[SOLVED] Can't ping VM even after disabling firewall

Mark_667 · 07-15-2015, 09:44 AM

I have a RedHat VM which has a DHCP lease on my network and can ping the IP address it thinks it's on as well as localhost, but can't ping out and I can't ping in. I'm pretty sure I'vge disabled the firewall, what else can I check?

netnix99 · 07-15-2015, 10:33 AM

Mark,

What is the IP address, subnet mask, and gateway of the VM?
What is the IP address, subnet mask, and gateway of the host?
What is the network address/subnet mask of the network you are trying to reach?

These may sound redundant, but they could, in fact, all be different. If the host is directly connected to the network you are trying to reach, you can leave out step three.

Mark_667 · 07-15-2015, 11:02 AM

The VM and host are on the same subnet, other VMs on the same host are fine. The address I'm trying to reach is also on the same network.

netnix99 · 07-15-2015, 12:42 PM

What version of Red Hat are you running?

If all of the hosts and VM are on the same subnet, it sounds to me like it is a firewall issue, unless you have a typo on the subnet mask of the VM...

jefro · 07-15-2015, 02:36 PM

I'd have to assume you have a bridged network config on the vm correct? And what vm are you running?

Ping kind of stinks but lets move past that.

To access an IP or domain name outside your subnet you'll have to have a gateway and possibly a dns address. Do you have those correctly applied in the client?

Mark_667 · 07-16-2015, 03:59 AM

The VM has a bridged connection to the host on the same subnet and the VM has a gateway. I'm pinging IP addresses so it can't be DNS related. It's RedHat Server 6.3 Santiago

I used the following commands to disable the firewall, does anyone know if these are right or if there's anything else I need to do?

Code:

service iptables save
service iptables stop
chkconfig iptables off

Any further advice would be appreciated.

Edit:
I ran

Code:

dmesg | grep eth

and got a lot of entries like:
transmit timed out
resetting

netnix99 · 07-16-2015, 09:20 AM

What does

Code:

service iptables status

report?

Mark_667 · 07-16-2015, 10:36 AM

Got it, it was because I hadn't installed the Hyper-V Integration Services for Linux. Apparently this isn't necessary for slightly later versions of RHEL. Thanks for everyone's input.

netnix99 · 07-16-2015, 11:36 AM

excellent! don't forget to make it as solved!

jefro · 07-16-2015, 03:50 PM

Thanks for the update and solution.