We offer to buy Firewalls – software and hardware devices responsible for ensuring network security. Firewalls effectively separate the local and global networks.
Operating principle: incoming/outgoing traffic and based on the specified rules, content is filtered. As a result, information packets are either skipped or blocked..
Powerful solutions from generalists
companies Cisco and Juniper – market leaders also sell network security products.
Equipment manufacturers offer more than just security features built into routers and switches. But they also provide individual software and hardware solutions.
- Reliably protects networks from attacks and malware;
- Capable of blocking Skype, torrents, social networks and other unwanted applications;
- Provides detailed network health monitoring capabilities;
- Performs deep content analysis;
- Provides flexibility in choosing security policies
- Favor the successful use of personal smartphones and tablets by employees for work purposes.
Devices Cisco suitable for large data centers and service providers or medium/small corporate networks, depending on the model. Ruggedized options can be adapted to operate over a wide temperature range. Functionality is determined by the type of license.
Firewalls Juniper Networks easy to set up and high performance. By integrating into security gateways, the devices provide unparalleled perimeter protection against all sorts of attacks and malware.. The equipment is built on the basis of a reliable Junos operating system - a proprietary development of a well-known company.
Where to use?
Firewalls Juniper can be used by communication providers, installed in data centers, medium and small offices, at geographically distributed enterprises. Scope depends on the specific model.
Effective solutions from security experts
Firewalls Fortinet often included in UTM – unified network protection systems with antivirus, antispam and web filter. Typical representatives of the technology are the family FortiGate.
The device manufacturer also issues individual specialized products. For example, Firewall is designed to protect mail and web servers. And the firewall has a suppression function DDoS-attacks.
proprietary software FortiOS implements many useful functions. It supports the concept of BYOD, which allows you to use mobile devices as for personal needs and for work.
- Small office space;
- Retail sales networks;
- large scale organizations;
- Data centers;
- Service providers.
Traffic filtering based on a set of pre-configured rules called ruleset. It is convenient to think of a firewall as a sequence of filters that process the information flow..
Each of the filters is designed to interpret a separate rule. Sequence of rules in a set affects firewall performance. For example, many firewalls sequentially compare traffic against rules until a match is found..
For such firewalls, the rules that match the most traffic should be placed as high as possible in the list.. It's essential will increase productivity.
Ultimately, firewalls perform one of two operations on incoming traffic.. Or miss package next, or about Tbspread out his.
Some firewalls have another operation - cancellation. With her, the package is also about TbResolves, but the sender is notified that the service is unavailable. Unlike during surgery deny, where the sender is not informed about the unavailability of the service. This option is more secure..
Types of firewalls
Until now, there is no single and generally recognized classification of firewalls.. However, in most cases, the supported level of the network model OSI plays a major role in classifying.
- Managed Switches;
- Packet filters;
- Session level gateways;
- Application Layer Brokers;
- State Inspectors.
There are two types of firewalls: program and software and hardware. In turn, the software and hardware version has two varieties - in the form of a separate module in a switch or router and in the form of a specialized device.
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