Accessing internet from SQL

I used following command to access a website from SQL

select utl_http.request('http://www.geekinterview.com/') from dual;

It is showing message

The following error has occurred:

ORA-29273: HTTP request failed
ORA-06512: at "SYS.UTL_HTTP", line 1568
ORA-12545: Connect failed because target host or object does not exist

Could any please suggest what is wrong with above command?

Please find about utl_http [URL="http://www.oracle.com/technology/sample_code/tech/pl_sql/htdocs/x/Utl_Http_Package_Enhancements/Cr_Using_Utl_Http.htm"]here[/URL] ,[URL="http://download-uk.oracle.com/docs/cd/B10501_01/appdev.920/a96612/u_http.htm"]here[/URL] and [URL="http://download-uk.oracle.com/docs/cd/B10501_01/appdev.920/a96612/u_http2.htm"]here[/URL].