Linux Routing Memos

These are just small hints and memos what to do on a Debian Linux setup. This is not a complete guide on doing a secured routing environment with Linux. /etc/sysctl.conf: net.ipv4.ip_forward=1 Configure /etc/network/interfaces iptables -t nat -A POSTROUTING -o <upstream_interface> -j MASQUERADE apt-get install iptables-persistent apt-get install iftop apt-get install conntrack conntrack -L -s 10.11.1.10 […]

NetBox Install on Debian 9

When installing NetBox on Debian 9 and Apache, the instructions in http://netbox.readthedocs.io/en/latest/ are fine, just some small additional operations are needed. The libapache2-mod-wsgi-py3 package needs to be installed as well, otherwise you will get errors about the “WSGIPassAuthorization on” command when starting Apache [this has later been addressed in commit b917e8d] Disable the “000-default” site […]

TLS Certificates in Debian and Apache

Adding TLS configurations in Apache: cat > /etc/ssl/private/myserver.key chmod 0640 /etc/ssl/private/myserver.key chgrp ssl-cert /etc/ssl/private/myserver.key cat > /etc/ssl/certs/myserver.crt cd /etc/apache2/sites-available cp default-ssl.conf myserver-ssl.conf vi myserver-ssl.conf – add ServerName if needed – RedirectMatch ^/$ https://myserver.mydomain.com/appname (if needed) – edit SSLCertificateFile and SSLCertificateKeyFile a2ensite myserver-ssl a2enmod ssl vi 000-default.conf – add ServerName if needed – Redirect / https://myserver.mydomain.com/ […]

Visual Studio Code Customizations

My customizations in Visual Studio Code: Cygwin in Integrated Terminal { // start bash, not the mintty, or you’ll get a new window “terminal.integrated.shell.windows”: “C:\\cygwin64\\bin\\bash.exe”, // Use this to keep bash from doing a ‘cd ${HOME}’ “terminal.integrated.env.windows”: { “CHERE_INVOKING”: “1” }, // Make it a login shell “terminal.integrated.shellArgs.windows”: [ “-l” ] } (source: https://stackoverflow.com/questions/46061894/vs-code-cygwin-as-integrated-terminal) Quick […]

Zabbix Components and Ports

Zabbix monitoring system consists of components that communicate with each other. Here is a summary of the TCP ports and some configuration characteristics of various connections. Active agent: The Zabbix agent periodically asks the Zabbix proxy (or Zabbix server, if configured to use the server directly) for the list of items that should be collected, […]

Installing AWS CLI on Cygwin

To get AWS CLI working in Cygwin: Install “python2-pip” with the Cygwin installer (and accept whatever dependencies it brings) Run “pip2 install awscli“ See what you have: “aws –version“, and continue with the usual “aws configure” procedure. Using AWS CLI is not very fast in this setup however. For example, showing specific Virtual Private Gateway […]

How to Fix GoToMeeting or Skype for Business on Second Monitor

[Update on 2018-08-31: The instructions below are probably not useful anymore after several Windows 10 or other software updates. Things look much better nowadays, even though many software still have problems with differing font scaling factors. I still feel sorry for the many developers out there who apparently don’t have sufficient possibilities to test software […]