ISP question [ was traceroute , pls ]

[David A. Bandel]

On Fri, Oct 17, 2008 at 8:41 PM, Collins Richey <crichey at gmail.com> wrote:
> On Fri, Oct 17, 2008 at 8:10 AM, vu pham <vu at sivell.com> wrote:
>> Are the ISPs supposed to let the traceroute packets get thru ?
>>
>> I am on a server, which cannot traceroute all the way to the destination,
>> and I still be able to make the smtp connection to the destination.
>>
>> So I guess I cannot conclude about connections based only on the traceroute
>> path, is that correct ?
>>
>
> Just an aside. On the case that you happen to be on Comcast ...
> Comcast prevents anyone from completing a successful traceroute. You
> get out a few hops and it just dies.
>

Then change the port.  I can't believe they'd be blocking all udp
ports.  And if they are, you have the ability to traceroute via tcp
(and I'm sure they're not blocking port 80).

man traceroute

Ciao,

David A. Bandel
-- 
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