Debian iptables Linux

kernel: conntrack: generic helper won’t handle protocol 47.

I was getting the following message in my log files on my Debian firewall. kernel: conntrack: generic helper won’t handle protocol 47. Please consider loading the specific helper module. The nf_conntrack_proto_gre module needs to be loaded to resolve this. modprobe nf_conntrack_proto_gre To load it automatically at boot, I created a new file (gre.conf) in /etc/modules-load.d […]

Bind9 Debian Linux opendkim Postfix

OpenDKIM on Debian 9.4 (stretch)

I spent a lot of time trying to get OpenDKIM to work on Debian Stretch. Having searched the Internet thoroughly, once again I found many different configurations, none of which actually worked for me. These are my various config files, with the domain name(s) swapped for “” and the ‘selectors’ swapped for “example-selector-name” If you […]

Debian Linux Linux audio mpd Music Player Daemon

mpd with the alsa equalizer plugin

UPDATED March 2023 (see below) Getting MPD to work with the ALSA Equaliser plugin I found a few sites with ‘howtos’ for this, although none of them worked for me. First thing to do is ensure your MPD installation is working properly, and playing music through your chosen device. If you have any problems getting […]

CentOS Debian ESXi Linux VMWare

Graphing disk temperatures with the Eluna Graph System

I have been using the Eluna Graph System for several years, as I like it’s simplicity. As per this post, I graph my ESXi disk temperatures so that I can keep an eye on them. Content of #!/bin/bash rrdtool create esxi_disks.rrd \ –start `date +%s` \ –step 300 \ DS:disk1:GAUGE:600:0:U \ DS:disk2:GAUGE:600:0:U \ DS:disk3:GAUGE:600:0:U […]