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 can be used to prevent forgery of the
HELO identity. My mail server uses SPF to check the Identity of the server. This is easier to configure and more reliable than checking the domain in the Mail from address. Even though I treat Neutral and Softfail policies as a Fail policy, I have not detected any false negatives. I verify both the address returned by the
PTR record for the host and the address in the
HELO command. This is primarily because the
PTR record is more likely to have a valid domain. Continue reading
My original intent in setting up BackupPC was to be able to backup my laptops. The mainly run Windows, and have a lot of shared files. Therefore I wanted a backup solution which handled de-duplication. BackupPC was just what I needed. I have already posted an article about Setting Up BackupPC on Ubuntu that includes setting up a server.
This article covers setting up BackupPC on Windows using
rsyncd as the protocol. (I tried using Samba, but didn’t like the results with Windows Home editions.) This is done with an extremely minimal
cygwin install available from the BackupPC site on SourceForge. The backups described here are not designed for bare metal recovery. They should include all the user’s files, and some of the configuration data for installed applications. Continue reading
I recently started to do regular backups of all my systems using BackupPC. It uses the
rsync protocol to limit the amount of data transferred during backups. Once the initial backup is done, future backups only need to copy incremental changes. This requires far less resources than other software I have used
This article covers setting up the server on Ubuntu and configuring backups for Ubuntu and OpenWRT. A future article will cover backing up Windows systems using an
rsyncd daemon process. Continue reading