Quick update, Datanauts and Brotli?

Today I had the privilege in speaking on one of my most passionate topics, email! What was even more fun, is it was with the Datanauts crew! So that’s exciting and will be dropping in a few short weeks. I also came across another google compression system, last week was geutzli, this week it’s brotli. while geutzli is all about Continue reading Quick update, Datanauts and Brotli?

How to get an ‘A’ on your OWA Security scans in 3 steps!

Step 1) Download Nartac for IIS Step 2) Run and select Best Practices (Disables SSLv2/SSLv3) Step 3) Reboot That’s it, if you want the long and hard way, follow this technet article. What does this tool do? It makes registry changes to your schannel which applies to all TLS channels, either HTTPS, SMTPS, or STARTTLS (others if you have them)  

Postfix Outbound SPF Checker Idea

While working on figuring out a way to block email sent to and from external users, without blocking email to or from internal domain and allowing relay…. I had this idea:  What if I could check the SPF record of a domain when checking the from header of a domain.  This would allow me to dynamically permit emails from any Continue reading Postfix Outbound SPF Checker Idea

IPv6 OpenVPN Tunneling with Asus MerlinWRT and Postfix Smarthost over v6 Tunnels

Hey All, It’s been a while and I finally got around to updating my postfix cluster to send email over my OpenVPN tunnel with standard ports to my local zimbra server instead of using a non-standard port over the wan.  While I was at it, I figured I’d trying pushing IPv6 and here’s how that went.  A little backstory, my Zimbra Continue reading IPv6 OpenVPN Tunneling with Asus MerlinWRT and Postfix Smarthost over v6 Tunnels

Get IP Address of client without web scripts (like php)

Figured I’d do a quick post about this, I had the need to show my IP address (like https://www.icanhazip.com/ but internal).  I didn’t really feel like adding php to my existing nginx server, so here’s what I did. First) I create a new virtual-host with the internal server-name (or ip) of my nginx server, new document root of “ip” and a Continue reading Get IP Address of client without web scripts (like php)