Install XRDP on CentOS 7 Rumi, September 12, 2023 Prerequisites: XRDP is an open-source version of the Microsoft Remote desktop Protocol server. It enables operating systems besides Microsoft Windows to offer a fully functional remote desktop experience. The prerequisites for the installation include: Before all else, install Gnome GUI on CentOS 7 or RHEL 7. Then install and configure… Continue Reading
Install mail server on Ubuntu or Debian Rumi, September 12, 2023 Disclaimer: This howto is tested on Ubuntu 16, 18, 20 and Debian 10, 11 edition. Installing and configuring postfix Step 1 » Assign static IP and hostname and add a host entry for the host name . Assign hostname in /etc/hostname mail.tweenpath.net Add a host entry in /etc/hosts 192.168.1.10 mail.tweenpath.net… Continue Reading
Limit Sending/Receipt Email Per day, Per Week or Per Month Rumi, September 12, 2023 For activating module accounting, open webui via browser http://>zimbra-host>:7780/webui/index.php choose accounting | configure. Select add, and fill with the following example Name : Rate limit perday Link to policy : Default Track : Sender:@domain . You can choose with your choice Period : Daily Message Count Limit : 5000 Message Cumulative Size Limit :… Continue Reading
Install PolicyD on Zimbra 8.5 or 8.8 Rumi, September 12, 2023September 12, 2023 Policyd have module quotas. This module can use for limit sending/receipt email. As example just allow sending/receipt email 200 emails/hours/users. If your email server attacked by spam or compromised password some users and used by spammer, the maximum email can be sent as many as 200 emails per hour. This policy will safe your… Continue Reading
Install and Configure Fail2Ban for Zimbra on CentOS 7 Rumi, September 12, 2023 Below is how to install and configure Fail2Ban for Zimbra. In this guidance, I use CentOS. Please adjust python-pip version if using another OS 1. Install pip yum install python3-pip 2. Install dependencies required by Fail2Ban pip3 install pyinotify pip3 install dnspython 3. Download and extract Fail2Ban cd /tmp/ wget… Continue Reading
Zextras Modern Theme for Zimbra web interface Rumi, September 12, 2023 First, you must register to get a download link: zextras-theme-zimbra-interface. Then, you will receive instructions for installing the new Zextras theme For Ubuntu users Download the package from your Zimbra server using the following command: wget https://link-download-from-zextras/zextras-theme-ubuntu.tgz Note: Change link-download-from-zextras with the link received in the email Extract the package you… Continue Reading
Remove VirtualBox from Linux Rumi, September 3, 2023 Step 1: Check the VirtualBox Version (Optional) First, check out the Virtualbox installed version by specifying the application package name as “vboxmange” name with the “version” flag: $ vboxmanage –version The Virtualbox installed version is “6.1.38”. Step 2: Uninstall Virtual Box Use the default package manager alongside the “–remove” and… Continue Reading
Enable IPTables on Rocky Linux 8 Rumi, September 2, 2023 Disabling firewalld You can’t really run the old iptables utilities alongside firewalld. They’re just not compatible. The best way to get around this is to disable firewalld entirely (no need to uninstall it unless you want to) , and reinstall the iptables utilities. Disabling firewalld can be done using these… Continue Reading
IPTables D-NAT Firewall Rule Rumi, September 2, 2023 # Generated by iptables-save v1.3.5 on Tue Oct 28 23:57:58 2014 *filter :INPUT ACCEPT [2590:547311] :FORWARD ACCEPT [11426:731834] :OUTPUT ACCEPT [3989:328501] -A INPUT -i eth0 -j ACCEPT COMMIT # Completed on Tue Oct 28 23:57:58 2014 # Generated by iptables-save v1.3.5 on Tue Oct 28 23:57:58 2014 *mangle :PREROUTING ACCEPT… Continue Reading
Create A Network Bridge on CentOS 7 Rumi, September 1, 2023 Install Module CentOS 7 comes with bridging module loaded on system boot by default. Use the following command to verify whether the module is loaded or not. # modinfo bridge filename: /lib/modules/3.10.0-327.el7.x86_64/kernel/net/bridge/bridge.ko alias: rtnl-link-bridge version: 2.3 license: GPL rhelversion: 7.2 srcversion: 905847C53FF43DEFAA0EB3C depends: stp,llc intree: Y vermagic: 3.10.0-327.el7.x86_64 SMP mod_unload modversions… Continue Reading