![]() The green segment is a safe area representing all normal clients connected to the local wired network. The installation process allows you to configure your network into different security segments, with each segment being color-coded. Owing to its minimalist nature, IPFire is more approachable compared to some of its peers. ![]() IPFire can be deployed on a wide variety of hardware, including ARM devices such as the Raspberry Pi. It began as a fork of the IPCop project, but has since been rewritten based on Linux From Scratch. ![]() Log files should be read only, and with write access granted only to the firewall service account.ģ.IPFire is a Linux-based stateful firewall distro that’s built on top of Netfilter.collect at least source and destination IP addresses and ports, application, protocol, direction, date and time, and rule.In the event of a system compromise, these logs are used in forensic analysis to determine the extent of the compromise, scope of the damage, and nature of the attack. Firewall logs, if enabled, can be used to identify successful attacks. ![]() 3.2 Log Firewall ActivityĪ firewall will reduce the likelihood of compromise, but cannot prevent all attacks. Restricting outbound traffic provides an additional layer of security against misuse or data loss in the event of a compromised host and should be used where appropriate. Many times firewalls are configured such that rules are only placed on inbound traffic and allow all outbound traffic. Additional Security 3.1 Restrict Outbound Traffic ISO will scan hosts on the campus network to determine if hosts are vulnerable to common network threats or if a system appears to have been compromised. Allow Incoming Traffic from Information Security Office Security ScannersĬonfigure your firewalls to allow network-based scanning by Information Security Office (ISO) vulnerability scanners. If the device must be accessed from off-campus, only allow access from the campus VPN for remote connectivity. If remote access to the host is desired (e.g., via Remote Desktop Protocol (RDP) or ssh), limit remote access to a finite number of IPs and/or subnets. To enable proper protection, it is necessary to have a rule that denies any inbound traffic that is not specifically necessary to the proper use of the device. Further, a lack of proper restrictions will also allow undesired access to resources such as printers. Insufficient restrictions on system access over the network increases exposure to attack from viruses, worms, and other malicious activity. Further, many printers, and network attached equipment have access controls to restrict connections to a limited number of hosts or networks in compliance with this policy. ![]()
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