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Tag: iproute2

How to set up 2 network isolated Docker containers (front and back-end)

6th August 2021 by Adrian Giacometti

Making this work might sound crazy, but if Docker has to be comparable in functionalities already provided by other types of virtualization, then this has to work right? Ok, this is the scenario, is a classic one: I need to deploy in one Docker host, 2 isolated containers, let’s say front-end and back-end. The Linux …

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How to configure 1 Linux host with 2 NICs and 2 Default Gateways

5th August 2021 by Adrian Giacometti

Historically, it was not possible to have 2 default gateways in a Linux host.  You can SEND traffic to both NICs, but the reply will always come from the NIC which has the default gateway. This will generate asymmetric traffic and it will be denied in the network or by the originating host. Asymmetric traffic …

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