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No Internet Connection from VMware with CentOS 7

No Internet Connection from VMware with CentOS 7

By Chandan Kumar  |  Last Updated: July 12, 2016

New Look. New CentOS!

Yes, that’s what CentOS 7 says. Anyway, lately I installed CentOS 7 over VMware and installation were quite smooth. Immediate after installation, I tried to browse some web and it was failing. While doing basic troubleshooting, I noticed there were no IP when I did ifconfig.

In this article, I will talk about how to fix if you don’t get the Internet on VMware with CentOS 7.

[[email protected] ~]$ ifconfig
ens32: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500 
ether 00:0c:29:68:22:e2  txqueuelen 1000  (Ethernet) 
RX packets 0  bytes 0 (0.0 B) 
RX errors 0  dropped 0  overruns 0  frame 0 
TX packets 0  bytes 0 (0.0 B) 
TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
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 0  (Local Loopback) 
RX packets 642  bytes 55820 (54.5 KiB) 
RX errors 0  dropped 0  overruns 0  frame 0 
TX packets 642  bytes 55820 (54.5 KiB) 
TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
[[email protected] ~]$

That leads me to think either network adaptor is not enabled or failed to obtain DHCP IP address.

Quick Solution 

  1. Access terminal/console
  2. Become a root if you are not already
  3. Execute “dhclient –v” command
  4. You will notice it will bound IP address (certainly not as shown here) as shown below
[[email protected] network-scripts]# dhclient -v
Internet Systems Consortium DHCP Client 4.2.5 Copyright 2004-2013
Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/ Listening on LPF/ens32/00:0c:29:68:22:e2
Sending on   LPF/ens32/00:0c:29:68:22:e2
Sending on   Socket/fallback DHCPDISCOVER on ens32 to 255.255.255.255 port 67 interval 4 (xid=0x433a9e33) DHCPREQUEST on ens32 to 255.255.255.255 port 67 (xid=0x433a9e33)
DHCPOFFER from 172.16.179.254 DHCPACK from 172.16.179.254 (xid=0x433a9e33) bound to 172.16.179.136 -- renewal in 822 seconds.
[[email protected] network-scripts]#

5.     Boom, that’s all, you should have the Internet now. You will also notice IP when you do ifconfig.

[[email protected] network-scripts]# ifconfig
ens32: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500 
inet 172.16.179.136  netmask 255.255.255.0  broadcast 172.16.179.255 
ether 00:0c:29:68:22:e2  txqueuelen 1000  (Ethernet) 
RX packets 11  bytes 1255 (1.2 KiB) 
RX errors 0  dropped 0  overruns 0  frame 0 
TX packets 23  bytes 3536 (3.4 KiB) 
TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
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 0  (Local Loopback) 
RX packets 770  bytes 66956 (65.3 KiB) 
RX errors 0  dropped 0  overruns 0  frame 0 
TX packets 770  bytes 66956 (65.3 KiB) 
TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Add this in auto-startup

You might be interested in putting this in auto-startup so you don’t have to do this every time you start the CentOS VM. This is how you can put the script in auto-startup so it starts automatically after VM is rebooted.

  • Go to /etc/init.d
  • Create a file with following, I have kept the name as “net-autostart“
#!/bin/bash
# Solution for "No Internet Connection from VMware"
#
### BEGIN INIT INFO
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
### END INIT INFO
dhclient -v
  • Save the file
  • Change the file permission as executable
chmod 755 net-autostart
  • Add this script for auto-start using chkconfig command
chkconfig --add net-autostart
  • Restart VM to test

I hope this helps. Let me know how it goes with you.

Comments

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Comments

  5. I had the same probnlem when first starting centos 7 on vmware. No network connection.
    I found the right solution, instead of scripting around it I just switched on the network interface in the network settings (desktop, upper bar, left of day/time field). Maybe this is intended behaviour to prevent the system from going online before it’s configured correctly.

    Reply

  12. This worked for me two days ago, I didn’t save it to the bash, so when I started my vm today, there is no Internet again.

    I then proceed to run the same command again, but this time no more magic.

    Why? Can you sort it out? Thank you so much.

    Reply

  15. Thanks a lot for your post. Its worked for internet connection as well as to establish communication between host and guest machine. I broke my head for this with many IP configurations.

    Reply

  18. Hi Chandan. First off all, sorry for my english.

    I faced the same issue on CentOS7 running on VMware, but when I tried to apply your fix under this version, some error is showed, specifically with the command “chkconfig –add net-autostart”. So, I started to looking for other ways to fix it.

    I believe that the roots issue starts on the installation. During the installation steps, inside the networks options, the interface is marked in DOWN state, you need to manually change to UP. Whit this, this behavior disappears and is not necessary running a scripts to turns on the interface.

    If you don’t notice of this during the installation, like us :), is easy to solve it. Just needs to find the config file of the interface under the folder: /etc/sysconfig/network-scripts/ .For example, ifcfg-ens33

    Inside this file, you will find the value ONBOOT=no, just change it to “yes”. And will be solved.

    I hope it will be useful,

    Regards.
    Federico.

    Reply

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