Arranda Saputra

I am IT practitioner in real life with specialization in network and server infrastructure. I have years of experience in design, analysis, operation, and optimization of infrastructure solutions for enterprise-scaled network. You can send me a message on LinkedIn or email to arranda.saputra@outlook.com for further inquiry regarding stuffs that I wrote or opportunity to collaborate in a project.

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Configure VRRP in Cisco IOS Router

VRRP or Virtual Router Redundancy Protocol is the open standard version of Cisco’s HSRP. It is also used to provide redundancy of a gateway by using multiple routers, but since it’s an open standard then it can be implemented using routers from vendors other than Cisco. Most of VRRP logic are very similar to HSRP, […]
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Configure Static NAT in Cisco IOS Router

Network Address Translation or NAT is a mechanism of mapping local address on the inside interface of a router with global address on the outside interface. For outgoing packets, router will translate the source local address to a global address. Reversely, router will forward incoming packets for a global address to its local address. This […]
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Configure Dynamic NAT in Cisco IOS Router

Network Address Translation or NAT is a feature that enables access to the internet from a private network. Therefore, it becomes a mandatory requirement for any kind of network unless it is an isolated one. NAT works by translating the local address using global address as the packets moving back and forth towards the public […]
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Configure HSRP in Cisco IOS Router

HSRP or Hot-Standby Routing Protocol is a mechanism developed by Cisco to add redundancy at the gateway of a subnet. The idea of HSRP is using multiple routers to serve as a gateway using one virtual IP address. One of the routers will be designated as the active gateway, and if it’s become unreachable there […]
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Understanding Cisco IOS Command Line Modes

Cisco Command Line Interface (CLI) is the main interface where we will interact with Cisco IOS devices. CLI is accessible directly via console cable or remotely via methods such as Telnet/SSH. From here, we can do things such as monitoring device status or changing configuration. Cisco has divided its CLI into several different modes. Understanding […]
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Manage User Accounts and Passwords in Cisco IOS Devices

Managing user Accounts and passwords in Cisco IOS Devices is very important task. With several different user accounts, you can also set different privilege level for each one of them. Different privilege means different available commands that can be executed per user account. In this article, we will go deep on creating users accounts and all […]
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Enable SSH in Cisco IOS Router

SSH or Secure Shell is basically a secured method of accessing and sending commands to your router’s CLI through a network connection; without having to plug a console cable directly. Unlike standard telnet that sends data in plain-text format, SSH uses encryption that will ensure confidentiality and integrity of the data. There are two versions of […]