I am trying to access http://www.abc.xyz.com from my network, but not able to do so. However, http://www.xyz.com is opening fine in my browser. Asked a friend to open abc.xyz.com from his machine(in a different network), its opening fine. Checked my firewall settings as well. There's no such rule to deny the specific site or something that could be denying access to the sub domain. Kindly advise, how I can troubleshoot my problem.