How to Optimize Your Company’s Firewall
All firewalls are divided into two separate categories. The first is vendor-specific or model-specific configuration and the other is general best practices. When configuring your network’s firewall, it’s recommended to use general best practices. This protects your business’s network from hackers or security breaches.
11 Best Practice Rules For Configuring Your Firewall To Optimize Performance And Protect Network
- Outbound Traffic - Your network administrator needs to monitor your servers for undesired outbound traffic. Especially look for DNS, HTTP, SMTP, NTP, and HTTPS request. Furthermore, check for all dropped or rejected internal devices on your network. Afterwards, reconfigure your servers to stop sending unauthorized outbound traffic. This takes the load off your firewall and servers.
- Filter Router Traffic - In order to balance your network it is necessary to configure your router to filter all inbound traffic. By moving the filtering from the firewall, it increases your network performance and effectiveness.
- Remove Rules From The Firewall - To increase the manageability of your firewall, remove all unused rules and objectives.
- Reduce Firewall Rules - Remove base complexity and rule overlapping from your firewall's rule base.
- Broadcast Traffic - Create a new rule that will handle the broadcast traffic on your firewall when it’s connected to your LAN segment.
- Arrange Firewall Rules – Near the top of your firewall rule base place your heaviest used firewall rules. However, not all network firewalls use rule base order. Instead, they depend on optimized algorithms that match their packets.
- Avoid DNS Objects – Eliminate the objects on your network that require DNS lookups.
- Firewall Configuration - Configure your router, switches and firewall to report the same duplex mode and speeds. Therefore, if the router and switch speeds are 100M bps half-duplex then your firewall setting should be the same.
- Separate Your Firewall – Always keep your firewall and VPNs separated. Offload the VPN processing and traffic from the firewall.
- Offload UTM Features – Offload the UTM features that include anti-spam, IPS, URL scanning and anti-virus software from the firewall.
- Software Updates – Always keep the firewall updated with the latest version of software and patches.