Looking Glass Utilities - Router to Host Traceroute
Allows a user to view all router hops encountered in
the path between a Global Crossing node and a specified
URL address
Trying trace from node 'Cleveland, OH, US' to '204.15.20.26'
1 fe0-1-0-202-100M.ar1.cle1.gblx.net (64.214.8.97) 2.505 ms 0.502 ms
2 te1-2-10G.ar2.SJC2.gblx.net (67.17.109.106) 52.280 ms 57.238 ms
3 FACEBOOK-INC.ge-5-3-1.ar1.SJC2.gblx.net (64.215.26.170) 56.389 ms 52.161 ms
4 v531.bsw02.sctm.tfbnw.net (204.15.21.97) 56.289 ms 66.724 ms
5 www-b.facebook.com (204.15.20.26) 53.312 ms 53.588 ms
Command completed
If a returned message contains or is completely composed of ***, this is
probably the result of a filtering device (i.e. firewall) encountered along
the path being traced. The same explanation would apply for no output in
the case of a ping query.