Google has announced a sunset for SHA-1 certificate signatures in Chrome. SHA-2 (aka SHA-256, SHA-384, and SHA-512) is the remaining option for certificate signatures. I decided to upgrade my certificates to SHA-2 (256 bits). However, when I tried to use tinyca2 to generate a SHA-2 certificate, I found it was not supported. As tinyca2 is… Continue reading Adding SHA-2 to tinyca
How to provide DNS server addresses to IPv6 clients using Router Announcements.
Back up Windows PCs and Laptops using BackuPC. Includes installing rsycnd on Windows.
Set up a BackupPC Server on Ubuntu. Includes configuration of Linux and OpenWrt clients using rsyncd.
Replacing 6to4 tunnel with 6in4. IPv6 enabling Bind, Exim, SPF, Squid, and updating Databases containing IP addresses.
Over the holidays, I had a user experience and attempted browser hijacking. It appeared to have bypassed my squid proxy. My updated configuration now sends all web access via squid. The old firewall rules, that allowed direct access to the Internet, have been replaced with a transparent Squid proxy. This runs on my existing Squid Proxy using another port.
I found the networking configured by libvirt (KVM) did not allow me to firewall the network as I desired. I use Shorewall for firewalling, and DNSMasq for internal DNS and DHCP. After a little experimentation, I found that I could configure Ubuntu to create the network. This allows me to get a reliable firewall configuration with a… Continue reading Manual networking for KVM
I find it useful to have a remote desktop to my Ubuntu systems. On secure connections, I have been using VNC via xinetd. Connections with xrdp where possible, but it wasn’t launching the desktop for the connection. For secure terminal connections, I stick with ssh. All these connections have a login at the start of the… Continue reading Remote Desktops with VNC and RDP
To enable for Internet chat I set up Google Chat and Skype. My firewall rules have been extremely restrictive with only known and approved services allowed to connect. Google Chat installed with no noticeable impact to the firewall. Things did not go so well with Skype. The installation of Skype resulted in lots of warnings… Continue reading Firewalling Google Chat and Skype
Squid is a proxy service for HTTP and other requests. This article covers installing it and configuring it to run on Ubuntu as a transparent proxy. This documentation includes configuring Web Proxy Auto-Discovery (WPAD) via DHCP and DNS. I run a heterogeneous configuration. This provided a number of challenges as various implementations of WPAD were encountered. Each seems to… Continue reading Setting up Squid Proxy on Ubuntu