INTRODUCTION TO FIREWALL ARCHITECTURE
The firewall is an extremely huge idea. Step by step, there are new enhancements accompanying better plan, new firmware, new programming updates, new elements, and so on. There is different design accessible in the firewall like screened have firewall engineering, bundle separating switches firewall design, double homed firewall engineering, screened subnet firewall design. According to the modern necessity, network plan, we want to pick reasonable firewall design.
The fundamental idea of a firewall is to shield the inner or hierarchical climate from any outer security assault. Also, three significant perspectives will characterize the design of the firewall, similar to the goal of the organization as far as the association perspective, the improvement capacity, and how we really want to execute it. While thinking of it as far as the equipment level, then we really want to consider the financial plan moreover.
Detail of Firewall Architecture:-
1. Scanned host firewall architecture:-
2. Packet filtering router firewall architecture:-
3. Dual homed firewall architecture:-
Presently the structural intricacy is more expanding on the grounds that we really want elite execution and less organization slack. In the past firewall design, we are utilizing the single organization interphase card. However, when we are utilizing such kind of firewall engineering, the stronghold host will contain the two different organization interphase cards. In this engineering, the one organization interphase card will associate with the outside organization, and the other organization interphase card will associate with the inside organization. Here, all the organization traffic will genuinely go from the firewall, which in the middle between in inner and outside network interphase cards.
Work Flow: In this architecture, there is no separate proxy server. In this firewall architecture, there are two different NIC’s are available. In one NIC, the external ISP connection will connect. In the second NIC, the internal network will connect. Once the traffic comes, the firewall will filter the traffic and pass it to the internal network. If the traffic is not valid, the firewall will drop the packet and not flow it further.
We have seen the uncut concept of the “firewall architecture” with the proper explanation. There is a number of firewall architecture available; we need to choose it as per our own requirements and budget. The firewall will track the traffic on the application level also.