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Turkey Machine 10-06-2010 12:08
Traceroute lookup reversing the IP address
 
Hi guys, wonder if the nerds out there can help with the following query that's left me a bit braindead.

What could be the cause of an IP address being reversed when it has a traceroute performed against it?

As an example, IP address 208.69.34.231 comes up in the traceroute as 231.34.69.208.

This is having problems with domain resolution for a SMTP server one of my colleagues uses to work from home.

And just to clarify, this is happening with DNS lookups, not just traceroutes.

Any ideas chaps and lasses?

Thanks in advance

TM

Kymmy 10-06-2010 12:13
Re: Traceroute lookup reversing the IP address
 
Fine here

Code:
C:\Users\Kymmy>tracert 208.69.34.231

Tracing route to google.navigation.opendns.com [208.69.34.231]
over a maximum of 30 hops:

  1    1 ms    <1 ms    <1 ms  192.168.0.1
  2    8 ms    9 ms    8 ms  10.136.124.1
  3    9 ms    9 ms    10 ms  lutn-cam-1b-v113.network.virginmedia.net [80.
18.145]
  4    22 ms    23 ms    38 ms  lutn-core-1b-ae1-0.network.virginmedia.net [1
182.174.189]
  5    67 ms    31 ms    13 ms  nrth-bb-1b-as5-0.network.virginmedia.net [213
5.175.153]
  6    70 ms    82 ms    99 ms  manc-bb-1a-ae2-0.network.virginmedia.net [212
.163.81]
  7    41 ms    60 ms    67 ms  212.187.136.125
  8    25 ms    26 ms    28 ms  ae-4-4.ebr1.London1.Level3.net [4.69.133.102]
  9  105 ms    84 ms    85 ms  ae-1-51.edge4.London1.Level3.net [4.69.139.74
 10    96 ms    17 ms    15 ms  195.50.122.86
 11    44 ms    28 ms    19 ms  google.navigation.opendns.com [208.69.34.231]

Trace complete.

Turkey Machine 10-06-2010 12:20
Re: Traceroute lookup reversing the IP address
 
Yep, and at work that's pretty much the result I get (VM cable connection, wahey *drops*).

The problem seems to be with this one connection from home. The router was rebooted, the PC rebooted, but still the same problem occured.

:-/

Kymmy 10-06-2010 12:24
Re: Traceroute lookup reversing the IP address
 
OS?

Turkey Machine 10-06-2010 12:32
Re: Traceroute lookup reversing the IP address
 
Windows 7.

Kymmy 10-06-2010 12:41
Re: Traceroute lookup reversing the IP address
 
Same as what my tracert was on

Turkey Machine 10-06-2010 12:57
Re: Traceroute lookup reversing the IP address
 
I have a feeling it's related to a faulty DNS lookup, on further examination, but there's sweet FA I can do about it now....... :rolleyes:

Ignitionnet 10-06-2010 13:54
Re: Traceroute lookup reversing the IP address
 
Quote:
Originally Posted by Turkey Machine (Post 35038270)
Hi guys, wonder if the nerds out there can help with the following query that's left me a bit braindead.

What could be the cause of an IP address being reversed when it has a traceroute performed against it?

As an example, IP address 208.69.34.231 comes up in the traceroute as 231.34.69.208.

This is having problems with domain resolution for a SMTP server one of my colleagues uses to work from home.

And just to clarify, this is happening with DNS lookups, not just traceroutes.

Any ideas chaps and lasses?

Thanks in advance

TM
This is fine, apart from one thing - they missed a bit out.

They put in a pointer record to pass a forward-confirmed reverse DNS check however they forgot the .in-addr.arpa bit at the end.

Get him to flush his DNS cache, if the correct DNS information has been input since it should then work ok.


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