March 2025

Get faster OpenVPN on FreeBSD by enabling DCO – easily done

Leave a Comment / FreeBSD, Open Source, OpenVPN / By /

I’ve been configuring a new gateway server for use in my basement data center (home lab). I had recently read about DCO and FreeBSD’s opvn device. DCO (Data Channel Offload) let’s OpenVPN use the encryption features available in many CPUs. In my previous post, I checked; my OpenVPN server and most of the clients are DCO-capable. I decided to try it. I found documentation lacking as to how to use it. I took […]

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Problems with OpenVPN when server is FreeBSD 14.2 and client is 14.1

Leave a Comment / Bacula, FreeBSD, Open Source, OpenVPN / By /

After replacing an existing gateway with new hardware, the OpenVPN connections had issues. The clients would connect, but non-trivial amounts of traffic would cause errors. This post contains a workaround, by upgrading the OS. I would like to know the cause. In this post, these are the version in use: FreeBSD 14.2 (for the OpenVPN server and some of the clients) FreeBSD 14.1 (for some of the clients) OpenVPN 2.6.13 (on the server

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Invoking ddclient from dhclient to update 3rd party dynamic dns hosts on FreeBSD

Leave a Comment / DNS, FreeBSD / By /

In this post: FreeBSD 14.2 ddclient-3.11.2 Ansible playbook for ddclient: https://github.com/dlangille/ddclient/ forked from https://github.com/hammadrauf/ddclient/ In my previous post, I configured dhclient to setup my Hurricane Electric tunnel and notify HE of same. First attempt: [12:39 gw01 dvl ~] % sudo ddclient [12:47 gw01 dvl ~] % tail /var/log/messages … Mar 6 12:47:50 gw01 ddclient[52929]: WARNING: ” is not a valid IPv4 or IPv6 address Mar 6 12:47:50 gw01 ddclient[52929]: WARNING: found neither IPv4

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When my home DHCP address changes, I want stuff done

Leave a Comment / DHCP, Firewalls/Gateways, IPv6, Networks / By /

I recently moved from an appliance to a FreeBSD 14.2 gateway. In this post: FreeBSD 14.2 gw01 gw01 photos These are the main things I need done when my IP address changes: restart OpenVPN restart my Hurricane Electric IPv6 tunnel with the new IP address – written Tell HE.net about my IP address change – written Notify OpenDNS.com about my IP address change Update a dynamic DNS entry so my VPN clients can

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