Install oathtool.

sudo apt-get install oathtool libpam-oath

Generate a secret.

export HEX_SECRET=$(head -10 /dev/urandom | md5sum | cut -b 1-30)

Generate the TOTP details, 6 digits long.

oathtool --verbose --totp $HEX_SECRET

Enter the base32 secret in Android FreeOTP.

Create and populate the /etc/security/users.oath file.

sudo bash -c "echo HOTP/T30 $USER - $HEX_SECRET >> /etc/security/users.oath"
sudo chmod 0600 /etc/security/users.oath

Forget the secret!

unset HEX_SECRET

prefix /etc/pam.d/sshd with

auth sufficient pam_oath.so usersfile=/etc/security/users.oath window=10 digits=6

Allow this in sshd and restart.

sudo sed -Ei -e 's/(ChallengeResponseAuthentication) no/\1 yes/' /etc/ssh/sshd_config
sudo service ssh restart

Test with

ssh localhost

You should see:
One-time password (OATH) for `USER':

To avoid otp for some users prefix /etc/pam.d/sshd with

auth [success=1 default=ignore] pam_succeed_if.so user in user1:user2

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kio-mtp and mtp-detect stopped working

But jmtpfs seams to work - i decided to mount on usb plug in with an udev rule

#> apt-get install jmtpfs
#> mkdir -p /media/mtp

/etc/udev/rules.d/99-jmtpfs.rules

ACTION=="add", ENV{ID_MTP_DEVICE}=="1", RUN="/usr/bin/jmtpfs -o allow_other /media/mtp"
ACTION=="remove", ENV{ID_MTP_DEVICE}=="1", RUN="/bin/fusermount -u /media/mtp""

A little bit faster is simple-mtpfs, but you have to compile

apt-get install libusb-dev libmtp-dev

git clone https://github.com/phatina/simple-mtpfs.git
cd imple-mtpfs
./autogen.sh
mkdir build && cd build
../configure --prefix=/usr
make
sudo make install

/etc/udev/rules.d/99-simple-mtpfs.rules

ACTION=="add",ENV{ID_MTP_DEVICE}=="1",RUN="/usr/bin/simple-mtpfs -o allow_other /media/mtp"
ACTION=="remove", ENV{ID_MTP_DEVICE}=="1", RUN="/bin/fusermount -u /media/mtp""

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After plug in of a wifi usb stick linux act's as a hostap.

apt-get install isc-dhcp-server hostapd

changes in /etc/hostapd/hostapd.conf

interface=wlan0
driver=nl80211
ssid=MYSSID
country_code=AT
ieee80211d=1
hw_mode=g
channel=11
beacon_int=1000
dtim_period=20
ieee80211n=1
wpa=2
wpa_passphrase=MYPASSPHRASE
wpa_pairwise=TKIP CCMP

/etc/network/interfaces

iface wlan0 inet static
  address 192.168.9.1
  netmask 255.255.255.0
  hostapd /etc/hostapd/hostapd.conf
  up iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
  up /etc/init.d/isc-dhcp-server restart
  down iptables -t nat -D POSTROUTING -o eth0 -j MASQUERADE
  down killall hostapd

first check vendor and product id with lsusb:

/etc/udev/rules.d/local.rules

ACTION=="add", SUBSYSTEMS=="usb", ATTRS{idVendor}=="148f", ATTRS{idProduct}=="3070", \
                                                     RUN+="/sbin/ifup wlan0"
ACTION=="remove", SUBSYSTEM=="net", KERNEL=="wlan0", RUN+="/sbin/ifdown wlan0"

On booting this does not work for me so i started the hostap by

/etc/rc.local

lsusb | grep -q "148f:3070" && /sbin/ifup wlan0

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To minimize bandwidth for video streaming i have to transcode mjpeg to h264.
To do this on demand ffserver is no option for me.
Therefore a small cgi script on the webserver with ffmpeg did the trick:

#!/bin/bash

echo -e "Content-type: video/avi\n"

#ffmpeg -an -analyzeduration 0 -f mjpeg -r 8 -i http://IP_CAM:PORT \
#       -c:v libx264 -preset ultrafast -r 8 -threads 2 -b:v 150k -f avi - 2>/dev/null &

avconv -an -analyzeduration 0 -f mjpeg -r 8 -i http://IP_CAM:PORT \
       -c:v libx264 -pre ultrafast -r 8 -threads 2 -b:v 150k -f avi - 2>/dev/null &
pid=$!
trap "kill $pid" SIGTERM SIGPIPE
wait

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iptables -I FORWARD -i INTERFACE -p tcp --dport PORT -j ACCEPT
iptables -A PREROUTING -t nat -i INTERFACE -p tcp --dport PORT -j DNAT --to-destination LOCAL_IP


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