[afnog] Routing Issue - Please Help

[Austin Uwudia]

Hi Raymond,

I posted the question when it appeared I hit a brick-wall trying to figure
out what the issue was. I was able to trace IP on my laptop back from
internet, but when I checked www.whatismyip.com, it shows the interface IP
of the router and not the IP on my laptop.

 

I am using Mikrotik and multiple networks are terminated on the box in load
balancing/sharing format; and the IPs on the LAN side are NATed. I took a
look at the Nat rule and found that I did not make explicit the rules per
subnet. I did and the issue was resolved.

 

Regards,  

 

Austin Uwudia

 

 

From: afnog-bounces at afnog.org [mailto:afnog-bounces at afnog.org] On Behalf Of
Raymond Macharia
Sent: Tuesday, August 03, 2010 1:16 PM
To: surfer at mauigateway.com
Cc: afnog at afnog.org
Subject: Re: [afnog] Routing Issue - Please Help

 

Hi Dewole,just a follow on question, when you say  "the IP subnet is
reachable from the internet", please clarify, for example does it mean you
are able to trace an IP in that subnet from the internet back to your router
(for example from www.traceroute.org)?
Raymond Macharia



On Thu, Jul 29, 2010 at 10:15 PM, Scott Weeks <surfer at mauigateway.com>
wrote:



--- auwudia at swifttalk.net wrote:
From: "Austin Uwudia" <auwudia at swifttalk.net>


We recent advertise a /23 subnet of our block with our provider through BGP.
The process of BGP has been concluded and the IP subnet is reachable from
the internet. However, I just realized that the IP address is working
because of the existing NAT rule on the Mikrotik router.

I have as follows:

WANT interface = 82.128.x.x
LAN interface = 204.16.x.x/26 (existing NATed subnet)
LAN interface = 41.76.x.x/23 (the newly advertised subnet)

I have 41.76.x.x on my laptop and I can reach internet and be reached from
internet. However, when I check www.whatismyip.com, it shows my IP as the
WAN interface IP of the router i.e. 82.128.x.x.

Can anyone kindly help me out on how to make this subnet fully routed? I am
really in a dire strait.

-------------------------------------------------------


I'm not sure I follow completely, so please excuse me if I accidentally make
a silly comment...  :-)

Is the WAN interface a /30?

What does whatismyip.com show when you have a 204.16.x.x address on your
laptop?

I am not sure what you mean by "make this subnet fully routed".  It sounds
like it is fully routed ("the IP subnet is reachable from the internet") and
is using the WAN IP as the NAT address.  Do you mean to make the /23 a
non-NAT'd address?

scott













































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