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What Is Lan?

What are the ways to access to a PC on a LAN from the internet ?

  • Several PCs (with ips - 192.168.1.x) are there in a LAN which is connected to the internet via a router (cum modem) (router-ip or gateway of the LAN is 192.168.1.1) . However the global ip address is same for all PCs on the LAN!  Now how would one access an individual LAN PC from the internet ?

  • Answer:

    The answer to this depends in part on what kind of access you have in mind, but there is a general answer. What you're doing is called NAT which allows multiple "private" addresses to share one or more "public" addresses. This is common in many networks for conservation of limited IPv4 space. To reach the "private" addresses you can either use a reverse port translation so each pc is assigned a unique tcp or udp port to run the application you want to connect to (commonly RDP). Another method is using a tunnel (VPN, GRE, etc) so you can route across the internet to the "private" network. The second approach works best if can't control the ports you need to connect to or if you have multiple applications you need to connect to.

K. Scott Helms at Quora Visit the source

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For my home network, I use a VPN server which is inside my network. Whenever I am away from home, I can set up a VPN connection to this server and have the same network environment as I would have when I am home. We use the same principle at the place where I work. This requires some knowledge of networking, firewalls and port forwardings.

Wim Haanstra

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