Simon PainterSomewhere to keep things

February, 2015

Route summarisation

I found a very clever site that does route summarisation from a list. This is ideal if you dump out a copy of your routing table and want to see where the routes can be summarised. It’s also useful if you have subnets for a firewall rule that you want to consolidate. http://www.netmatics.net/FreeTools/IPv4SupernetTools/SupernetCalc

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Getting your underpants inside out over NAT

A colleague asked me to write a post on NAT and so this one is for him. I’m going to use a very basic three router lab to go through the common types of NAT and where they are used. First off there is the convention of inside and outside interfaces. The golden rule here is […]

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