Server not found
      Firefox can't find the server at www. opera .com

ping www. opera. com

[igor@localhost ~]$ ping www  .opera  .com
PING www.  route53.  opera.  com (54.  244.  236.  138) 56(84) bytes of data.

ping opera.   com

[igor@localhost ~]$ ping opera.com
PING opera . c om (185  .26.  182.  79) 56(84) bytes of data.
64 bytes from front-ams.  opera.  com (185.  26.  182.  79): icmp_seq=1 ttl=41 time=174 ms
64 bytes from front-ams  .opera.  com (185.  26.  182.  79): icmp_seq=2 ttl=41 time=122 ms

Server not found
      Firefox can't find the server at www.opera.com.