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I created a new SharePoint web application at port 100. I created a default site collection. When I try to access it from the server machine it opens just fine. When I try to access it from a different machine I get page not found error. Both machines belong to the same network and the same domain. What do I need to set up (in IIS, I guess) to make it work?

Please note that I do have another web application set up at port 80 which opens just fine from both machines.

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Did you check the firewalls (on both machines?) – Dribbel May 11 '12 at 9:36
^What he said. Yeah, I'd stick to using port numbers above 1023 for additional web applications. Ports below that are well-known ports, and are often in use. See – Andy Burns May 11 '12 at 10:25
@Dribbel Thank you, the firewall was the cause of the problem. Much appreciated – Boris May 11 '12 at 11:07
up vote 2 down vote accepted

You should open up port 100 on the firewall by using Windows Firewall with Advanced Security.

Inbound Rules > Port > Protocol:TCP, Specific Port: 100 > Allow the connection > Apply to all zones > Enter a rule name > Finish.

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Thank you, the firewall was the cause of the problem. – Boris May 11 '12 at 11:06

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