"No ports open" on scan for Linux server

jackburace1732 · 2011-12-29T11:48:03.000Z

I have a CentOS server running and Spiceworks is saying “No open ports for this device were found to be responding.”

I can manually SSH into it, so the SSH port is open. I entered the username/password under the Scan settings as type SSH.

Yet after a rescan, it’s still saying no open ports. Why is this? The SSH user/pass is correct and the SSH port is open.

dehcbad25 · 2011-12-29T11:52:18.000Z

I would have to think it could be a firewall issue. Most likely it is detecting a port scan and blocking it

jackburace1732 · 2011-12-29T12:06:00.000Z

iptables is running, so I just tried stopping that service and doing another scan. No luck, same error.

dabeast · 2011-12-29T12:23:27.000Z

in the network scan settings, there is a test function - can you test and validate that the SSH is open from the SW server?

You scan range that includes this server does have SSH turned on right?

jackburace1732 · 2011-12-29T12:26:31.000Z

Got it, I had to add the IP in manually under Scan Entries and tell it to use that SSH account.

Not sure why the auto network scan didn’t seem to pick it up as SSH.

dehcbad25 · 2011-12-29T12:46:02.000Z

it is possible that the DNS entry is not right if you were scanning the hostname