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About Me

MTIN is a full service consulting firm with over 15 years of experience. We specialize in ISP networks.  Other clients include enterprise, education, government, and SOHO.  We have Mikrotik, Cisco, and other certified engineers on staff.

Random Cisco NAT Tips

To view active NAT translations in the NAT table do:
show ip nat translations

To Debug nat:
debug ip nat

Clear NAT mappings:
clear ip nat [...]

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1:1 Nat setup with Mikrotik

Purpose: This document encompasses the procedure on configuring a 1:1 nat on a mikrotik CPE.

Definitions for the Document:
Public IP. An Internet routable IP address.
Static IP address: An Ip that does not change. This can either be a private or a public IP address.
Private IP address. A non public routable IP address.  [...]

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IPv4′s Last Day: What Will Happen When There Is Only IPv6?

At the ARIN XXV policy meetings held here this week, ARIN CIO Richard Jimmerson explained how the organization expects to know when the final IPv4 address is gone.

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“We will run out of IPv4 address space and the real difficult part is that there is no flag date. It’s a real moving date [...]

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Natting at each POP

As IPV4 space becomes more and more scarce small operators are faced how to make their IP space stretch as far as they can.  One way to do this in a routed WISP environment is to do NAT translation on a per pop basis.  I have put together a Visio diagram to illustrate this.

The router at [...]

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