Firewalls are the network security systems, may be either the hardware-based or software-based, which make use of rules for controlling the incoming as well as outgoing network traffic. Firewalls act as barriers between trusted networks and untrusted networks. Firewalls usually control the access to various resources of particular networks via positive control models. A firewall could be implemented as both software and hardware, or even a combination of these both. The network firewall is often made use for preventing any unauthorized users attempting to access these private networks that are connected to Internet, specifically the intranets.
Firewalls usually provide a broad spectrum of cloud data protection against any network related threats. Also, as an integral part of such protection, firewalls eve provide some amount of limited visibility into the usage of cloud data etc., For instance, though such conventional cloud security solutions might have difficulty towards the mapping URLs users-access to these cloud services, but still these can be used to track cloud data access over corporate networks. Some of the users tend to use their network-based security solutions for terminating SSL as well as for inspecting malware content. A firewall also buckets the cloud-based services into high-end level categories (like Business/Economy, Suspicious, Technology/Internet,); but, such categories usually don’t reflect the basic underlying function of that service like file sharing, social media or maybe CRM. A primary use case of such network-based security solutions is to categorize and enforce access to many illicit websites containing objectionable material including gambling and drugs etc.
Firewalls can surely be configured for blocking the access to some particular IP addresses. However, these solutions often lack a well-detailed and nouveau cloud registries with cloud-service URLs as well as IP addresses for extending this particular functionality of access control to cloud-based services. Most firms using firewalls often come across this issue that while they had initially blocked some of the IP addresses in the cloud services, the cloud service providers still tend to introduce new IPs routinely, which again aren’t blocked. This leads to a widespread phenomenon known as “proxy leakage” wherein employees access cloud-based services regularly, which IT otherwise intends to block.
The IP Restriction feature of a CASB solution helps to cap user access for avoiding any unexpected or inevitable data breaches, which can otherwise take roots into the system thus inducing great losses to the companies. Restriction policies can be imposed to ensure the use of only some pre-defined IP addresses for gaining cloud security through better visibility into cloud usage by knowing clearly how the organizational data is being put to use. IP Restriction feature of a CASB solution would help firms in gaining a much better data control for amplified cloud security. With CASB IP Restriction feature, IT admin can White-list the IP addresses list of the locations from where that firm intends its users to access their respective cloud accounts. Those IP addresses would be public IP addresses (WAN IP) of the networks of that organization. With the IP Restriction feature, multiple policies can be created that are based on organizational units or its individual users helping the admin to restrict access control from any specific devices as per their IP addresses by Whitelisting/Blacklisting IP addresses.
Cloud Access Security Broker solutions are basically the complementary technologies to firewalls. By integrating CASB with these conventional solutions, enterprises can leverage a better cloud security handle in their existing corporate network infrastructure for gaining better visibility into cloud usage. The little cloud visibility rendered through the use of firewalls is increased when integrated to a CASB solution, for the benefit of the organization. At the same time, CASB solutions also enhance the value of such investments made by enterprises by really making them cloud-safe and cloud-aware.