id summary reporter owner description type status component version resolution keywords cc guest host 945 VM can send but not receive traffic through TAP interface Azzie "Test procedure: 1. Host (Linux 2.6.23.9) is connected to LAN through eth0[[BR]] 2. eth0 is bridged with vbox0 (TAP)[[BR]] 3. I boot the VM and choose to boot from LAN[[BR]] Observations: 1. On the host {{{ overlord linux # tcpdump -i vbox0 tcpdump: WARNING: vbox0: no IPv4 address assigned tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on vbox0, link-type EN10MB (Ethernet), capture size 96 bytes 00:31:36.417877 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from 08:00:27:b5:a3:06 (oui Unknown), length 548 00:31:36.431399 IP 192.168.0.1.bootps > 192.168.0.10.bootpc: BOOTP/DHCP, Reply, length 548 00:31:38.944662 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from 08:00:27:b5:a3:06 (oui Unknown), length 548 00:31:38.963307 IP 192.168.0.1.bootps > 192.168.0.10.bootpc: BOOTP/DHCP, Reply, length 548 00:31:43.723376 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from 08:00:27:b5:a3:06 (oui Unknown), length 548 00:31:43.743677 IP 192.168.0.1.bootps > 192.168.0.10.bootpc: BOOTP/DHCP, Reply, length 548 00:31:52.290219 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from 08:00:27:b5:a3:06 (oui Unknown), length 548 00:31:52.307821 IP 192.168.0.1.bootps > 192.168.0.10.bootpc: BOOTP/DHCP, Reply, length 548 00:32:08.273038 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from 08:00:27:b5:a3:06 (oui Unknown), length 548 00:32:08.284300 IP 192.168.0.1.bootps > 192.168.0.10.bootpc: BOOTP/DHCP, Reply, length 548 00:32:41.006979 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from 08:00:27:b5:a3:06 (oui Unknown), length 548 00:32:41.025565 IP 192.168.0.1.bootps > 192.168.0.10.bootpc: BOOTP/DHCP, Reply, length 548 }}} 2. The VM prints ""No IP.No IP.No IP.No IP.No IP.No IP."" The screenshot is attached. Interpretation: 1. The VM sends a DHCP request[[BR]] 2. The request is bridged, received by the DHCP server, responded and bridged again[[BR]] 3. The DHCP reply is sent over the TAP interface[[BR]] 4. The VM does not receive the response[[BR]] " defect closed network VirtualBox 1.5.2 fixed network tap azzie@… other other