Now let begin -
Problem 1 - I can connect to my wireless network, can't surf the net and windows say Limited connectivity or Local connection only, what am I gonna do?
Ans. this problem could be cause by lack of DNS entry on your router or DNS entry on your computer.
to check on Windows if you have a DNS entry type
ipconfig /all <- usually this would show all the details of your card, you should be able to see if there is a DNS entry assigned to it, there is a class c IP address assigned to you usually start with 192.168.*.* , and also check if there is a gateway which should be your routers IP address, if one of these is missing then you have to correct it.
To renew your IP Adress on Windows use the command
ifconfig -a <- should show you the IP address and your interface details, such as IP, MAC address.
to check for gateway on Linux you need to issue the command
route <- you will be presented with a routing table, default Gateway should be defined to check if you have a DNS entry on Linux issue the command cat /etc/resolv.conf <- it should return something like "nameserver IP ADDRESS HERE" another way of identifying DNS problem is by issuing the following command Linux and Windows nslookup 184.108.40.206 <- if you receive a reply like the one below then its not a DNS problem
Now that we have eliminated DNS problem
You have to check your routers configuration and make sure it not your internet provider that having connection issue.
use the ping command
ping yourgatewayiphere <- you should get a reply something like the one below Pinging 220.127.116.11 with 32 bytes of data:
Reply from 18.104.22.168: bytes=32 time=693ms TTL=238
Problem 2 - Cannot connect to the network at all
Make sure that wireless is turned on, and that your router is broadcasting SSID and has DHCP on, also make sure that the router is turned on, otherwise you will need to connect using a cable and see if you can connect.
NOTE: if all else fails try restarting(turn on/off) your router, most of the time this fixes it.
Thats it for now.