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I am trying to configure my Linux guest for Bridged networking as I want to allow other users access to a development machine. I am reasonably technically competent but not really a Linux admin or network specialist.

I have configured the machine with a single network adapter (for now to keep things simple).

This is configured as : Bridged Adapter, en0 WiFi (AirPort), PCnet-FAST III [Although I have tried the Intel Pro MT adapter too), Promiscuous mode disabled.

Within Linux I have an adapter (eth12) configured as a Wired adapter.
802.1x Security is not used, IPv6 is Ignored, IPv4 is set to automatic DHCP, Required IP4 Addressing for connection to complete is checked and I have entered a DHCP client ID.
I have tried entering the MAC address shown in virtual box as the Device MAC address and/or the Cloned MAC address.

This configuration worked for me from my home office last night. It does not work from my clients network today even though I have a good wifi connection.

Am I missing something basic here?
I did not think I needed to configure anything for wifi security as the guest treats this as a wired connection right?

I think this section of the /var/logs/messages file shows DHCP timeouts:

Code: Select all

Oct  2 05:02:56 oracle2go NetworkManager[1313]: <info> (eth12): DHCPv4 state changed nbi -> preinit
Oct  2 05:02:56 oracle2go dhclient[3308]: Listening on LPF/eth12/08:00:27:aa:67:ed
Oct  2 05:02:56 oracle2go dhclient[3308]: Sending on   LPF/eth12/08:00:27:aa:67:ed
Oct  2 05:02:56 oracle2go dhclient[3308]: Sending on   Socket/fallback
Oct  2 05:03:00 oracle2go dhclient[3308]: DHCPREQUEST on eth12 to 255.255.255.255 port 67 (xid=0x6f097305)
Oct  2 05:03:08 oracle2go dhclient[3308]: DHCPREQUEST on eth12 to 255.255.255.255 port 67 (xid=0x6f097305)
Oct  2 05:03:22 oracle2go dhclient[3308]: DHCPDISCOVER on eth12 to 255.255.255.255 port 67 interval 8 (xid=0x6e88e16b)
Oct  2 05:03:30 oracle2go dhclient[3308]: DHCPDISCOVER on eth12 to 255.255.255.255 port 67 interval 14 (xid=0x6e88e16b)
Oct  2 05:03:41 oracle2go NetworkManager[1313]: <warn> (eth12): DHCPv4 request timed out.
Oct  2 05:03:41 oracle2go NetworkManager[1313]: <info> (eth12): canceled DHCP transaction, DHCP client pid 3308
Oct  2 05:03:41 oracle2go NetworkManager[1313]: <info> Activation (eth12) Stage 4 of 5 (IP4 Configure Timeout) scheduled...
Oct  2 05:03:41 oracle2go NetworkManager[1313]: <info> Activation (eth12) Stage 4 of 5 (IP4 Configure Timeout) started...
Oct  2 05:03:41 oracle2go NetworkManager[1313]: <info> (eth12): device state change: 7 -> 9 (reason 5)
Oct  2 05:03:41 oracle2go NetworkManager[1313]: <info> Marking connection 'System eth0' invalid.
Oct  2 05:03:41 oracle2go NetworkManager[1313]: <warn> Activation (eth12) failed.
Oct  2 05:03:41 oracle2go NetworkManager[1313]: <info> Activation (eth12) Stage 4 of 5 (IP4 Configure Timeout) complete.
Oct  2 05:03:41 oracle2go NetworkManager[1313]: <info> (eth12): device state change: 9 -> 3 (reason 0)
Oct  2 05:03:41 oracle2go NetworkManager[1313]: <info> (eth12): deactivating device (reason: 0).

Wifi links are not meant for multi-access, they are meant to be P2P connections, bridging on top of them always have been a 50/50 chance to work.
Try with a wired connection from the host first and see if you have any improvement.

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Bridged Network Configuration Help (Guest : Oracle Linux)

Bridged Network Configuration Help (Guest : Oracle Linux)

Re: Bridged Network Configuration Help (Guest : Oracle Linux

Re: Bridged Network Configuration Help (Guest : Oracle Linux