Hi

A picture speaks a 1000 words so here is my picture of what I am trying to achieve, Is it possible ? See attached picture.



I am able to ping my Guest's Hostonly adapter IP address when my host Ubuntu does not have a IP to it, however when I try to give it an IP using DHCP I lose the ability to ping my VirtualBox guest's hostonly IP address.

When host ubuntu does not have IP
bala@bala-laptop:~$ ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:12:de:cd:b0:af
inet6 addr: fe80::bbbb:aaaa:fe18:a94f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:151981 errors:0 dropped:0 overruns:0 frame:0
TX packets:110240 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:192523623 (192.5 MB) TX bytes:13485268 (13.4 MB)
Interrupt:16
bala@bala-laptop:~$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.56.0 * 255.255.255.0 U 0 0 0 vboxnet0
bala@bala-laptop:~$ ping 192.168.56.101
PING 192.168.56.101 (192.168.56.101) 56(84) bytes of data.
64 bytes from 192.168.56.101: icmp_seq=6 ttl=64 time=11.1 ms
64 bytes from 192.168.56.101: icmp_seq=7 ttl=64 time=0.716 ms
64 bytes from 192.168.56.101: icmp_seq=8 ttl=64 time=0.661 ms
64 bytes from 192.168.56.101: icmp_seq=9 ttl=64 time=0.759 ms
64 bytes from 192.168.56.101: icmp_seq=10 ttl=64 time=0.617 ms

When host ubuntu does have IP

bala@bala-laptop:~$ ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:12:de:cd:b0:af
inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::bbbb:aaaa:fe18:a94f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:151948 errors:0 dropped:0 overruns:0 frame:0
TX packets:110207 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:192517638 (192.5 MB) TX bytes:13479549 (13.4 MB)
Interrupt:16
bala@bala-laptop:~$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 * 255.255.255.0 U 1 0 0 eth0
192.168.56.0 * 255.255.255.0 U 0 0 0 vboxnet0
link-local * 255.255.0.0 U 1000 0 0 eth0
default 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
bala@bala-laptop:~$ ping 192.168.56.101
PING 192.168.56.101 (192.168.56.101) 56(84) bytes of data.
ping: sendmsg: Operation not permitted
ping: sendmsg: Operation not permitted
ping: sendmsg: Operation not permitted

Is there any way by which I can get an IP to my host interface and still be able to ping my Guest OS's host only interface?

Attached Thumbnails

 

I have shown my problem in video format for better understanding. I don't see a way to attach an AVI file so giving the link here. I hope it does not violate the forum rules, if it does let me know I will remove it immediately.

http://www.youtube.com/watch?v=eQheXEfN1PE

Disabled Firestarter on base OS it fixed the issue. However I don't want my firewall to be completely down, I tried adding 192.168.56.0/24 to the allowed list. Still I am unable to ping. Any pointers as to what I should do ?