Network Error (dns_server_failure)
Your request could not be processed because an error occurred contacting the DNS server.
The DNS server may be temporarily unavailable, or there could be a network problem.
For assistance, contact your network support team.
From 1.May.2012, google DNS changes ghs.google.com domain (old domains: NS1.GOOGLEGHS.COM, NS2.GOOGLEGHS.COM, NS3.GOOGLEGHS.COM, NS4.GOOGLEGHS.COM). So, all bloggers could not connect to them domains. Eg: when you connect to my domain k3lvinmitnick.com, above error occured (dns_server_failure). Here is how to Fix:
1) Do not need to change in your blogspot settings
2) Change settings in your domain: Log in your domain panel then add new A (Host)
3) Waiting ... for your domain update.
P/S: May be you have to forward your domain to www.your domain. Eg: forward k3lvinmitnick.com to www.k3lvinmitnick.com
Step 1: Domains > Domain Management
Step 2: Select domain to change
Step 3: Click to Change in "DNS manager"
Step 4: Add new A (Host)