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I had accidentally opened a port via firewall which had a WEBSITE(IIS EXPRESS) localhost port number. So could my desktop be hacked by opening a port? And also i had deleted it after a few minutes.

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  • It depends which OS you're using, port and what service was running on that port during the exposure.
    – kenorb
    Commented Aug 26, 2015 at 15:21
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    Which port did you open? Is there a program listening on the port? Where is the Firewall running (on PC or external)? What do you mean with localhost? Really "Localhost" or "local host"=PC?
    – Werner Henze
    Commented Aug 26, 2015 at 15:22
  • Is the firewall running on your desktop, or is it a separate device? If it's separate then there is no way to open up the non-routable localhost addresses (like 127.0.0.1).
    – GuitarPicker
    Commented Aug 26, 2015 at 15:23
  • You're most likely fine by the sounds of things - I doubt someone was actively attempting to infiltrate your home PC.
    – Jay
    Commented Aug 26, 2015 at 15:26
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    It's very unlikely any harm was done if it was only open for a few minutes.
    – DavidPostill ♦
    Commented Aug 26, 2015 at 15:32

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If you're behind a firewall (common ISP router) don't worry, unless a NAT/PAT on that router no one reached you. Also, if with localhost you mean you binded it to localhost, only connections from the same machine could be happened.

Don't worry anyway.

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  • could you elaborate a bit as i was trying to connect my phone to the local host by opening a port (having the same wifi network) and also its a d-link wifi router
    – megh gandhi
    Commented Aug 26, 2015 at 16:07

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