Install and configure a mailserver in docker container – Migrated to a new server 3 of 4

This is the third section in the 4 part series of migrating my server Install and configure the host machine Install and configure a database and webserver Install and configure a mailserver – we are here Install and configure vaultwarden Tie everything back to 1. for backups, misc, etc Dockerized mailserver We will install a dockerized mailserver, a sort of all in one that will run a full fledged secure mail service. There are many containers that can perform this and on my previous servers I used iRedmail. The main issue with most containerized mail solutions is that it requires… Continue Reading


Quickly deploy elasticsearch with docker

I needed a way to quickly stand up various versions of elasticsearch for testing. Sometimes just 1 instance was needed and at other time a small cluster and configure it with TLS and security settings. I spent way too much time installing and reinstalling the software on my vm and knew that this will not work well for me. So I set out to look for a light weight, portable, fast, re-produce-able solution that I can quickly stand up and delete and do it over and over. I decided to tackle this challange using docker-compose and developed a script that… Continue Reading


LDAP MD5 Cert Error on RHEL/CentOS 6.4+

With the update of nss-3.14.0 LDAP stopped using the MD5 signed certificate. nss-3.14.0 update deems that MD5 as unsecure. The change causes authentication of users using LDAP to fail. There are 4 possible ways to fix this problem 1) update the LDAP certificate to use other type of encryption than MD5 2) modify each kernel line in /etc/grub.conf to add support for MD5 and also in create nss.sh in /etc/profile.d in /etc/grub.conf add to the end of each kernel line systemd.setenv=NSS_HASH_ALG_SUPPORT=+MD5 in /etc/profile.d create nss.sh with export NSS_HASH_ALG_SUPPORT=+MD5 REBOOT 3) export the correct options to /etc/sysconfig/init in /etc/sysconfig/init add export… Continue Reading