"Network is unreachable" error on Kali Linux on Virtual Box VM on Mac OSX

EmileDiaz · 12-08-2019, 05:42 PM

Hi all:

New to Kali Linux and this forum. I am running Kali on a VirtualBox on a mac laptop.

I'm unable to ping a url or an ip. I get either a ""Temporary failure in name resolution" or "Network is unreachable" when I try various network queries. Seems like I either don't have a proper DNS configured or something else perhaps

I am posting details of some basic info below that I did to see what the "/etc/hosts" and "etc/resolv.conf" files contain. Also I did some looking to see what the "ip a" or "ifconfig" bring up. Particularly worrisome was the" route -n" query (see below) which brought up nothing under the headings of "Destination" "Gateway" "Genmask" etc...That all looks wrong but I don't know enough to fix it.

When I try and set the ip of my router for eth0 is when I get the "network is unreachable" error.

Perhaps someone can read the details below and help.

Many thanks.

Please see code below:

Code:

root@kali:~# cat /etc/hosts
127.0.0.1 * * * localhost
127.0.1.1 * * * kali
# The following lines are desirable for IPv6 capable hosts
::1 * * localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

root@kali:~# cat /etc/resolv.conf
nameserver 8.8.8.8

root@kali:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
* * link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
* * inet*127.0.0.1/8*scope host lo
* * * *valid_lft forever preferred_lft forever
* * inet6 ::1/128 scope host
* * * *valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
* * link/ether 08:00:27:06:50:51 brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
* * link/ether 48:02:2a:b1:0f:a7 brd ff:ff:ff:ff:ff:ff

root@kali:~# ifconfig
lo: flags=73<UP,LOOPBACK,RUNNING> *mtu 65536
* * * * inet 127.0.0.1 *netmask 255.0.0.0
* * * * inet6 ::1 *prefixlen 128 *scopeid 0x10<host>
* * * * loop *txqueuelen 1000 *(Local Loopback)
* * * * RX packets 4 *bytes 240 (240.0 B)
* * * * RX errors 0 *dropped 0 *overruns 0 *frame 0
* * * * TX packets 4 *bytes 240 (240.0 B)
* * * * TX errors 0 *dropped 0 overruns 0 *carrier 0 *collisions 0

root@kali:~# route -n
Kernel IP routing table
Destination * * Gateway * * * * Genmask * * * * Flags Metric Ref * *Use Iface
root@kali:~#*

yancek · 12-08-2019, 06:08 PM

If you plan to use Kali to learn computer forensics/penetration testing, I would suggest that you bookmark and read their excellent documentation. THe networking issue should be explained at the page below at the Kali doc site.

https://www.kali.org/docs/policy/kal...vice-policies/

EmileDiaz · 12-08-2019, 07:05 PM

Quote:

Originally Posted by yancek

If you plan to use Kali to learn computer forensics/penetration testing, I would suggest that you bookmark and read their excellent documentation. THe networking issue should be explained at the page below at the Kali doc site.

https://www.kali.org/docs/policy/kal...vice-policies/

yancek: Ok so your post was extremely helpful. I get it:

Code:

"Kali Linux, as a standard policy, will disallow network services from persisting across reboots by default"

So fine, that explains why after every reboot I had the same issue remerge.

I was able to fix all of my networking issues by:

Code:

sudo dhclient eth0

For the moment I have to do this at every reboot.

But again, as your very helpful link says that I can make the service persist by the following command:

Code:

systemctl enable

But what service exactly should I enable to persist? Sorry, but I am a newbie!

Or as the link says:

Code:

Service whitelists and blacklists can be found in the /usr/sbin/update-rc.d file.

So perhaps I can add the service to the whitelist to persist across reboots.

But can you or anyone help with exactly what service I would enable or whitelist.

Thanks again for the link. It was eye-opening.

ondoho · 12-09-2019, 01:54 AM

Duplicate of https://www.linuxquestions.org/quest...ir-4175665605/ ???