Tag Archives: iptables

Odd iproute2 gateway behavior with two gateways

After helping a frustrated yet patient Elvar I thought I better post about the situation we came across incase anybody else finds themselves in the same situation. Elvar started with all the correct elements to setup a functioning multrouting gateway. Two connections from two different providers, eth1, eth2. Running on an Ubuntu box with eth0 […]

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Iptables packet flow diagram

Here is the diagram I keep stuck to my wall for reference when dealing with iptables. I cannot remember what site I used as a reference when creating the diagram. The original was an ascii chart though. This is created in dia and exported to pdf too. Both attached for convenience. CC licensed as long as the original […]

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Multi gateway balancing with iptables

I have been testing load balancing via both iptables and ip route nexthop for a couple of days now.  They both work pretty well too. This only balances outgoing traffic as incoming traffic balanced via DNS RR and the firewall just returns the traffic on the interface it arrived on as per the previous post. […]

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