Category Archives: Networking

Oracle Linux 8: How To Access the GRUB

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Reboot or start the instance.

After the console screen is blank, there is only one or two seconds to press <escape key>. Press it several times as quickly as possible.

If escape was pressed successfully, the Boot menu will be displayed, if not try again.

Note that it is possible that instead of the Boot menu, a BIOS is displayed:

In that case, navigate to “Continue”, press Enter followed by Escape.

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MikroTik Router SNMP Configuration

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First, you need to access the console of your MikroTik router. On the prompt screen, enter the administrative login information. Factory default access information:

  • Username: admin
  • Password: (No password)

After a successful login, the console command-line will be displayed. Use the following command to enable the SNMP service on the MikroTik router.
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[admin@MikroTik] > snmp set enabled=yes

Use the following command to list the snmp communities available on the MikroTik router.

[admin@MikroTik] > snmp community print
Flags: * - default
# NAME ADDRESSES SECURITY READ-ACCESS
0 * public ::/0 none yes

As you can see, Mikrotik has a default SNMP community named PUBLIC.

The PUBLIC SNMP comminity has the ID number 0.

Use the following command to rename the PUBLIC snmp community. Continue reading “MikroTik Router SNMP Configuration” »

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PFSense SNMP Configuration

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Open a browser software, enter the IP address of your Pfsense firewall and access web interface. In our example, the following URL was entered in the Browser:

https://192.168.15.11

The Pfsense web interface should be presented. After a successful login, you will be sent to the Pfsense Dashboard.

Access the Pfsense Services menu and select the SNMP option. Continue reading “PFSense SNMP Configuration” »

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Allow Ping on PFSense WAN interface

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This article shows you how to allow ##ping## on the WAN side of your pfSense firewall. By default, ping to WAN address is disabled on pfSense for security reason. However, you may want to allow ping for different reasons, here is how:

# Login to pfSense
# Open Firewall > Rules.


# Change Interface to wAN.
# Change Protocol to ICMP. Continue reading “Allow Ping on PFSense WAN interface” »

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Observium Installer Script on Ubuntu 20.04 or Debian 11

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Automated Installation

Observium has an automated install script for use on Ubuntu and Debian systems. Using the automated installation script is as easy as downloading it, running it and answering a few simple questions, start with:

wget http://www.observium.org/observium_installscript.sh
chmod +x observium_installscript.sh
./observium_installscript.sh

You may need to install wget on bare installations

apt install wget

For manual installation you may read the link below-

https://docs.observium.org/install_debian/#manual-installation

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Build PPPoE server using PfSense

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Before building a PPoE system, it is estimated to assume that we’re building it on the following principal and prerequisite conditions-

  1. It’ll be a NAT PPPoE router
  2. At least 2 Interface we’ll be needing- 1 for WAN/Internet/Uplink and the other for LAN/PPoE user.
  3. A reserved LAN IP for PPPoE server itself (other than the LAN IP)
  4. Disable DHCP service if it’s running
  5. Prefereably disable DNS Resolver and enable DNS forwarder
  6. As of this pfsense/Netgate tutorial is being written the version is 2.6
  7. A

For easy understanding here goes my mockup instace WAN and LAN IP-

  1. WAN IP- 114.130.95.196/27, 114.130.95.193
  2. LAN IP- 192.168.1.1/24
  3. PPoE Reserved IP- 172.16.16.1
  4. DNS- 8.8.8.8
  5. LAN port is connected to the LAN switch or alternativey you can connect it to your PC
  6. Assuming you have an operting pfsense using static IP endpoint and you can use internet using static gateway configuration.

So here goes the steps-

Step 1: Create and Configure PPPoE Server:

  1. Go to services > PPoE Server section and click on ADD
  2. On the PPPoE Server Configuration page do the followings-

Continue reading “Build PPPoE server using PfSense” »

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Install Development Tool on CentOS and Debian

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Well, in my working domain I face these tools to be installed, so that most of the dependent tools or programs that need to be deployed later don’t face much of dependency issue. So here goes the installation process for both the OS.

On CentOS/RHEL system use the follwoing command (either one of it would work)-

Type the following yum command as root user:

# yum group install "Development Tools"

Continue reading “Install Development Tool on CentOS and Debian” »

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Install Proxmox VE 7 on Debian 11 (Bullseye)

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Step 1: Update Debian OS

Ensure your Debian 11 (Bullseye) operating system is upgraded.

sudo apt -y update && sudo apt -y upgrade

Once the upgrade process is complete, reboot the server

sudo systemctl reboot

Step 2: Set Proxmox Server hostname

Let’s set a hostname on the server

sudo hostnamectl set-hostname proxmox7node01.example.com --static

Replaceproxmox7node01.example.com with correct hostname you’re setting on your system. Get the IP address of the primary interface: Continue reading “Install Proxmox VE 7 on Debian 11 (Bullseye)” »

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