OS 11.2: Cannot now access Internet

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http://forums.opensuse.org – Is there a network trouble shooting guide for OS 11.2 that I could follow? I've shot myself in the foot so I should try to fix it. I changed the DNS server addresses and the number of IP addresses on my router. I then set my Linux system to use static IP addressing and edited the network settings for my network adapter accordingly. I can now no longer get to any web-site. By contrast, I also updated 1 of my Windows computers in a similar way; it continues to work without problem. Are there some obvious things I should look at first? (Distributions)