A typical wireless router usually prevents machines from the outside (WAN) to see the machines connected to the inside (LAN). Moreover it probably uses NAT (Network address translation) which prevents machine from the WAN to directly address the ones on the LAN. On the other hand this feature enables to share a single internet IP with multiple computers.
And because you have only 1 static IP address to connect to the Internet I don't how you could connect multiple machines directly on this network.
So a way I could think of to join the network with multiple machines is to check if your router as a mode of operation called "Bridge". In this mode the router will disable all network services like DHCP and NAT and connect directly all computers to the other network (almost like a simple switch). However this means that you would need to set static addresses to all you computers but like I said you may not have this possibility.
UPDATE
Another solution could also be to put one of your machine in the DMZ of your router. For this you need to connect your router exactly like you described. Like you said only the machines inside the router see themselves. Go in the DMZ tab in the configuration of your router and put the IP of one of your PC in as DMZ. This needs to be the IP given by your router, most likely something like 192.168.x.x. This machine in the DMZ should now be able to see all others outside of your router. This will not make all internal machine see the external ones but at least one will do and the others will be able to use the internet.
Your question is very confusing. Please revise and try to pin point only the necessary info to help us formulate the best possible solution. – Rudolph – 2014-02-17T15:31:34.003
@Rudolph i have edited my question please take a look. – maniteja – 2014-02-17T15:40:28.190
Thanks. Do you use a static IP on the computer / device to connect to the internet or did you mean a static IP on the router? – Rudolph – 2014-02-17T15:45:51.740
when i plug in the cable directly i use tthe static ip on computer , when i use the router i use static ip on router – maniteja – 2014-02-17T15:46:57.857
Your question is still very confusing. I don't understand the distinction between plugging in the cable directly and using the router. What cable? Where does the other end go? How were you not using the router before? What does it mean to not be able to connect to the LAN when you can see other machines? – Marcks Thomas – 2014-02-17T16:17:43.357
1I assumed that the LAN that is mentioned in the question is actually the WAN when seen from the router. So when connecting a computer directly to his modem he seems to see the computers of his neighbors as if it was actually a LAN shared within a building or something like that. – jmbouffard – 2014-02-17T16:40:00.383
i mean the internet cable that is provided by my isp when i use it directly with my computer im able to see all the machines on the LAN but when i plug in the internet cable into the router and use the router cable with my computer then im not able to see other machines on the LAN just the laptops that connect to the router are visible – maniteja – 2014-02-17T16:40:48.893
1@jmbouffard exactly sir we are small gated community and all the computers in our community are visible when i connect directly with the internet cable given by my isp – maniteja – 2014-02-17T16:44:04.720
@maniteja Take a look I added an update to my solution. You could use DMZ to have at least one of your internal computers see the external network. – jmbouffard – 2014-02-17T17:05:38.520