This article provides a quick overview of the DNS records required for an email server and presents a minimal sample configuration. The example assumes that you are running servers for both email and the web. Comments indicating the changes if you are using a third-party provider are provided.
How to provide DNS server addresses to IPv6 clients using Router Announcements.
SPF (Server Policy Framework) is a simple means to limit the ability of others to forge your identity in email. I first implemented it after a forged identity under my domain was used to send Spam. Once SPF was configured, the bounce messages quickly dropped off. Although not as frequently implemented as sender address checks, SPF […]
Replacing 6to4 tunnel with 6in4. IPv6 enabling Bind, Exim, SPF, Squid, and updating Databases containing IP addresses.
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 […]
I administer an email server for a couple of domains and a few users. Incorrectly configured email servers result in a lot of my administration work. Due to improper configuration, far too many servers look like Spam servers. A little effort in setting up your server can make my life easier, and increase your chance […]
Now I have replaced my old firewall with OpenWRT, I needed to enhance the configuration of dnsmasq to support the network. The old Ubunutu based firewall was already running dnsmasq, as does the DNS server on the LAN. I run a mixed network with wired and wireless clients on separate address ranges. DHCP services are […]