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Category: Installation Steps
Openstack – Train : Install OS (Ubuntu Bionic) and customize
Install and configure OpenLDAP Server
Configure hostname and FQDN for the VM/system which will be used for LDAP server. (Reference to example.com is to mask the actual usage) root@ldap:~# hostname –fqdn ldap.example.com root@ldap:~# cat /etc/hosts 127.0.0.1 localhost 10.1.2.22 ldap.example.com ldap The following lines are desirable for IPv6 capable hosts ::1 localhost ip6-localhost ip6-loopback ff02::1 ip6-allnodes ff02::2 ip6-allrouters root@ldap:~# Install OpenLDAP…
Adding ClamAV Anti-virus checks to existing Postfix, Amavis+Spamassasin configuration
Had an existing Postfix configurationup and running. Notes for bringing up the same available at https://www.sandeeprao.net/configuring-secure-mail-server-using-postfix-with-dovecot-spamassasin-postgrey-and-opendkim/ As I could add more vCPU and RAM to the VM, thought of adding anti-virus check on receipt of mails. As I had already configured amavis + spamassassin it was pretty straight forward, install the required clamav packages along…
NIC Bonding
Upgraded the lab by adding a new server, primarily hosting an NFS server. Upgraded all servers by adding 2 x 10G NICs in all the servers connected via Microtik CRS309 Desktop Router (Using SwitchOS and not RouterOS) – supports LACP. On the server-side decided to bond both the 10G NICs so that better network throughput…
Configuring secure mail server using Postfix with Dovecot, Amavis, Spamassasin, Postgrey and OpenDKIM
Prerequisite : https://www.sandeeprao.net/preparing-for-configuring-secure-mail-server-using-postfix-dovecot-spamassassin-and-opendkim/ Install required packages #apt install -y razor #apt install -y amavisd-new dovecot-core dovecot-imapd dovecot-lmtpd dovecot-mysql dovecot-sieve haveged mailutils mariadb-server opendkim opendkim-tools p7zip postfix postfix-mysql postgrey spamassassin Create require vmail user and group #groupadd -g 5000 vmail #useradd -g vmail -u 5000 vmail -d /var/vmail Create mailbox directory #mkdir -p /var/vmail #chown -R…
Preparing for configuring secure mail server using Postfix, Dovecot, Spamassassin and OpenDKIM
My requirements Have registered domain and a web server is already hosted for the same. Need is to add a ‘mail’ subdomain associated with a different public IP and set up a mail server. Have access to DNS management and will be configuring mail server on a VM on my server (hosted in a datacenter)…
dnsmasq : For my local network
Need was to have a DNS service serving my local network name resolutions. After surfing on multiple how tos, found dnsmasq would suffice my needs. Install dnsmasq #apt install -y dnsmasq Edit the configuration file and updated the following entries (uncomment if commented) # Never forward plain names (without a dot or domain part) domain-needed…
Highly available, Load balanced MariaDB cluster using Galera, HAProxy and Keepalived
Bring up 5 Vms and in each VM update /etc/hosts with following entries (to match requirements) 10.1.1.5 db1 10.1.1.6 db2 10.1.1.7 db3 10.1.1.10 haproxy1 10.1.1.11 haproxy2 Install mariadb in db1, db2 and db3. Install net-tools also, netstat would be handy for some checks. Stop mariadb service. apt install mariadb-server net-tools service mariadb stop Edit /etc/mysql/mariadb.conf.d/50-server.cnf…
Configure Postfix – Relay only!
Did not want to use any SMTP plugin in the WordPress installation. Reading through the posts on the net to achieve mails being sent from WordPress the wp_mail() is used and it attempts to delivery the mail to port 25 of localhost. So decided to configure Postfix to accepts mails for delivery to be relayed…