Tonight I tested a Raspberry Pi model B running Raspbian as an OpenVPN-capable router. I used an Apple USB FastEthernet adaptor as the external interface. Results are disappointing. Pushing traffic through the VPN produced 90% CPU usage at about 8 Mbit with the CPU running at 700 MHz (no CPU overclocking). That’s far below what my tests with “openssl speed” produced.
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After my recent adventure with reverse-path filtering, I didn’t expect to see it again so soon. And then I took another look at a long-standing annoyance in our OpenVPN network.
I set up OpenVPN so our offices and laptops could securely access internal resources. This lets me print documents directly to another office, for instance. Or access web-based applications that we don’t make available to the public. Or remotely SSH into a PC and fix a problem. Read the rest of this entry »
At home I use a router flashed with DD-WRT v.24 SP1 with OpenVPN support to connect to the office private network. I upgraded from v.23 SP2 a few months ago. When I did so, I discovered that OpenVPN doesn’t seem to start automatically. Let’s fix it.