Take a look at the PDF and video linked to for this presentation:
Tutorial: How to Accurately Interpret Traceroute Results http://www.nanog.org/meetings/nanog45/abstracts.php?pt=MTE4NSZuYW5vZzQ1&nm=nanog45 Kurt On Fri, Feb 24, 2012 at 09:53, Richard McClary <[email protected]> wrote: > Greetings! I am trying to create my own chart of what router (and the IPs > at each end) are in our WAN. > > > > I am in Illinois, and we have three locations in New York City. We all have > the same model firewall, similar if not identical WAN routers, and all are a > part of the Verizon Business network. > > > > From Illinois, I do a tracert command to a node in an NYC location, I trace > it though my switch and out my router. I then get three rows of asterisks > with “Request timed out” at the end. Then, magically, there is the remote > IP. I get the same results whether from a Win7 workstation or a Win2003 > server, whether as a domain user or an administrator. > > > > From NYC (either a person in NYC running the tracert, or me in an RDP > session), if I do a tracert back to a node in IL, I see the external IP of > each router (rather than the asterisks and the “timed out” returns). > > > > Why is it that, going one way, the external IPs are shown, but going the > other way, the intermediate steps show “Request timed out”? > > > > Thanks! > > > > > > The information contained in this e-mail, and any attachments hereto, is > from The American Society for the Prevention of Cruelty to Animals® (ASPCA®) > and is intended only for use by the addressee(s) named herein and may > contain legally privileged and/or confidential information. If you are not > the intended recipient of this e-mail, you are hereby notified that any > dissemination, distribution, copying or use of the contents of this e-mail, > and any attachments hereto, is strictly prohibited. If you have received > this e-mail in error, please immediately notify me by reply email and > permanently delete the original and any copy of this e-mail and any printout > thereof. > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ > ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ > > --- > To manage subscriptions click here: > http://lyris.sunbelt-software.com/read/my_forums/ > or send an email to [email protected] > with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin
