Simple step for your ADSL
Check steps:
1. Serperate prblem inside or outside: Use your computer directely connect to ADSL modem. If it can access internet then your router has problem. If it can not access internet, unplug the modem power to and plug again after 5 minutes. Try again. If there are same problem, call your ISP for technical support.
2. Check your router has the right NAT settings. If your router can provide DNS/IP/Gateway, you may need to set NAT policy or router policy. Normally, you need set interface for WAN (outside) and LAN (inside).
Lin