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I have a personal website running on my PC (Ubuntu), connected to the internet through a router. I can connect without any problem to my website when I'm not at home so I guess my router is correctly configured but whem I try to access the site using a local adress at home (192.168.XX.XX), it times out after 30 seconds or so.

What tool could I use to find out where is the problem? I have tried a tracert command on my Windows PC but add just a useless line. If it's of any help, my website is running on Tomcat 6 but I don't think the problem is here as it would be weird that the server would be configured to be accessible from the internet but not the local network.

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It may be that your subnet mask is incorrect, so the Windows PC is trying to reach the website via the router. If they're on the same subnet, with matching netmasks, no routing should need to happen. You haven't said what the useless line on the tracert said. –  Adam Thompson Nov 27 '12 at 10:44
    
If the Windows PC tries to reach the router, shouldn't it work anyway as my router is correctly configured to let connections from the internet in? Anyway here is the tracert result: C:\Users\Romain>tracert 192.168.1.56 Détermination de l'itinéraire vers XXXXXX.no-ip.org [192.168.1.56] avec un maximum de 30 sauts : 1 Romain-PC [192.168.1.22] rapports : Impossible de joindre l'hôte de destination. Itinéraire déterminé. It is in French but basically it says the host can't be reached. –  Romain Nov 27 '12 at 11:38
    
Can you get to the computer by doing your public IP address instead of private? –  Duall Nov 27 '12 at 15:07
    
I tried with the public IP, same result (time out after 30 seconds). –  Romain Nov 27 '12 at 18:42

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