The host machine is a company Windows 7 laptop on a corporate network. I have two virtualbox machines. One is Ubuntu 15.04 and the other is CentOS 7.

The VBox settings are identical for both machines but I cannot get networking on the Centos VBox. The Ubuntu VBox works fine.

A ping will hang with no error messages and trying to load a webpage in a browser times out.

Unable to paste my ifconfig output here. The Network settings gui shows "Wired" as "Connected 1000Mb/s". IPv4 is on and Addresses is set to Automatic (DHCP). DNS and Routes are both set to Automatic.

Wish I could provide more details. I welcome all comments, suggestions, or advice.

Cheers,

In CentOS, what are the contents of the network configuration files?

They are listed here, so I won't bother to type out their names:
https://www.centos.org/docs/5/html/5...pts-files.html

Note the warning at the bottom of that page.

Would a screenshot be possible?

When you run ifconfig (does it actually exist in Centos 7? I thought it's obsolete now), or ip addr, do you see an IP address? Also of importance is the routing table, ip route will show it. You need a valid default route.

VBOX allows unplugging the "cable". Check that as well.

With Centos 7, I had the funny problem that udev ignores interfaces with certain MAC addresses. I managed to give my VM precisely those addresses; took me ages to figure this out. But if you see the interfaces in the ifconfig or ip addr output, that shouldn't be the case.

Took my work laptop home and Centos connected with not issue.

Something at work is preventing the CentOS from connecting. My network setting are identical (at least as far as I can tell) between the two virtual machines but one works and the other does not.

I even manually cut and pasted the settings from the .vbox files and still one works and the other does not.