Re: Cisco Traceroute and UDP src port range.

Just filter the unreachables back...
...but why would someone want to do that ???

Sergey Khalavchuk @ 1/05/2009 8:46 -0200 dixit:
> two or three days ago i was asked to filter outgoing traceroute packets.
> matching on source UDP port is like a solution (if you know what ports
> are used) :)
>
> On Fri, May 1, 2009 at 2:17 PM, Dale Shaw <dale.shaw_at_gmail.com> wrote:
>> I reckon any task that asked you to do that wouldn't actually require
>> you to know the range :-)
>>
>> (in other words, it'd be a reflexive ACL or CBAC task where return
>> traffic associated outbound probes would be automagically permitted
>> based on a state table entry.)
>>
>> cheers,
>> Dale
>>
>> On Fri, May 1, 2009 at 1:57 PM, CCIE RS <cc13rs_at_gmail.com> wrote:
>>> Thanks for the Link Scott!
>>> I am asking this question form the perspective of LAB exam where, If asked
>>> to configure an ACL (Somewhere in the path), but still allow outgoing
>>> traceroute Packets.
>>> I know the UDP port range starts form 33434, but I am clueless about the
>>> upper limit. :(
>>>
>>> -CC13RS.
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>

-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net