Common kernel configs

Android USB Tethering

below info modified from [1]

Required menuconfig prompts/settings according to gentoo wiki and my own configs:

Device Drivers --->
  [*] Network device support --->
      USB Network Adapters --->
           <M> Multi-purpose USB Networking Framework
              -M-   CDC Ethernet support (smart devices such as cable modems)
              <M> CDC EEM support
              <M> Host for RNDIS and ActiveSync devices (EXPERIMENTAL)
              <M> Simple USB Network Links (CDC Ethernet subset)
                 [*] Embedded ARM Linux links

note ***

The prompts above frequently change from one kernel version to the next. The above settings were noted as of kernel version 3.8.3-gentoo-r1.

corresponding .config parameters spawned from above settings:

CONFIG_NETDEVICES=y
CONFIG_USB_USBNET=m
CONFIG_USB_NET_CDCETHER=m
CONFIG_USB_NET_CDC_EEM=m
CONFIG_USB_NET_RNDIS_HOST=m
CONFIG_USB_NET_CDC_SUBSET=m
CONFIG_USB_ARMLINUX=y

check config command run against your kernel config file to verify settings

cat .config | grep -E "NETDEVICES|USB_USBNET|USB_NET_CDC_SUBSET|USB_NET_CDCETHER|USB_NET_CDC_EEM|NET_RNDIS_HOST|USB_ARMLINUX"

iptables

-*- Networking support  --->
      Networking options  --->
       [*] Network packet filtering framework (Netfilter)  --->
          Core Netfilter Configuration  --->
               [*] Netfilter connection tracking support
               -*- Netfilter Xtables support (required for ip_tables)
               [*]   "conntrack" connection tracking match support  
               [*]   "state" match support
          IP: Netfilter Configuration  --->
               [*] IPv4 connection tracking support (required for NAT)
               [*] IP tables support (required for filtering/masq/NAT)
               [*]   Packet filtering

input devices

uinput -> Device Drivers

 -> Input device support 
   -> Generic input layer 
      -> Miscellaneous devices
          <M> User level driver support

cameras and video 4 linux

Device Drivers >
 --- Multimedia support --->
          <*> Video For Linux
          [*]   Cameras/video grabbers support
          [*]   V4L platform devices  --->
          [*]   Media USB Adapters  --->

crypto / dev mapper stuff

Device Drivers —>

Multi-device support (RAID and LVM)  —>
[*] Multiple devices driver support (RAID and LVM)
< >   RAID support
<*>  Device mapper support
<*>  Crypt target support

File Systems —>

<*>  The Extended 4 (ext4) filesystem

Cryptographic API —>

<*>  SHA256 digest algorithm
<*>  AES cipher algorithms

.config

CONFIG_MD=y
CONFIG_BLK_DEV_MD=y
CONFIG_MD_AUTODETECT=y
CONFIG_BLK_DEV_DM=y
CONFIG_DM_CRYPT=y
CONFIG_DM_SNAPSHOT=y
CONFIG_BLK_DEV_CRYPTOLOOP=y
CONFIG_CRYPTO=y
CONFIG_CRYPTO_AES=y
CONFIG_CRYPTO_AES_X86_64=m
CONFIG_CRYPTO_SHA256=m
CONFIG_CRYPTO_SHA512=y

USB to Serial

Symbol: USB_SERIAL_PL2303 [=m] │

 │ Type  : tristate                                                                                                            │  
 │ Prompt: USB Prolific 2303 Single Port Serial Driver                                                                         │  
 │   Defined at drivers/usb/serial/Kconfig:480                                                                                 │  
 │   Depends on: USB_SUPPORT [=y] && USB_SERIAL [=y]                                                                           │  
 │   Location:                                                                                                                 │  
 │     -> Device Drivers                                                                                                       │  
 │       -> USB support (USB_SUPPORT [=y])                                                                                     │  
 │ (1)     -> USB Serial Converter support (USB_SERIAL [=y])