Check to see if your port is really open.


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This one is pretty handy.  Lets say you have a crappy little home router and you have to open a port, the html interface of the router says your port is open, but is it really?  This great little tool finds your external IP address and then lets you check to see if your port is open.  I tried this on a proxy and it pulls the proxies IP perfectly and is able to get the ports that are open. 

Email down? maybe your ISP is dumb and blocked your port 25 (outgoing SMTP) or port 110 (pop3).  In any case this simple web application will tell you whether your port is open or not.

Check it out

Read more posts by Christopher Carey

December 11, 2007 | Filed Under Web 2.0 

Comments

5 Responses to “Check to see if your port is really open.”

  1. MiCCAS on MyAvatars 0.2 December 20th, 2007 11:33 am

    Very good system, I actually made a script that checks this! It’s a handy tool to have.

  2. multippt on MyAvatars 0.2 December 21st, 2007 2:27 pm

    If you have Windows Firewall or some other firewall in your computer, you can simply check its settings and it should have a list of allowed ports (all other ports are blocked). Of course, this tool would be great for checking if the ISP/router blocked something it shouldn’t be blocking (but that’s unlikely).
    To get your IP address, simply check your network connection properties (most online IP checkers may not be able to check for certain IPs accurately if you are behind some proxies).

  3. MiCCAS on MyAvatars 0.2 December 21st, 2007 9:56 pm

    @multippt: You’d also need to check your router and make sure you’re PORT FORWARDING the appropriate ports if you wanted them to be open.

    More info at http://www.portforward.com

  4. Florence on MyAvatars 0.2 December 25th, 2007 6:22 pm

    thanks, really helps

  5. Zlobomir on MyAvatars 0.2 January 3rd, 2008 3:41 pm

    Hello,

    Very useful indeed, but I need not just a checker but a constant monitor, if possible, even a program checking on given intervals, and resetting my “crappy little home router” :D when necessary.

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