IT Network

1. Overview   In the previous article we had implemented a IPSec VPN site-to-site between head office and branch office. Normally as the business grow, there are more branch offices to be created. So, we need to configure another IPSec VPN site-to-site between head office and the new created branch…
Read more

1. Overview   A Site-to-Site IPSec VPN is used to connect between two Local Area Networks (LANs) of a company offices or branches which are geographically separated. The data traffic flows between each location or site is over the internet or public network with a secure VPN tunnel. An advanced…
Read more

1. Overview   To bring a VPN site-to-site tunnel up and running, both firewalls at each site must have the same configuration and the network administrators at both sites must work together closely to accomplish that. Mostly each site locates in different geographical areas which make us hard to talk…
Read more

1. Overview   Network Address Translation (NAT) is mostly happen on Cisco ASA firewall. NAT Configuration on ASA is completely different from NAT configuration on Cisco router. Likewise, even different version of ASA firewall appliance have different NAT configuration, such as old version 8.4 and new version 9.x. In this…
Read more

1. Overview   Access Control List (ACL) is one of the main features of Cisco Adaptive Security Appliance (ASA). It capables of filtering the traffic flow across the connected interfaces of Cisco ASA firewall Appliance and prevents a certain traffic from entering or exiting a network. This article will show…
Read more

1. Overview   Basically, to work with Cisco ASA firewall appliance, you need to understand the logic of security levels which is assigned to ASA physical or logical sub-interface and how it works. This understanding is very important to work with Access Control List (ACL)  to control the traffic flows…
Read more