Transparent Squid Proxy

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.

Manual networking for KVM

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

Remote Desktops with VNC and RDP

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

Implementing DKIM with Exim

This article was updated in February 2014 to reflect changes in policy and reporting options. The earlier ADSP (Author Domain Signing Practices) information has been removed. DomainKeys Identified Mail (DKIM) provides a method to confirm the origin of an e-mail. DKIM also provides some protection against tampering. Unlike SPF, this validation applies to the contents… Continue reading Implementing DKIM with Exim

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