i have just installed opensuse on my dell latitude d505 notebook and none of my apps can connect to the internet (wlan or ethernet). my network and wireless cards show up in network settings and so does my ethernet connection, but my internet pages/im logins always time out.
depends on how you connect, fibre/dsl etc. things to check:
1 ) check setup is ok,e.g. for wireless, encryption is as per the router
2 ) firewall is set up correctly
3 ) ipv6 is disabled
4 ) MAC address filtering is not being used by router,if it is make sure your MAC address is added