143-a1f0683e1e96 > Manager "ptcp:6640" > Bridge "br0" > Port "eth0" > Interface "eth0" > Port "vport1" > Interface "vport1" > Port "br0" > Interface "br0" > type: internal > ovs_version: "2.4.0" And have *dnsmasq* running on *br0* I have also removed configuration from *eth0* *ifconfig eth0 0 *and set default gateway to b*r0* *route add default gateway 192.168.1.129* > $ route -n > Kernel IP routing table > Destination Gateway Genmask Flags Metric Ref Use > Iface > 0.0.0.0 192.168.1.129 0.0.0.0 UG 0 0 0 br0 > 172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 > docker0 > 192.168.1.128 0.0.0.0 255.255.255.128 U 0 0 0 br0 > 192.168.56.0 0.0.0.0 255.255.255.0 U 0 0 0 > eth1 But when I'm running *nmap --script broadcast-dhcp-discover -e br0* the tdpdump process show response/OFFER from VBox DHCP comes first. *tcpdump -i br0 -nev udp port 68* > tcpdump: listening on br0, link-type EN10MB (Ethernet), capture size > 262144 bytes > 01:29:51.031925 08:00:27:b6:c1:90 > ff:ff:ff:ff:ff:ff, ethertype IPv4 > (0x0800), length 355: (tos 0x0, ttl 64, id 23681, offset 0, flags [DF], > proto UDP (17), length 341) > 192.168.1.129.68 > 255.255.255.255.67: BOOTP/DHCP, Request from > de:ad:c0:de:ca:fe, length 313, xid 0x514a3f0c, Flags [Broadcast] > Client-Ethernet-Address de:ad:c0:de:ca:fe > Vendor-rfc1048 Extensions > Magic Cookie 0x63825363 > DHCP-Message Option 53, length 1: Discover > Parameter-Request Option 55, length 61: > Subnet-Mask, Time-Zone, Default-Gateway, Time-Server > IEN-Name-Server, Domain-Name-Server, LOG, CS > LPR-Server, IM, RL, Hostname > BS, DP, Domain-Name, SS > RP, EP, IPF, SRT > PF, RSZ, TTL, MTU-Timeout > MTU-Table, MTU, LSN, BR > MD, MS, Router-Discovery, RSA > Static-Route, UT, AT, IE > TT, KI, KG, YD > YS, NTP, Vendor-Option, Netbios-Name-Server > WDD, Netbios-Node, Netbios-Scope, XFS > XDM, Requested-IP, Lease-Time, OO > DHCP-Message, Server-ID, Parameter-Request, MSG > MSZ, RN, RB, Vendor-Class > Client-ID > Lease-Time Option 51, length 4: 1 > 01:29:51.034866 52:54:00:12:35:02 > ff:ff:ff:ff:ff:ff, ethertype IPv4 > (0x0800), length 590: (tos 0x10, ttl 64, id 1, offset 0, flags [none], > proto UDP (17), length 576) > 10.0.2.2.67 > 255.255.255.255.68: BOOTP/DHCP, Reply, length 548, xid > 0x514a3f0c, Flags [Broadcast] > Your-IP 10.0.2.15 > Server-IP 10.0.2.4 > Client-Ethernet-Address de:ad:c0:de:ca:fe > file "debian8.pxe" > Vendor-rfc1048 Extensions > Magic Cookie 0x63825363 > DHCP-Message Option 53, length 1: Offer > Subnet-Mask Option 1, length 4: 255.255.255.0 > Default-Gateway Option 3, length 4: 10.0.2.2 > Domain-Name-Server Option 6, length 8: 192.168.1.1,192.168.1.1 > Domain-Name Option 15, length 4: "home" > Lease-Time Option 51, length 4: 86400 > Server-ID Option 54, length 4: 10.0.2.2 > 01:29:54.031972 08:00:27:b6:c1:90 > ff:ff:ff:ff:ff:ff, ethertype IPv4 > (0x0800), length 347: (tos 0xc0, ttl 64, id 24077, offset 0, flags [none], > proto UDP (17), length 333) > 192.168.1.129.67 > 255.255.255.255.68: BOOTP/DHCP, Reply, length 305, > xid 0x514a3f0c, Flags [Broadcast] > Your-IP 192.168.1.176 > Server-IP 192.168.1.129 > Client-Ethernet-Address de:ad:c0:de:ca:fe > Vendor-rfc1048 Extensions > Magic Cookie 0x63825363 > DHCP-Message Option 53, length 1: Offer > Server-ID Option 54, length 4: 192.168.1.129 > Lease-Time Option 51, length 4: 120 > RN Option 58, length 4: 60 > RB Option 59, length 4: 105 > Subnet-Mask Option 1, length 4: 255.255.255.128 > BR Option 28, length 4: 192.168.1.255 > Domain-Name-Server Option 6, length 4: 192.168.1.129 > Domain-Name Option 15, length 11: "mydomain.io" > Default-Gateway Option 3, length 4: 192.168.1.129 What did I do wrong? ~Thanks My dnsmasq.conf file: > interface=br0 > domain-needed > bogus-priv > no-resolv > local=/mydomain.io/ > no-poll > no-hosts > domain=mydomain.io > dhcp-range=192.168.1.129,192.168.1.254,255.255.255.128,192.168.1.255,12h > dhcp-option=3,192.168.1.129 > log-queries > log-dhcp > dhcp-authoritative
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