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Re: Just from curiosity....

  • From: Ehud Gavron
  • Date: Sat Jan 18 11:19:44 1997

ftp://ftp.aces.com/software/traceroute/traceroute_new.c
ftp://ftp.aces.com/software/traceroute/0_readme.txt

This BETA version incorporates two new changes:
	1: It will show a !A for administratively-prohibited packets (see below)
	2: It will allow modification of a line terminator from standard <LF>
	   to anything else, allowing, for instance, dynamic access from
	   web browsers (see www.opus1.com/www/traceroute.html)

Feel free to test.  

Ehud




>You see this behavior because your traceroute program does not
>understand the ICMP "administratively prohibited" (ICMP type 3, code
>13 - defined in RFC 1812) messages being sent back to it from
>cpe1.reston.mci.net.

>Cisco routers typically return ICMP messages of this nature to the
>source of traffic which is being blocked by a traffic-filtering
>ACL on the Cisco router.


>                                - roy -

> -------------------------------------------------------------------------
>|           roy alcala            |                  MCI                  |
>|         IP Development          |          2100 Reston Parkway          |
>|           roy@mci.net           |        Reston, Virginia  22091        |
>|    beep-roy@mci.net (pager)     |            (703) 715-7425             |
>|   (800) SKY-PAGE PIN 1633689    |            (703) 715-7066 FAX         |
> -------------------------------------------------------------------------

>>
>>
>>Anyone have any insights on what causes the following interesting data
>>from a traceroute?
>>
>>10  cpe1-fddi4-0.Reston.mci.net (204.70.176.102)  39 ms  36 ms  38 ms
>>11  * cpe1-fddi4-0.Reston.mci.net (204.70.176.102)  36 ms *
>>12  cpe1-fddi4-0.Reston.mci.net (204.70.176.102)  38 ms * *
>>13  cpe1-fddi4-0.Reston.mci.net (204.70.176.102)  41 ms * *
>>14  cpe1-fddi4-0.Reston.mci.net (204.70.176.102)  194 ms * *
>>15  cpe1-fddi4-0.Reston.mci.net (204.70.176.102)  36 ms * *
>>16  cpe1-fddi4-0.Reston.mci.net (204.70.176.102)  36 ms *  37 ms
>>17  * cpe1-fddi4-0.Reston.mci.net (204.70.176.102)  37 ms *
>>18  cpe1-fddi4-0.Reston.mci.net (204.70.176.102)  37 ms *  35 ms
>>
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