VirtualBox

Opened 6 years ago

Last modified 6 years ago

#18184 new defect

arp fails when connecting to a wireless connection on host via bridged network — at Version 3

Reported by: lerdmann Owned by:
Component: network Version: VirtualBox 5.2.22
Keywords: arp wireless Cc:
Guest type: other Host type: Windows

Description (last modified by Valery Ushakov)

Host: Windows 10 Pro Guest: eCS 2.2 beta (drivers: all the latest and greatest)

From the guest, I am trying to connect to a wireless connection on the host. For sake of simplicity and performance I have set up "bridged network".

Sometimes but not always I have problems to access the net from the guest. When that happens, I see this (example) in the ARP table of the guest:

"arp -a":

ARP table contents:

interface   hardware address   IP address       minutes since last use
lan 0       (incomplete)       www.xxx.yyy.zzz  0

Apparently, the ARP request does not pass through. If I reboot the guest a couple of times AND if I actually use the wireless connection on the host, then eventually, I will be able to access the wireless connection from the guest. I have not observed this problem with a wired connection (on the host). This seems to always work ok.

Change History (3)

comment:1 by lerdmann, 6 years ago

Here we go again:

 "arp -a":

ARP table contents:

interface   hardware address    IP address          minutes since last use
lan0        (incomplete)        www.xxx.yyy.zzz     0 

comment:2 by Socratis, 6 years ago

  1. "(incomplete)" is not a valid MAC address and "www.xxx.yyy.zzz" is not a valid IP, that's why it fails!
    (joking of course ;) )
  1. It's a known issue. See comments 18 and 19, from ticket #10019: Unable to bridge Mac OS X AirPort connection. Actually read all the comments made by 'vushakov'.
  1. Bridged over wireless don't always play nice. Bridged networking is outside the WLAN specification. Bridging to wireless is not really bridging. The guest shares the MAC of the host and the host does a sort of MAC-NAT translation based on IP addresses. Promiscuous mode doesn't exist in the official WLAN specifications. It may or may not work.
  1. Some combinations of Routers/Access Points, WLAN cards and drivers work, some don't. See: Bridging & Wifi - Supported hardware and add your experience. For example, it works fine in my home, but not in my office. Same laptop, same VM, different router.
Last edited 6 years ago by Socratis (previous) (diff)

comment:3 by Valery Ushakov, 6 years ago

Description: modified (diff)
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