Day: August 14, 2019

More tightening of the reigns on email has resulted in the inability to send emails with attachments.  This wasn't intentional.  I was following various guides and someone had some additional header_checks entries that I felt would help reduce spam.  In the middle of all the entries is the following: /^Content\-Transfer\-Encoding:(.*)base64$/ REJECT (base_64) This little line keeps all emails with attachments from going out.  In the /etc/postfix/header_checks file is where you put restrictions on incoming and outgoing email.  It is meant to keep mail users from getting spam and from forwarding spam emails with malicious content to others in the business or to others on the internet.  That line though can be dangerous if you aren't familiar with email and could cause you unintended grief if you just copy other's work,…

Some of these things just annoy you to death.  Suddenly I find that I am getting this error whenever I access my nextcloud instance, which I happen to be using more and more and more every day. I had been tightening down my security on my containers on the proxmox server and had discovered that I needed to put some exclusion IPs in fail2ban.  I did that for several containers and must have been interrupted by a customer or two and I know I never got back to it. I also put in fail2ban on several containers that were missing it and I ensured that certificates were valid and being updated properly by letsencrypt.  So, I was tightening the screws and sealing the doors so to speak, but interruptions are…