Re: Just from curiosity....

[Ehud Gavron <GAVRON () ACES COM>]

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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