[no subject]

> Before tracerouting, I do:
>
>      ping -c 1 yahoo.com
>
> If it says "unknown host" or fails to output its first line with the
> DNS resolution that normally looks like:
>
>      PING yahoo.com (216.109.112.135) from 10.11.12.13 : 56(84) 
> bytes...
>
> then DNS is down.
>
> Regardless of that, know the IP of a system on the Internet and then
> do a traceroute to its numeric IP, e.g.,
>
>      traceroute 216.109.112.135
>
> You may want to give the "-n" flag to not do DNS resolution.

When checking for connectivity problems three great IPs to remember:
	4.2.2.2, 4.2.2.3 and 18.18.18.18

These are three DNS servers which will serve up responses to anyone, 
anywhere. I doubt that's what the provider intended, however it does 
make troubleshooting easy.

Any other tricks of the trade?
-------------- next part --------------
A non-text attachment was scrubbed...
Name: PGP.sig
Type: application/pgp-signature
Size: 186 bytes
Desc: This is a digitally signed message part



</pre>
<!--X-Body-of-Message-End-->
<!--X-MsgBody-End-->
<!--X-Follow-Ups-->
<hr>
<!--X-Follow-Ups-End-->
<!--X-References-->
<ul><li><strong>References</strong>:
<ul>
<li><strong><a name="01197" href="msg01197.html">[ale] OT Speedfactory Problems Anyone?</a></strong>
<ul><li><em>From:</em> bmacleod at guc.usg.edu (Brian MacLeod)</li></ul></li>
<li><strong><a name="01222" href="msg01222.html">[ale] OT Speedfactory Problems Anyone?</a></strong>
<ul><li><em>From:</em> transam at verysecurelinux.com (Bob Toxen)</li></ul></li>
</ul></li></ul>
<!--X-References-End-->
<!--X-BotPNI-->
<ul>
<li>Prev by Date:
<strong><a href="msg01222.html">[ale] OT Speedfactory Problems Anyone?</a></strong>
</li>
<li>Next by Date:
<strong><a href="msg01224.html">[ale] OT: Scrum and Extended Development</a></strong>
</li>
<li>Previous by thread:
<strong><a href="msg01222.html">[ale] OT Speedfactory Problems Anyone?</a></strong>
</li>
<li>Next by thread:
<strong><a href="msg01230.html">[ale] OT Speedfactory Problems Anyone?</a></strong>
</li>
<li>Index(es):
<ul>
<li><a href="maillist.html#01223"><strong>Date</strong></a></li>
<li><a href="threads.html#01223"><strong>Thread</strong></a></li>
</ul>
</li>
</ul>

<!--X-BotPNI-End-->
<!--X-User-Footer-->
<!--X-User-Footer-End-->
</body>
</html>