How to access a IP address with a specific Src and Dst port

Question

Hello, 
 I found on my network something that's looks like a router (Dst IP 192.168.1.255), but I would like to discover what's exactly this. I tried to access it by the simple way of putting its own IP on my safari browser. But it didn't works. And on Sophos the client (represented by the Src IP) has all of his logs allowed to this Dst IP ( 192.168.1.255). What should I do? 
 
 Thanks!

dirkkotte · Answer

The source port is usually completely irrelevant. However, you cannot access a broadcast address. The device listens alone and the broadcast address and port 1688 responds with its own address. A browser can't handle that. 
 ( https://social.technet.microsoft.com/Forums/WINDOWS/en-US/7acaf329-a6dc-4268-abfb-c5f775b48078/locating-a-kms-server?forum=winserversetup )

How to access a IP address with a specific Src and Dst port

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