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Internet, Networking, and Wireless
Port 8080 stopped working
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<blockquote data-quote="ycombinator" data-source="post: 1519077" data-attributes="member: 303444"><p>I have been experiencing a strange situation on my Mac OS X 10.8.3 laptop the last week or so.</p><p></p><p>If run a port scan using the Network Utility tool, it shows that port 8080 is open. Indeed, if I run <span style="font-family: 'Courier New'">telnet localhost 8080</span> from the command line, the connection is successful. If I run <span style="font-family: 'Courier New'">sudo lsof -i :8080</span>, however, nothing comes up.</p><p></p><p>Further, I am able to create a server and bind it to port 8080 (using <span style="font-family: 'Courier New'">nc -l localhost 8080</span>). When I run <span style="font-family: 'Courier New'">telnet localhost 8080</span>, the connection is successful (as before) but any text I enter does not show up in the <span style="font-family: 'Courier New'">nc</span> output.</p><p></p><p>How is it possible that a port is open but nothing is actually listening on it?</p><p></p><p>Clue: This was working as expected until a few days ago, when I was playing with some VPN clients.</p><p></p><p>Thanks!</p></blockquote><p></p>
[QUOTE="ycombinator, post: 1519077, member: 303444"] I have been experiencing a strange situation on my Mac OS X 10.8.3 laptop the last week or so. If run a port scan using the Network Utility tool, it shows that port 8080 is open. Indeed, if I run [FONT="Courier New"]telnet localhost 8080[/FONT] from the command line, the connection is successful. If I run [FONT="Courier New"]sudo lsof -i :8080[/FONT], however, nothing comes up. Further, I am able to create a server and bind it to port 8080 (using [FONT="Courier New"]nc -l localhost 8080[/FONT]). When I run [FONT="Courier New"]telnet localhost 8080[/FONT], the connection is successful (as before) but any text I enter does not show up in the [FONT="Courier New"]nc[/FONT] output. How is it possible that a port is open but nothing is actually listening on it? Clue: This was working as expected until a few days ago, when I was playing with some VPN clients. Thanks! [/QUOTE]
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Port 8080 stopped working
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