Robin.Laing@xxxxxxxxxxxxxxx wrote:
Craig White wrote:
On Thu, 2005-10-06 at 15:14 -0500, Mike McCarty wrote:
I had some troubles loading a web page, so I
decided to try looking for connectivity.
I did this:
$ nslookup www.worldwideschool.org
Server: 151.164.11.201
Address: 151.164.11.201#53
Non-authoritative answer:
Name: www.worldwideschool.org
Address: 207.195.133.148
$ ping 207.195.133.148
PING 207.195.133.148 (207.195.133.148) 56(84) bytes of data.
From 209.120.242.6 icmp_seq=0 Packet filtered
From 209.120.242.6 icmp_seq=1 Packet filtered
From 209.120.242.6 icmp_seq=2 Packet filtered
From 209.120.242.6 icmp_seq=3 Packet filtered
What does "Packet filtered" mean?
Using "man ping" gave no results on this, and "info ping"
shows the same thing as "man".
----
Just a wild guess is that a router between you and the target is
preventing the icmp packets from progressing and thus, you are neither
getting a ping back nor a reject back from the target.
Craig
Give traceroute a try. It may work better in this case.
--
Robin Laing
Alternatively, nmap can be used to determine if a system is
up/accessible. My ISP filters ICMP to their servers so the only way I
can diagnose certain problems as being on my end or theirs is to use
nmap. I can traceroute to my own box if my ISP is up but I can't
traceroute to their gateway since it filters ICMP. nmap lets me see if
their gateway is accessible.
Cheers,
Dave
