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I have to control two remote client workstations, but are located behind a router, so I did in the router configuration, a redirection of ports used by the software, only problem that I can redirect to a single local IP address, So to one post, how to fix this problem so that I can control the two positions? Thank you in advance for your answers.
Put your own router on foot from old parts has some advantages compared to commercially available routers such as Linksys or others. The major advantage is the control you have over the connection, other benefits depend on your imagination and what you decide to do with your router. You need to use NAT (Network Address Translation) which allows multiple machines to access the Internet from a single IP address, tell you how to install and use common services such as DNS (with dnsmasq) , DHCP (with dhcp), ADSL (ppp) and finally show you some nice examples of using your router such as port forwarding. Before continuing, please check that you have the required elements. You need a computer with at least two network cards. You also need information about your Internet connection on hand (IP addresses, DNS servers, gateway, user name and password).
It would be nice if all your computers could connect to your network without having to reconfigure and without having to memorize IP addresses.'s Install a DHCP server to allocate IP addresses automatically. A DHCP server, as its name implies in English (the Dynamic Host Configuration Protocol) allows you to configure the machines that connect to your network when they connect. You must install a DHCP server on your router and configure it according to your network (valid IP addresses, DNS).
When you visit a website, you are using a site name, because it's easier to remember than IP address, This implies the use of a DNS server will find the IP address of a server from the site name you type. You can find more information about DNS servers on Wikipedia. As we use dnsmasq as DHCP server and it includes a DNS server, you have nothing else to do here! Your router already provides name resolution to its DHCP clients. Do you want everything to be simple, is not it? You can very well choose other DNS servers if you are more comfortable with them, but why dnsmasq is great is that it was designed to do exactly what we want and nothing else.
The routing table is a table of correspondence between the address of the victim and the next node to which the router must deliver the message. In reality it is sufficient that the message be delivered on the network that contains the machine, so it is not necessary to store the full IP address of the machine: only the network identifier of the IP address (that ie the network ID) needs to be stored.
There are different levels of routers, they therefore use different protocols:
* The core routers are backbone routers because they are the ones that connect different networks.
* The external routers allow a connection between their autonomous networks. They work with a protocol called EGP (Exterior Gateway Protocol) that evolves slowly, keeping the same name
* The internal routers provide routing information within an autonomous network. They exchange information through protocols called IGP (Interior Gateway Protocol), such as RIP and OSPF.