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Ticket Resolution Summary Owner Reporter
#2722 worksforme Sun xVm hangs when spawning davefilms.us@gmail.com
Description

I have the version 2.0.2 and it just does nothing.

Unbuntu 8.04 x86 AMD Sempron 2gighz

#8395 obsolete OSX host networking UDP odd behaviour when VirtualBox VM running Dave Hill
Description

Setup:

OSX host (10.5.8) connected to network via en0, IP address 192.168.5.2
Linux Guest (Centos 5.5 32bit) using bridged networking, IP address 192.168.5.3

Host also runs "bind" caching name server.

When guest is running, *some* DNS queries (either from the guest or from other machines in the network) fail with "timed out". When guest is not running, all is OK.

It doesn't matter if the guest is actually booted (I interrupted the boot at the GRUB screen), the problem is still there.

example from another OSX laptop on the network, querying the DNS server on the OSX VB host:

dhcp102:~ dave$ host mx1.cmail3.com 192.168.5.2
;; connection timed out; no servers could be reached
dhcp102:~ dave$ 

but if I query my other (old) DNS server then it works:

dhcp102:~ dave$ host mx1.cmail3.com 192.168.5.5
Using domain server:
Name: 192.168.5.5
Address: 192.168.5.5#53
Aliases: 

mx1.cmail3.com has address 206.72.127.155
mx1.cmail3.com has address 206.72.127.149
dhcp102:~ dave$ 

and if I query for something else on either DNS server it works!

dhcp102:~ dave$ host mx2.cmail3.com 192.168.5.2
Using domain server:
Name: 192.168.5.2
Address: 192.168.5.2#53
Aliases: 

mx2.cmail3.com has address 206.72.127.216
dhcp102:~ dave$ host mx2.cmail3.com 192.168.5.5
Using domain server:
Name: 192.168.5.5
Address: 192.168.5.5#53
Aliases: 

mx2.cmail3.com has address 206.72.127.216
dhcp102:~ dave$ 

So it depends on the size of the packets.

Running a packet capture from both ends shows that it all *looks* OK, until you enable "calculate checksums" for UDP in Wireshark, then it shows that the UDP checksum is wrong on the packets that "go missing".

When the problem occurs, the following message is logged on the OSX host console log:

Feb 21 22:52:57 henry kernel[0]: in_delayed_cksum_offset: ip_len 49408 (193) doesn't match actual length 207
#2656 obsolete Screen formatitng problem after exiting FDisk DOS 6.22 Dave
Description

Windows XP-Home host. Created a VBox for DOS to later install win3.1. Using MS-DOS 6.22 FDisk I created an active Primary DOS partition using all of the 1G space and exit FDisk. Screen dropped to what looked like 240 x 320 big grainy characters. All text and commands from then on were only at the top line of the screen. It appears no CR or LF were being issued. Also CLS did not CLear Screen.

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