'ifconfig eth0 up' does not restore connection
(I am running Kali (Debian) on a VM.)
I had been experiencing problems with changing my computer's MAC address, as whenever i try:
root@kali:~# macchanger -r eth0
Current MAC: 08:00:27:3b:23:a1 (CADMUS COMPUTER SYSTEMS)
Permanent MAC: 08:00:27:3b:23:a1 (CADMUS COMPUTER SYSTEMS)
[ERROR] Could not change MAC: interface up or insufficient permissions: Device or resource busy.
I then fixed this by using the following commands:
sudo -i
ifconfig eth0 down
macchanger -r eth0
ifconfig eth0 up
Only, whenever i type the last command, ifconfig eth0 up , my connection is still lost. I cant connect to Internet, cant ping any servers or anything of the sort.
Edit: Using the Adapter Type 'Intel PRO/1000 MT Desktop' allows me to change my MAC address without having to use any other commands, however, when it is set that way, i also have no connection. (Which is why I am currently using the Adapter Type 'PCnet-FAST-III' attached to 'Bridged Adapter')
debian kali-linux
edited Dec 16 at 4:22
Rui F Ribeiro
38.9k1479129
asked Jul 21 '17 at 7:02
ark.pytm
1
add a comment |
(I am running Kali (Debian) on a VM.)
I had been experiencing problems with changing my computer's MAC address, as whenever i try:
root@kali:~# macchanger -r eth0
Current MAC: 08:00:27:3b:23:a1 (CADMUS COMPUTER SYSTEMS)
Permanent MAC: 08:00:27:3b:23:a1 (CADMUS COMPUTER SYSTEMS)
[ERROR] Could not change MAC: interface up or insufficient permissions: Device or resource busy.
I then fixed this by using the following commands:
sudo -i
ifconfig eth0 down
macchanger -r eth0
ifconfig eth0 up
Only, whenever i type the last command, ifconfig eth0 up , my connection is still lost. I cant connect to Internet, cant ping any servers or anything of the sort.
Edit: Using the Adapter Type 'Intel PRO/1000 MT Desktop' allows me to change my MAC address without having to use any other commands, however, when it is set that way, i also have no connection. (Which is why I am currently using the Adapter Type 'PCnet-FAST-III' attached to 'Bridged Adapter')
debian kali-linux
edited Dec 16 at 4:22
Rui F Ribeiro
38.9k1479129
asked Jul 21 '17 at 7:02
ark.pytm
1
Seems like you have to rundhclient -v -r eth0 && dhclient -v eth0
– Valentin Bajrami
Jul 21 '17 at 7:12
Given that this is stuff that is explicitly called out, with emphasis, in Arch doco, I am saddened to see that people think that this is an "unclear or not useful" question for a Debian user to ask.
– JdeBP
Jul 21 '17 at 8:05
often it takes a while for picking up the new MAC...
– Rui F Ribeiro
Jul 21 '17 at 8:43
runifconfig eth0to check if changes are aproved to interface, and ping your gateway ip to test if interface is working correctly.
– Krzysztof Stasiak
Jul 21 '17 at 9:39
trysystemctl restart networking
– Bob Johnson
Dec 16 at 6:29
add a comment |
(I am running Kali (Debian) on a VM.)
I had been experiencing problems with changing my computer's MAC address, as whenever i try:
root@kali:~# macchanger -r eth0
Current MAC: 08:00:27:3b:23:a1 (CADMUS COMPUTER SYSTEMS)
Permanent MAC: 08:00:27:3b:23:a1 (CADMUS COMPUTER SYSTEMS)
[ERROR] Could not change MAC: interface up or insufficient permissions: Device or resource busy.
I then fixed this by using the following commands:
sudo -i
ifconfig eth0 down
macchanger -r eth0
ifconfig eth0 up
Only, whenever i type the last command, ifconfig eth0 up , my connection is still lost. I cant connect to Internet, cant ping any servers or anything of the sort.
Edit: Using the Adapter Type 'Intel PRO/1000 MT Desktop' allows me to change my MAC address without having to use any other commands, however, when it is set that way, i also have no connection. (Which is why I am currently using the Adapter Type 'PCnet-FAST-III' attached to 'Bridged Adapter')
debian kali-linux
edited Dec 16 at 4:22
Rui F Ribeiro
38.9k1479129
asked Jul 21 '17 at 7:02
ark.pytm
1
(I am running Kali (Debian) on a VM.)
I had been experiencing problems with changing my computer's MAC address, as whenever i try:
root@kali:~# macchanger -r eth0
Current MAC: 08:00:27:3b:23:a1 (CADMUS COMPUTER SYSTEMS)
Permanent MAC: 08:00:27:3b:23:a1 (CADMUS COMPUTER SYSTEMS)
[ERROR] Could not change MAC: interface up or insufficient permissions: Device or resource busy.
I then fixed this by using the following commands:
sudo -i
ifconfig eth0 down
macchanger -r eth0
ifconfig eth0 up
Only, whenever i type the last command, ifconfig eth0 up , my connection is still lost. I cant connect to Internet, cant ping any servers or anything of the sort.
Edit: Using the Adapter Type 'Intel PRO/1000 MT Desktop' allows me to change my MAC address without having to use any other commands, however, when it is set that way, i also have no connection. (Which is why I am currently using the Adapter Type 'PCnet-FAST-III' attached to 'Bridged Adapter')
debian kali-linux
debian kali-linux
edited Dec 16 at 4:22
Rui F Ribeiro
38.9k1479129
asked Jul 21 '17 at 7:02
ark.pytm
1
edited Dec 16 at 4:22
Rui F Ribeiro
38.9k1479129
asked Jul 21 '17 at 7:02
ark.pytm
1
edited Dec 16 at 4:22
Rui F Ribeiro
38.9k1479129
edited Dec 16 at 4:22
Rui F Ribeiro
38.9k1479129
edited Dec 16 at 4:22
Rui F Ribeiro
38.9k1479129
38.9k1479129
asked Jul 21 '17 at 7:02
ark.pytm
1
asked Jul 21 '17 at 7:02
ark.pytm
1
asked Jul 21 '17 at 7:02
ark.pytm
1
1
Seems like you have to rundhclient -v -r eth0 && dhclient -v eth0
– Valentin Bajrami
Jul 21 '17 at 7:12
Given that this is stuff that is explicitly called out, with emphasis, in Arch doco, I am saddened to see that people think that this is an "unclear or not useful" question for a Debian user to ask.
– JdeBP
Jul 21 '17 at 8:05
often it takes a while for picking up the new MAC...
– Rui F Ribeiro
Jul 21 '17 at 8:43
runifconfig eth0to check if changes are aproved to interface, and ping your gateway ip to test if interface is working correctly.
– Krzysztof Stasiak
Jul 21 '17 at 9:39
trysystemctl restart networking
– Bob Johnson
Dec 16 at 6:29
add a comment |
Seems like you have to rundhclient -v -r eth0 && dhclient -v eth0
– Valentin Bajrami
Jul 21 '17 at 7:12
Given that this is stuff that is explicitly called out, with emphasis, in Arch doco, I am saddened to see that people think that this is an "unclear or not useful" question for a Debian user to ask.
– JdeBP
Jul 21 '17 at 8:05
often it takes a while for picking up the new MAC...
– Rui F Ribeiro
Jul 21 '17 at 8:43
runifconfig eth0to check if changes are aproved to interface, and ping your gateway ip to test if interface is working correctly.
– Krzysztof Stasiak
Jul 21 '17 at 9:39
trysystemctl restart networking
– Bob Johnson
Dec 16 at 6:29
Seems like you have to run
dhclient -v -r eth0 && dhclient -v eth0– Valentin Bajrami
Jul 21 '17 at 7:12
Seems like you have to run
dhclient -v -r eth0 && dhclient -v eth0– Valentin Bajrami
Jul 21 '17 at 7:12
Given that this is stuff that is explicitly called out, with emphasis, in Arch doco, I am saddened to see that people think that this is an "unclear or not useful" question for a Debian user to ask.
– JdeBP
Jul 21 '17 at 8:05
Given that this is stuff that is explicitly called out, with emphasis, in Arch doco, I am saddened to see that people think that this is an "unclear or not useful" question for a Debian user to ask.
– JdeBP
Jul 21 '17 at 8:05
often it takes a while for picking up the new MAC...
– Rui F Ribeiro
Jul 21 '17 at 8:43
often it takes a while for picking up the new MAC...
– Rui F Ribeiro
Jul 21 '17 at 8:43
run
ifconfig eth0 to check if changes are aproved to interface, and ping your gateway ip to test if interface is working correctly.– Krzysztof Stasiak
Jul 21 '17 at 9:39
run
ifconfig eth0 to check if changes are aproved to interface, and ping your gateway ip to test if interface is working correctly.– Krzysztof Stasiak
Jul 21 '17 at 9:39
try
systemctl restart networking– Bob Johnson
Dec 16 at 6:29
try
systemctl restart networking– Bob Johnson
Dec 16 at 6:29
add a comment |
2 Answers
2
active
oldest
votes
It is possible that you're just not picking up an IP address, because your DHCP client is not running or needs to be told that there is a new MAC address or needs to be restarted after a MAC address change.
On my machine I would try running dhcpcd -t 10 eth0 to start up a DHCP client but this is not a Debian machine. Debian on-line manuals indicate that on Debian 9 the command is instead named dhcpcd5 or dhclient.
edited Jul 21 '17 at 7:51
JdeBP
33.2k468156
answered Jul 21 '17 at 7:11
mdeanda
111
add a comment |
I guess this will be an answer as I answered the initial question I had,
I finally got internet connectivity to finally work while using Adapter Type 'Intel PRO/1000 MT Desktop', what I had to do was go into crontab -e
and remove the command @reboot macchanger -r eth0 as I found out whenever I try changing the MAC address, its the cause of the internet losing connectivity. I am pretty sure using dhclient -v -r eth0 && dhclient -v eth0 did help, as i previously did remove @reboot macchanger -r eth0 from crontab earlier with no effect.
answered Jul 21 '17 at 17:18
ark.pytm
1
add a comment |
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2 Answers
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active
oldest
votes
2 Answers
2
active
oldest
votes
active
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votes
active
oldest
votes
It is possible that you're just not picking up an IP address, because your DHCP client is not running or needs to be told that there is a new MAC address or needs to be restarted after a MAC address change.
On my machine I would try running dhcpcd -t 10 eth0 to start up a DHCP client but this is not a Debian machine. Debian on-line manuals indicate that on Debian 9 the command is instead named dhcpcd5 or dhclient.
edited Jul 21 '17 at 7:51
JdeBP
33.2k468156
answered Jul 21 '17 at 7:11
mdeanda
111
add a comment |
It is possible that you're just not picking up an IP address, because your DHCP client is not running or needs to be told that there is a new MAC address or needs to be restarted after a MAC address change.
On my machine I would try running dhcpcd -t 10 eth0 to start up a DHCP client but this is not a Debian machine. Debian on-line manuals indicate that on Debian 9 the command is instead named dhcpcd5 or dhclient.
edited Jul 21 '17 at 7:51
JdeBP
33.2k468156
answered Jul 21 '17 at 7:11
mdeanda
111
add a comment |
It is possible that you're just not picking up an IP address, because your DHCP client is not running or needs to be told that there is a new MAC address or needs to be restarted after a MAC address change.
On my machine I would try running dhcpcd -t 10 eth0 to start up a DHCP client but this is not a Debian machine. Debian on-line manuals indicate that on Debian 9 the command is instead named dhcpcd5 or dhclient.
edited Jul 21 '17 at 7:51
JdeBP
33.2k468156
answered Jul 21 '17 at 7:11
mdeanda
111
It is possible that you're just not picking up an IP address, because your DHCP client is not running or needs to be told that there is a new MAC address or needs to be restarted after a MAC address change.
On my machine I would try running dhcpcd -t 10 eth0 to start up a DHCP client but this is not a Debian machine. Debian on-line manuals indicate that on Debian 9 the command is instead named dhcpcd5 or dhclient.
edited Jul 21 '17 at 7:51
JdeBP
33.2k468156
answered Jul 21 '17 at 7:11
mdeanda
111
edited Jul 21 '17 at 7:51
JdeBP
33.2k468156
edited Jul 21 '17 at 7:51
JdeBP
33.2k468156
edited Jul 21 '17 at 7:51
JdeBP
33.2k468156
33.2k468156
answered Jul 21 '17 at 7:11
mdeanda
111
answered Jul 21 '17 at 7:11
mdeanda
111
answered Jul 21 '17 at 7:11
mdeanda
111
111
add a comment |
add a comment |
I guess this will be an answer as I answered the initial question I had,
I finally got internet connectivity to finally work while using Adapter Type 'Intel PRO/1000 MT Desktop', what I had to do was go into crontab -e
and remove the command @reboot macchanger -r eth0 as I found out whenever I try changing the MAC address, its the cause of the internet losing connectivity. I am pretty sure using dhclient -v -r eth0 && dhclient -v eth0 did help, as i previously did remove @reboot macchanger -r eth0 from crontab earlier with no effect.
answered Jul 21 '17 at 17:18
ark.pytm
1
add a comment |
I guess this will be an answer as I answered the initial question I had,
I finally got internet connectivity to finally work while using Adapter Type 'Intel PRO/1000 MT Desktop', what I had to do was go into crontab -e
and remove the command @reboot macchanger -r eth0 as I found out whenever I try changing the MAC address, its the cause of the internet losing connectivity. I am pretty sure using dhclient -v -r eth0 && dhclient -v eth0 did help, as i previously did remove @reboot macchanger -r eth0 from crontab earlier with no effect.
answered Jul 21 '17 at 17:18
ark.pytm
1
add a comment |
I guess this will be an answer as I answered the initial question I had,
I finally got internet connectivity to finally work while using Adapter Type 'Intel PRO/1000 MT Desktop', what I had to do was go into crontab -e
and remove the command @reboot macchanger -r eth0 as I found out whenever I try changing the MAC address, its the cause of the internet losing connectivity. I am pretty sure using dhclient -v -r eth0 && dhclient -v eth0 did help, as i previously did remove @reboot macchanger -r eth0 from crontab earlier with no effect.
answered Jul 21 '17 at 17:18
ark.pytm
1
I guess this will be an answer as I answered the initial question I had,
I finally got internet connectivity to finally work while using Adapter Type 'Intel PRO/1000 MT Desktop', what I had to do was go into crontab -e
and remove the command @reboot macchanger -r eth0 as I found out whenever I try changing the MAC address, its the cause of the internet losing connectivity. I am pretty sure using dhclient -v -r eth0 && dhclient -v eth0 did help, as i previously did remove @reboot macchanger -r eth0 from crontab earlier with no effect.
answered Jul 21 '17 at 17:18
ark.pytm
1
answered Jul 21 '17 at 17:18
ark.pytm
1
answered Jul 21 '17 at 17:18
ark.pytm
1
answered Jul 21 '17 at 17:18
ark.pytm
1
1
add a comment |
add a comment |
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Seems like you have to run
dhclient -v -r eth0 && dhclient -v eth0– Valentin Bajrami
Jul 21 '17 at 7:12
Given that this is stuff that is explicitly called out, with emphasis, in Arch doco, I am saddened to see that people think that this is an "unclear or not useful" question for a Debian user to ask.
– JdeBP
Jul 21 '17 at 8:05
often it takes a while for picking up the new MAC...
– Rui F Ribeiro
Jul 21 '17 at 8:43
run
ifconfig eth0to check if changes are aproved to interface, and ping your gateway ip to test if interface is working correctly.– Krzysztof Stasiak
Jul 21 '17 at 9:39
try
systemctl restart networking– Bob Johnson
Dec 16 at 6:29