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@@ -30,6 +30,32 @@ This should result in an output like the following.
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Nmap done: 1 IP address (1 host up) scanned in 4.60 seconds
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Raw packets sent: 0 (0B) | Rcvd: 0 (0B)
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+If you have open ports, you might see something more like this.
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+
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+ Starting Nmap 6.47 ( http://nmap.org ) at 2015-06-04 09:52 UTC
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+ Initiating Ping Scan at 09:52
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+ Scanning fcde:c974:bde5:a226:b8a9:bd8:3e8:7df5 [2 ports]
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+ Completed Ping Scan at 09:52, 0.00s elapsed (1 total hosts)
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+ Initiating Connect Scan at 09:52
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+ Scanning fcde:c974:bde5:a226:b8a9:bd8:3e8:7df5 [65535 ports]
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+ Discovered open port 40499/tcp on fcde:c974:bde5:a226:b8a9:bd8:3e8:7df5
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+ Discovered open port 53529/tcp on fcde:c974:bde5:a226:b8a9:bd8:3e8:7df5
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+ Completed Connect Scan at 09:52, 4.66s elapsed (65535 total ports)
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+ Nmap scan report for fcde:c974:bde5:a226:b8a9:bd8:3e8:7df5
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+ Host is up (0.00079s latency).
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+ Not shown: 65533 closed ports
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+ PORT STATE SERVICE
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+ 40499/tcp open unknown
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+ 53529/tcp open unknown
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+
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+If port 22 were open, you could probably guess that SSH is responsible.
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+But what the heck is using 40499? Here's how you figure that out.
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+First, install `netstat` (`pacman -S net-tools` on Arch, for example).
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+Second, run the following netcat command and read the lines that
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+reference those ports.
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+
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+ netstat -tulpn
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+
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## 3: If you see anything open, fix it.
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Examples for SSH and Samba are below.
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Thomas Levine