Firewalls: Top-level network security for businesses

What is a firewall and what types are there?

A firewall is a security component that controls data traffic between internal networks and the Internet. It protects sensitive information, prevents unauthorized access, and filters harmful content.

There are different types:

• Hardware firewalls (HW firewalls): Dedicated devices for maximum performance and isolation
• Software firewalls: Installed as an application on an operating system
• Next-generation firewalls (NGFW): Combine stateful inspection with deep packet inspection, application control, and malware filtering

Which firewall is right for your company?

The requirements for a network firewall depend heavily on the industry, company size, and existing IT infrastructure. Here is an overview of proven models and manufacturers:

Sophos Firewall

• Sophos XG / SG series (SG115, SG135, SG230): Ideal for SMEs with centralized management via Sophos Central
• Sophos UTM: Classic unified threat management with a simple user interface
• Advantages: Clearly structured interface, versatile protection functions, good scalability

Fortinet Firewall

• FortiGate 100F and other series: High-performance NGFW for medium to large networks
• Integrated SD-WAN, IPS, antivirus, and application control
• Centralized management via FortiManager

Cisco Firewall 

• Cisco ASA (Adaptive Security Appliance): Robust solution with VPN, IDS/IPS, and URL filtering functions
• Cisco Meraki Firewall: Cloud-managed security solution with easy scaling

Other manufacturers

• Palo Alto Firewall: Maximum security through App-ID and User-ID technology
• Barracuda Firewall: Powerful with integrated web filtering and malware protection
• Lancom Firewall: GDPR-compliant solutions “Made in Germany”
• Securpoint Firewall: Particularly well established for use in schools and government agencies

Managed Firewall Services: Take advantage of our optional Managed Service Firewall offerings – ideal for companies without their own IT security team. 

What to look for when buying a firewall?

Before purchasing a firewall, you should consider the following aspects:

• Throughput rate (firewall throughput) – depends on data volume and number of users
• VPN performance – important for home office and branch office connections
• Licensing model – many providers rely on subscriptions (e.g., Sophos, Fortinet)
• Number of ports – for flexible network expansion

Firewalls: new, used, and refurbished at it-market

At it-market, you will find tested firewalls for all common manufacturers and requirements. We offer new, used, and refurbished firewalls with tested quality.

Benefit from:

• 3-year warranty for companies
• Up to 2,500€ buyer protection
• Short delivery times 

Do you have any questions? Our sales team will be happy to answer any questions you may have about IT hardware and IT remarketing.