Solved (kinda): Peculiar issue with Bridge Adapter Mode
Posted: 28. Oct 2016, 12:12
I am trying to configure a Debian Stretch guest on Virtualbox 5.1.8 in a Kubuntu 16.04 host, and I am having several problems.
The compilation of http://download.virtualbox.org/virtualb ... _amd64.deb proceeds
correctly, and there are no errors reported, nor inside /var/log/vbox-install.log. The following modules appear loaded,
and I could find no errors relating to VB within /var/log.
And yet, network connections work properly only if I choose NAT, or Bridge Adapter with the paravirtualized interface. When I choose
Bridge Adapter with any of the other Adapter Types, connections fail in a peculiar way: from within the guest, I can easily ping and
resolve IP addresses, but standard TCP connections (I did not try UDP) suddenly stop after exchanging a few packets. Loading any Web
page stops immediately, and even LAN connections have problems: I can ssh into a local host, and I can do all sorts of things provided
input and output are short, but, if I just do so much as a ls, the connection freezes. Simultaneous analysis of the packet
flow with tcpdump shows that, after an initial flurry, very few packets are exchanged.
The log file is here,
http://paste.ubuntu.com/23392132/
or here,
The compilation of http://download.virtualbox.org/virtualb ... _amd64.deb proceeds
correctly, and there are no errors reported, nor inside /var/log/vbox-install.log. The following modules appear loaded,
Code: Select all
# lsmod | grep -i vb
vboxpci 24576 0
vboxnetadp 28672 0
vboxnetflt 28672 1
vboxdrv 454656 4 vboxnetadp,vboxnetflt,vboxpci
And yet, network connections work properly only if I choose NAT, or Bridge Adapter with the paravirtualized interface. When I choose
Bridge Adapter with any of the other Adapter Types, connections fail in a peculiar way: from within the guest, I can easily ping and
resolve IP addresses, but standard TCP connections (I did not try UDP) suddenly stop after exchanging a few packets. Loading any Web
page stops immediately, and even LAN connections have problems: I can ssh into a local host, and I can do all sorts of things provided
input and output are short, but, if I just do so much as a ls, the connection freezes. Simultaneous analysis of the packet
flow with tcpdump shows that, after an initial flurry, very few packets are exchanged.
The log file is here,
http://paste.ubuntu.com/23392132/
or here,