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script to change mac adress on eth0 and wlan0

Here you can exchange scripts that you created or have permission to share with other users.
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GDixon
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Posts: 358
Joined: Fri Nov 02, 2007 4:39 pm

script to change mac adress on eth0 and wlan0

#1 Post by GDixon » Fri Oct 17, 2014 2:18 pm

This is a handy way to change the mac adress on the ethernet and wireless cards.
you will need macchanger from the debian repo so install it and take a look at the --help
Macchanger can do a lot but right now I only included -r or random chnging, more will come if others like this.

Network manager will change the mac back to the firmware mac so change it before connecting.


this is for a desktop icon to execute the script, I just place it in /usr/local/bin with all my scripts and then copy it to my desktop. One click to execute.

Remember to make both executable and have fun

Code: Select all

[Desktop Entry]

Version=0.0.1

Name=Cange Mac's

Comment=Changes both network cards Mac's

Exec=/usr/local/bin/changemac

Icon=/usr/share/icons/mconfig.png

Terminal=true

Type=Application

Categories=Applications;Utilities;
This is the main script and i called it changemac

Code: Select all

#!/bin/bash

# You need to install macchanger from the debian repo to use this 
# script to change the mac address of the ethernet and/or wireless cards

# currently as written it will change both at the same time, in the
# near future it will have a menu to choose one or all


# This is to check if your root/superuser and if not prompts you for root's password

if [ $(id -u) != "0" ]; then
/usr/bin/clear
    echo
    echo -e "You must be root/superuser to run this script $USER\n" >&2

# su -c ''  will give a root password prompt for this sesion and then close root when you quit the script

su -c '/usr/local/bin/changemac'

    exit 1
fi

# used to change MAC Address on both cards to random mac's

clear
echo -e "Changing Eth0 cat5 mac address\n"
ifconfig eth0 down
macchanger -r eth0
ifconfig eth0 up
echo
echo -e "\n"
echo -e "Changing wlan0 wireless mac address\n"
ifconfig wlan0 down
macchanger -r wlan0
ifconfig wlan0 up
echo -e "\n"
echo -e "eth0 cat5 and wlan0 wireless mac's are changed\n"
sleep 10
exit 0

User avatar
Jerry3904
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Posts: 21947
Joined: Wed Jul 19, 2006 6:13 am

Re: script to change mac adress on eth0 and wlan0

#2 Post by Jerry3904 » Fri Oct 17, 2014 6:52 pm

I like the way you comment the script sections, it helps me follow what you are doing.
Production: 4.15.0-1-amd64, MX-17.1, AMD FX-4130 Quad-Core, GeForce GT 630/PCIe/SSE2, 8 GB, Kingston SSD 120 GB and WesternDigital 1TB
Testing: AAO 722: 4.15.0-1-386. MX-17.1, AMD C-60 APU, 4 GB

User avatar
GDixon
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Posts: 358
Joined: Fri Nov 02, 2007 4:39 pm

Re: script to change mac adress on eth0 and wlan0

#3 Post by GDixon » Fri Oct 17, 2014 8:26 pm

The comments keep me from forgetting what i was thinking and makes changes easier.
Heres a small update.
macchanger is capable of more, i'll add to this as time permits and anyone else finds it useful.

fixed a spelling oops

Code: Select all

[Desktop Entry]
Categories=Applications;Utilities;
Comment[en_US]=Changes both network cards Mac's
Comment=Changes both network cards Mac's
Exec=/usr/local/bin/changemac
GenericName[en_US]=
GenericName=
Icon=/usr/share/icons/mconfig.png
MimeType=
Name[en_US]=Change Mac's
Name=Change Mac's
Path=
StartupNotify=true
Terminal=true
TerminalOptions=
Type=Application
Version=0.0.1
X-DBUS-ServiceName=
X-DBUS-StartupType=
X-KDE-SubstituteUID=false
X-KDE-Username=
Added a menu like in the wol and trim scripts

Code: Select all

#!/bin/bash

# You need to install macchanger from the debian repo to use this 
# script to change the mac address of the ethernet and/or wireless cards


# This is to check if your root/superuser and if not prompts you for root's password

if [ $(id -u) != "0" ]; then
/usr/bin/clear
    echo
    echo -e "You must be root/superuser to run this script $USER\n" >&2

# su -c ''  will give a root password prompt for this sesion and then close root
# when you quit the script or the script is done

su -c '/usr/local/bin/changemac'

    exit 1
fi

# definition of menu

# eth0               added as 1
# wlan0              added as 2
# All                added as a or A
# Quit               added as q or Q

# Variables that can be changed to match system

name=Greg   # insert name of script user you would like to use

# clear the terminal to start fresh

/usr/bin/clear

while [ "$input1" != quit ]; do
    echo
    echo -e "Which network card would you like to change $name?\n"

# These are menu choice descriptions below

    echo -e "1) Change mac on eth0\n"
    echo -e "2) Change mac on wlan0\n"
    echo -e "a) Change mac on both\n"
    echo -e "q) quit and take no further action\n"
    echo -e "Waiting on your choice $name\n"

# to change one at a time

# eth0 cat 5

read input1
if [ $input1 == 1 ]; then
/usr/bin/clear
    echo
    echo -e "Changing Eth0 cat5 mac address $name\n"
  ifconfig eth0 down; macchanger -r eth0; ifconfig eth0 up
echo -e "\n"
echo -e "eth0 cat5 mac is changed\n"
sleep 8; /usr/bin/clear; /usr/local/bin/changemac
exit 1
fi

# wlan0 wireless

if [ $input1 == 2 ]; then
/usr/bin/clear
    echo
    echo -e "Changing wlan0 wireless mac address $name\n"
  ifconfig wlan0 down; macchanger -r wlan0; ifconfig wlan0 up
echo -e "\n"
echo -e "wlan0 wireless mac is changed\n"
sleep 8; /usr/bin/clear; /usr/local/bin/changemac
exit 1
fi

# used to change MAC Address on both cards to random mac's

if [ $input1 == A ] || [ $input1 == a ]; then
/usr/bin/clear

clear
echo -e "Changing Eth0 cat5 mac address\n"

ifconfig eth0 down; macchanger -r eth0; ifconfig eth0 up

echo
echo -e "\n"
echo -e "Changing wlan0 wireless mac address\n"

ifconfig wlan0 down; macchanger -r wlan0; ifconfig wlan0 up

echo -e "\n"
echo -e "eth0 cat5 and wlan0 wireless mac's are changed\n"

# uncomment one line below to go back to script 
# menu after choosing all

#sleep 12; /usr/bin/clear; /usr/local/bin/changemac

# If one lineabove is used to go back to script
# menu then comment out 4 lines below
 
# these 4 lines below will exit script when all
# is chosen

sleep 12; clear
echo
echo -e "Later gator!\n"
sleep 2; clear

exit 1
fi

if [ $input1 == Q ] || [ $input1 == q ]; then
/usr/bin/clear
    echo
    echo -e "later gator!\n"
sleep 2; /usr/bin/clear 
   
exit 1
fi

    done

I'm working on packing these into deb with debreate. fun fun fun learnming so far.

User avatar
Jerry3904
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Posts: 21947
Joined: Wed Jul 19, 2006 6:13 am

Re: script to change mac adress on eth0 and wlan0

#4 Post by Jerry3904 » Sat Oct 18, 2014 1:06 am

Here's a basic question: in what situation would I ever want to use this?
Production: 4.15.0-1-amd64, MX-17.1, AMD FX-4130 Quad-Core, GeForce GT 630/PCIe/SSE2, 8 GB, Kingston SSD 120 GB and WesternDigital 1TB
Testing: AAO 722: 4.15.0-1-386. MX-17.1, AMD C-60 APU, 4 GB

User avatar
GDixon
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Forum Regular
Posts: 358
Joined: Fri Nov 02, 2007 4:39 pm

Re: script to change mac adress on eth0 and wlan0

#5 Post by GDixon » Sat Oct 18, 2014 10:30 am

I use it at Dunkin Donuts, cafes, Mcdonalds and free wifi spots to change the mac and get a new ip address. Sometimes you get throttled and a refresh with a new ip works wonders.

Also it's used to change a mac when downloading with a p2p site. It's weak masking but it's deniable plausibility.

Lastly it's been interesting and a learning curve with scripts, I have some of the simple script commands down ok and it's time to make things a bit more complicated finding better ways with more things in scripting.

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