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I would like to block all traffic on my ubuntu server with iptables and them allow only the protocols : HTTP, HTTPS, PPTP, L2TP, SSTP and OpenVPN

I have tried many ways to do this, and I would like to have a clean start, so if someone can give me an idea what is the best way to do this I will really appreciate.

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  • I thought you just use the -p for protocol and then http or tcp...
    – user524804
    Mar 30, 2016 at 18:04

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