Your corporate network is the heart of your business. You therefore want the processes that take place within your company network to happen quickly and securely. To prevent external threats, it is wise to take security measures with security products. You can do this with a firewall. A firewall is a network security device that monitors incoming and outgoing network traffic and determines which traffic is allowed or blocked based on a defined set of security rules.

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What types of firewalls exist?

There are different types of firewalls. But which type of firewall is right for your situation? You have a choice of the following types:

  • Packet filtering firewall / multipurpose firewalls: A packet filtering or multipurpose firewall operates at the network layer of the TCP/IP protocol stack. Based on a set of rules, the firewall determines whether an IP packet is allowed to pass or blocked. Thanks to packet filtering, exceptions can be made in traffic that may be permitted from the outside to, for example, a web server.
    • PIX: Private Internet eXchange (PIX) was used for IP firewalls and network address translation (NAT). PIX is no longer supplied new, but is still offered refurbished.
    • ASA: Today, Adaptive Security Appliance (ASA) is primarily used and has taken over many of the PIX functions. ASA does have additional options including: Stateful Inspection, ACLs, SSL, VPN and intrusion prevention.
  • Application layer firewall: An application layer firewall also works on the application layer of the TCP/IP protocol stack. For each supported protocol, a piece of software determines whether packets are stopped or allowed through. Each protocol is handled separately. This piece of software can consist of much more than a few simple rules.
  • Stateless firewall: A stateless firewall treats each packet separately, the firewall does not store any information about the connections passing through it in the meantime.
  • Stateful firewall: A stateful firewall does keep intermediate information of connections passing through the firewall. This allows the firewall to better distinguish between allowed and unallowed packets.

What security products are available at Qualified Networks?

Qualified Networks supplies all of the above firewalls, both new and refurbished. Besides packet filtering and ASA we also supply refurbished PIX firewalls that are no longer supplied new.

Whatever security products you are looking for, we make sure that you get your desired security products quickly. Do you have any questions about our security products? Then please contact us! We are happy to give you more information about these products.

This is why you choose Qualified Networks:

  • Great service, our experts are ready to answer your questions
  • Fast delivery: we can deliver most products within 24 hours. This way you can get started right away.
  • Sharp prices, we offer discounts up to 95% including a lifetime warranty

Curious about the possibilities? Please contact us or request a quote directly and without obligation.

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Do you want to sell your IT equipment or buy IT equipment yourself? Then get in touch with us. Our specialists will be happy to help you.

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about us

Why choose Qualified Networks?

Do you want to sell your old IT equipment? Or do you want to buy refurbished or new IT equipment? Then choose Qualified Networks. You will be personally assisted by our specialists, so you can make the best choice from all the equipment we offer. In addition, you can get help configuring your new IT equipment and deleting the data on your old equipment.

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  • Sharpest prices purchase & sale
    Both for the purchase and sale of IT equipment you will always receive or pay a competitive price.
  • Delivery often within 24 hours
    You often receive your purchased IT equipment within 24 hours. So you can get started with your equipment in no time.
  • Certified data removal
    Sensitive corporate data is removed from your IT equipment in a certified manner. This ensures that your sensitive business data is safely and 100% deleted.
  • Lifetime warranty on your equipment
    Is your IT equipment not working properly? Thanks to our lifetime warranty, we’ll make sure your IT equipment is working properly again.
  • Entire logistics process taken care of
    Perhaps you don’t have the time or resources to bring or pick up your IT equipment yourself. That’s why we arrange the entire logistics process for you.

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We normally throw away all old hardware and have our data carriers destroyed for a lot of money." And this while Qualified Networks can still give law firms thousands of dollars for their old IT equipment. In addition, all data carriers are certified erased giving a law firm a 100% guarantee that all data has been deleted according to the... Read more
Law firms
We use switches to ensure that their wired network can be extended to connect different equipment." Qualified Networks helped a large fruit merchant with refurbished switches. In addition to the favorable prices, the big fruit dealer was satisfied with the quality of our IT equipment and the lifetime warranty they received with it. All equipment was delivered within a week to all 27 branches of this big fruit... Read more
Large fruit merchants
We need transceivers / SFPs to send and receive data." Qualified Networks was able to arrange this for a hospital at a substantial discount. We have realized this within 2 days. Besides the fact that the transceivers / SFP's were delivered quickly, the hospital also saved tens of thousands of euro's. Thanks to this huge saving, they had the opportunity to purchase additional... Read more
We were looking for a few hundred Cisco routers that Cisco might not be able to deliver for another 9 months." Qualified Networks was called in to see if it could still be realized sooner. We succeeded! Within 1,5 week we were able to deliver everything to the different branches of this retailer. The customer was completely relieved and didn't experience any problems with delivery and the shortage many companies are currently dealing... Read more
A major international retailer
We used to hand in our old IT equipment to the vendor for a fee." Qualified Networks suggested that we bid along for once. And as it turned out, we bid more than 50% higher than the obtained trade-in value. We neatly worked everything out in a contract. We included the fact that data wiping is very important. The best part of this project was that we were able to return some nice laptops for children who don't have the budget for a... Read more
School community

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Do you want to sell your IT equipment or buy IT equipment yourself? Then get in touch with us. Our specialists will be happy to help you.

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