grs blog

Tag: ubuntu

  • how to install zimbra on ubuntu 16.04

    Guide for installing zimbra on ubuntu 16.04.
    If you use clouldflare or another dns service provider you can skip bind part.

    https://linoxide.com/ubuntu-how-to/setup-zimbra-suite-ubuntu-16/

  • install certbot on ubuntu 16.04

    On Ubuntu systems, the Certbot team maintains a PPA. Once you add it to your list of repositories all you’ll need to do is apt-get the following packages.

    $ sudo apt-get update
    $ sudo apt-get install software-properties-common
    $ sudo add-apt-repository ppa:certbot/certbot
    $ sudo apt-get update
    $ sudo apt-get install python-certbot-apache

    Reference: https://help.ubuntu.com/community/Repositories/Ubuntu#Adding_PPAs

  • protect zimbra from memcached attack

    protect zimbra from memcached attack

    Zimbra uses memcached and if not properly configured could lead to a vulnerable system.

    If you want to read more on memcached attack read this:

    https://blog.cloudflare.com/memcrashed-major-amplification-attacks-from-port-11211/

    How to resolve this vulnerability in 3 steps:

    1. Enable firewall on your server
    2. Setup zimbra specific rules
    3. Bind memcached to localhost
    4. Deny memcached port from localhost

    Let’s start.

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