Shorewall (Shoreline Firewall) is a gateway/firewall configuration tool for GNU/Linux. It is not a cloud security SaaS product; instead, it organizes policies through configuration files and generates Netfilter-based firewall rules. It is designed for router/firewall/gateway scenarios, making it suitable for using a Linux host as an edge gateway, NAT device, VPN gateway, or multi-zone access control node.
In terms of protection features, Shorewall supports stateful packet filtering based on connection tracking, allowing networks to be divided into zones and connections between zones to be controlled. It also covers SNAT/Masquerading, DNAT port forwarding, one-to-one NAT, Proxy ARP, NETMAP, allowlists/blocklists, MAC address verification, bridged firewalls, IPv6, and VPN scenarios such as IPsec, GRE, IPIP, OpenVPN, and PPTP. It also supports multiple ISPs, multiple interfaces, nested/overlapping zones, and traffic shaping/QoS. Deployment is primarily through native Linux packages, with Debian/RPM packages available. Shorewall Lite is also available for centrally generating scripts and running them on managed firewalls, while Webmin can provide a GUI.
The documentation explicitly states that Shorewall is released under the GNU GPL and can be freely redistributed and modified. The website only mentions donations and does not list commercial subscription pricing. Support mainly comes in the form of documentation, FAQs, HOWTOs, mailing lists, and community resources. For enterprises, this means low software cost, but SLA coverage, vendor response guarantees, and compliance certification information are absent, so operational capabilities need to be assessed internally.
Its strengths are broad feature coverage, transparent open-source licensing, and very extensive documentation. It is well suited to system administrators familiar with Linux, iptables/Netfilter, routing, and NAT. The drawbacks are a noticeable learning curve, and the documentation for complex traffic shaping also indicates that additional knowledge of LARTC, HTB, HFSC, and related concepts is required. Meanwhile, modern centralized alerting, reporting, commercial technical support, and compliance certifications are not reflected in the available documentation. It is not a good fit for teams looking for a ready-to-use managed firewall or cloud WAF.
The documentation does not provide information about access from mainland China, payment methods, or mirror availability, so China access is assessed as unknown. For easier-to-use alternatives, consider firewalld or ufw. If you need a complete firewall distribution, compare pfSense, OPNsense, and VyOS. If you have sufficient low-level networking expertise, you can also use iptables/nftables directly.
β This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on shorewall.cz official site.
shorewall.cz is an Czechia Cybersecurity provider. TG4G tracks its product information, an overall rating of 6.0/10, and a China-accessibility score of China direct-connect friendly. Click "Visit Official Site" to reach shorewall.cz directly.