Red Hat – Disable DNS Recursion (BIND)
Disable DNS Recursion KB ID 0000981 Problem I got a Tweet, to say the site was down. I checked and the VPS was off-line? So I powered it on and waited a few minutes. Linux is not one of my strongest technical areas so I did some Googling about what logs to check etc. When I looked in the var/log/messages log it was full of these, up to the point where it went down; Aug 7 03:51:52 MY-HOSTNAME named[490]: error (unexpected RCODE...
Webmin – Read User Mail Error ‘The mail server in the module configuration was not found on your system’
KB ID 0000885 Problem While setting up and configuring a new Postfix mail server, I attempted to use the Webmin ‘Read User Mail’ module, and got this error. Module Config Read User Mail The mail server set in the module configuration was not found on your system, You will need to adjust the configuration to use the correct server. Solution At first I thought I needed to enter a servername into the config. However it seems...
Postfix – Change The ‘Welcome Banner’
KB ID 0000907 Problem After my recent DNS troubles, I was checking my mail server’s (MX) records, and got a warning about not having any reverse lookup records (PTR) configured properly. I telnetted to the mail server on port 25, and saw it was responding with the servers host-name. I know my records are correct for the FQDN of the server, I just needed to change its welcome banner. Solution Change the Postfix Welcome Banner by...
Webmin – Upgrade Error – ‘Perl (Net::SSLeay) is needed’
KB ID 0001100 Problem I like to keep my CentOS server updated as much as I can, but the last couple of times I’ve gone to run the upgrade of the Webmin console, I’ve got this; error: Failed dependencies: perl(Net::SSLeay) is needed by webmin (version) Solution 1. As error messages go this is not a bad one, it obviously needs perl installing. So SSH into the server and execute the following command; yum -y install perl...