12-23-2015
Virtualbox guest as a firewall for lUbuntu host
Using virtualbox, I am trying to use Alpine linux (guest) as a firewall for my lubuntu (host). My physical network card (NIC) is eth0.
ISP WAN -> Alpine linux (guest) -> lubuntu (host) LAN
I am trying to get the ip from my ISP DHCP server but I had no success. I know that in virtualbox I have to use bridged adapter in eth0.
But in AlpineLinux (guest) do I have to create a vlan? Thats where I get confused.
ISP WAN -> DHCP -> Alpine linux (guest)
I was able to do this with two PCs like this:
ISP WAN --> Alpine linux firewall (PC1) --> Lubuntu LAN (PC2)
But now I am trying to do it with just one PC using virtualbox like this:
ISP WAN --> Alpine linux firewall (PC1) (Guest) --> Lubuntu LAN (PC1) (Host)
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LEARN ABOUT XFREE86
cirrus
CIRRUS(4) Kernel Interfaces Manual CIRRUS(4)
NAME
cirrus - Cirrus Logic video driver
SYNOPSIS
Section "Device"
Identifier "devname"
Driver "cirrus"
...
EndSection
DESCRIPTION
cirrus is an XFree86 driver for Cirrus Logic video chips. The driver provides support for the following framebuffer depths: 8, 15, 16, 24,
32 bpp. The cirrus_alpine module also supports 1 and 4 bpp. Conversion of 32 bpp to 24 bpp is supported and preferred.
Interlace is not supported. DGA is supported. RAMDAC speed may be specified.
SUPPORTED HARDWARE
The cirrus driver supports several chipsets through two automatically loaded modules.
CL-GD546x support is in the cirrus_laguna module:
CL-GD5462
CL-GD5464
CL-GD5464BD
CL-GD5465
cirrus_alpine module:
CL-GD5430
CL-GD5434-4
CL-GD5434-8
CL-GD5436
CL-GD5446
CL-GD5480
CL-GD7548
CL-GD7555
CL-GD7556
CONFIGURATION DETAILS
Please refer to XF86Config(5) for general configuration details. This section only covers configuration details specific to this driver.
The following driver Options are supported:
cirrus_laguna module:
ChipRev HWcursor NoAccel Rotate ShadowFB
cirrus_alpine module:
ChipRev HWcursor MemCFG1 MemCFG2 MMIO NoAccel Rotate ShadowFB
VideoRam
If VideoRam is specified, that setting is respected and memory is not probed.
Option "Clocks"
Clocks line may not be specified for Cirrus chips.
Option "HWCursor" "boolean"
Enable or disable the HW cursor. Hardware cursor sizes of 32 and 64 are supported in the "Alpine" module. Hardware cursor size of
64 is supported in the "Laguna" module. Default: on for 7548, 7555/6; otherwise off.
Option "MemCFG1" "integer"
Option "MemCFG2" "integer"
May configure memory on non-primary cards. "Alpine" module does not yet know how to configure memory. Use options MemCFG1 and Mem-
CFG2 to set registers SR0F and SR17 before trying to count ram size. The 754x supports MMIO for the BitBlt engine but not for the
VGA registers. The 754x may have difficulty with 2 256K X 16 DRAMs(1024) or 4 512K X 8 DRAMs(2048). The 7555/6 assumes 2048.
Default: memory automatically detected.
Option "MMIO" "boolean"
By default, MMIO is used if we have a separate IOAddress and not in monochrome mode (1 bpp). When MMIO is not used, RAC IO flags
RAC_COLORMAP, RAC_CURSOR, RAC_VIEWPORT, and RAC_FB are set. Default: on
Option "NoAccel" "boolean"
Disable or enable acceleration. Acceleration can not be used in less than 8 bpp. Default: Acceleration disabled for 5436, 5480,
7548; otherwise enabled.
Option "PciRetry" "boolean"
Enable or disable PCI retries. Default: off.
Option "Rotate" "CW"
Option "Rotate" "CCW"
Rotate the display clockwise or counterclockwise. This mode is unaccelerated. This mode forces use of the shadow framebuffer
layer. Screen depth must be less than 8 bpp with "Alpine" module. HW cursor is disabled with Rotate. Default: no rotation.
Option "ShadowFB" "boolean"
Enable or disable use of the shadow framebuffer layer. This mode is unaccelerated. Screen depth must be less than 8 bpp with
"Alpine" module. Default: off.
SEE ALSO
XFree86(1), XF86Config(5), xf86config(1), Xserver(1), X(7)
AUTHORS
Authors of this document include: Scot Wilcoxon (Scot@Wilcoxon.org), authors of mga(4x).
XFree86 Version 4.7.0 CIRRUS(4)