Clear PageCache only
# sync; echo 1 > /proc/sys/vm/drop_caches
Clear dentries and inodes
# sync; echo 2 > /proc/sys/vm/drop_caches
Clear PageCache, dentries and inodes
# sync; echo 3 > /proc/sys/vm/drop_caches
Seperate Private Key and Certificate file
#Generate certificates bundle file
openssl pkcs12 -nokeys -in server-cert-key-bundle.p12 -out server-ca-cert-bundle.pem
#Generate server key file.
openssl pkcs12 -nocerts -nodes -in server-cert-key-bundle.p12 -out server.key
Convert a PKCS#12 file (.pfx .p12) containing a private key and certificates to PEM
openssl pkcs12 -in keyStore.pfx -out keyStore.pem -nodes
Create a .pfx/.p12 certificate file using OpenSSL
openssl pkcs12 -export -out certificate.pfx -inkey privateKey.key -in certificate.crt
Src: https://www.sslshopper.com/article-most-common-openssl-commands.html
In the admin interface go to
Global Settings -> General Information -> Default domain and enter the name of your domain.
Users in that domain can now login without the @domain part.
You can get the correct version here at this URL:
https://developer.apple.com/download/more/
to download a your version of Xcode you want. Specifically, get 9.2.1. This is the recent version that works with mac OS Sierra.
Alternatively, this link works good too-
Before going into how to use the scp command, let’s start by reviewing the basic syntax. The scp utility expressions take the following form:
scp [OPTION] [user@]SRC_HOST:]file1 [user@]DEST_HOST:]file2
OPTION – scp options such as cipher, ssh configuration, ssh port, limit, recursive copy ..etc
[user@]SRC_HOST:]file1 – Source file.
[user@]DEST_HOST:]file2 – Destination file
Local file should be specified using an absolute or relative path while remote file names should include a user and host specification.
scp provides a number of options that control every aspect of its behavior. The most widely used options are:
-P Specifies the remote host ssh port.
-p Preserves files modification and access times.
-q Use this option if you want to suppress the progress meter and non-error messages.
-C. This option will force scp to compresses the data as it is sent to the destination machine.
-r This option will tell scp to recursively copy directories. Continue reading “SCP Command Syntax” »
You can make a general IP ban list. You need to go to Port forwarding / Destination NAT
It is important the rule is the first one, else the precending rules will overide the block. If you a list of country and/or IP CIR go to www countryipblocks net
In this tutorial, I use the hostname server1.example.com with the IP p 192.168.1.100. These settings might differ for you, so you have to replace them where appropriate.
I will add the EPEL repo here to install latest phpMyAdmin as follows:
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY* yum -y install epel-release
To edit files on the shell, I’ll install the nano editor. If you prefer vi for file editing, then skip this step.
yum -y install nano
Installing MySQL / MariaDB
MariaDB is a MySQL fork of the original MySQL developer Monty Widenius. MariaDB is compatible with MySQL and I’ve chosen to use MariaDB here instead of MySQL. Run this command to install MariaDB with yum:
yum -y install mariadb-server mariadb
Then we create the system startup links for MySQL (so that MySQL starts automatically whenever the system boots) and start the MySQL server: Continue reading “Install LAMP on Centos 7 with PHP 5.x/7.0/7.1/7.2” »
After you login in you Endian Appliance, simply issue the following command:
root@endian # netwizard
You will be asked a couple of questions. If the network has already been configured, the current values are shown: simply press Enter if you want to keep that value. The snippet below shows some possible values. Note that you should enter the network interfaces as eth1, eth2, and so on and not as br0, br1, and so on. IP ranges should be written in CIDR notation.
Network Configuration Wizard ---------------------------- Hostname? myappliance. Domain? mydomain RED interface type <STATIC/DHCP/GATEWAY>? DHCP RED device <eth0/eth1/eth2/eth3>? eth3 Green devices <eth0/eth1/eth2>? eth0 Green IPs (IP/CIDR)? 172.20.0.1/24 Orange devices <eth1/eth2>? eth1 Orange IPs (IP/CIDR)? 172.21.30.1/24 Blue devices ? eth2 Blue IPs (IP/CIDR)? 172.22.30.1/24 Enable SSH access <on/off>? on Allow access to ports 22, 80 and 10443 from any interface <on/off>? off
Continue reading “Endian Community (3.x)- network configuration using CLI- Netwizard” »
Management URL: https://192.168.0.15:10443 Green IP: 192.168.0.15/24 ----------------- 0) Shell 1) Reboot 2) Change Root Password 3) Change Admin Password 4) Restore Factory Defaults Choice: 0[endian]: login
root's password: Welcome to Endian Firewall Appliance release 2.5-0 (Deployset #0) [endian] root: bash
Continue reading “Endian Community (2.5.1)- Change the green IP address from console” »
First of all, why we choose three nodes and not only two? In any cluster, the number of nodes should be odd, so in the case of disconnection of a node, we assume that the highest group of servers has the fresh data, and should be replicated to the down node to avoid data loss. This is related only to resolve conflicts in data replication, we won’t loose data written only to the disconnected node.
This is used to avoid a circumstance called split brain, in which we can’t automatically choose which node has correct data. Think for example of a 2 node cluster where both nodes are disconnected from each other, and the same record is written to both nodes: who wins when they come back online? We don’t know, so split brain happens, and we have to manually decide wich record is the right one.
The number of nodes that is needed to determine wich part of the cluster has the right data is called QUORUM, in our case, the quorum will be 2. So we need 2 servers always be connected to each other. In case all three nodes will go down, we have a split brain and we must decide wich server should go in bootstrap mode manually, this is the procedure to determine wich will be the main server to resume from the split brain.
Configuring Percona XtraDB Cluster on Debian 8
This tutorial describes how to install and configure three Percona XtraDB Cluster nodes on Debian 8 servers, we will be using the packages from the Percona repositories.
Node 1 Hostname: mysql1.local.vm IP address: 192.168.152.100 Node 2 Hostname: mysql2.local.vm IP address: 192.168.152.110 Node 3 Hostname: mysql3.local.vm IP address: 192.168.152.120
On each host, modify file /etc/hosts as follows to ensure DNS will work correctly. Continue reading “Install Percona XtraDB Cluster for MySQL 5.7 on Debian 8” »
Step 1: Generating the certificate
First, let’s create a place to store the file.
mkdir ~/certificates cd ~/certificates
Generate CSR and private key.
openssl req -x509 -newkey rsa:4096 -keyout apache.key -out apache.crt -days 365 -nodes
It will ask for information for the certificate request. Complete with the appropriate information.
Country Name (2 letter code) [AU]: US State or Province Name (full name) [Some-State]: FL Locality Name (eg, city) []: Miami Organization Name (eg, company) [My Company]: My Company Organizational Unit Name (eg, section) []:
Common name should be your domain name or the server’s IP address. Also, fill in your email. Continue reading “Configure Apache With Self-Signed TLS/SSL Certificate on Ubuntu 16.04” »
Setup auto-login
Auto locking after login
