I added DKIM to our postfix setup, as I was seeing more and more rejections on emails that we forward to gmail. Not sure if they are getting rejected because we didn’t have DKIM, or because the original sending site didn’t have DKIM.

I have a server room on the other side of campus, and I’d like to be able to reboot my servers (and debug any problems) from my office or from home. Below is what I did to set up remote console access with ipmi. All servers are running either Debian or OpenBSD.

I just struggled to get mailman3 set up on a Debian 11 (Bullseye) server, so below are some hints and tips. I was converting an old server running mailman2, and thought it would be easy. Took me more than a few tries and the documentation seems all over the place on this one.

This post contains everything I did to put up a static website on aws, using S3, Route53, CloudFront, and Certificate Manager.

I wrote a python reference doc for our intro Comp Sci students, and I wanted to host the repo here on github, but also host the static website, which is written in asciidoc.

Notes on setting up an LDAP server for a small CS department.

I am the sysadmin for a small Computer Science department. Last summer (2020) one of our students (Jake Chanenson) helped us set up haproxy as a load-balancer for incoming ssh connections. This page describes our setup.

Here are my notes from making this site. I will add to it as I learn more jekyll and how the github.io stuff works.

I wanted to use the multimap module in rspamd to block specific email addresses and domains, as well as allow certain email addresses, ip addresses, and domains.

You’ll find this post in your _posts directory. Go ahead and edit it and re-build the site to see your changes. You can rebuild the site in many different ways, but the most common way is to run jekyll serve, which launches a web server and auto-regenerates your site when a file is updated.