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[all variants] Server no longer reachable from the outside after second interface is configured

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http://ubuntuforums.org – Hey everyone, I have a server that should be connected to two networks. One where it is connected via a router to the internet and another one connected to a local network. I make certain ports of the server available in the internet, via port-forwarding. As soon as I configure the second interface (eth1), which has a static IP configuration, connection attempts from the internet fail. The ports are open but no data is transferred. In the network of the router the server is still reachable normally. Here is the /etc/network/interfaces of the server: Code: ## This file describes th (Hardware)