shorewall-rules Shorewall does not impose as much structure on the Netfilter rules in the 'nat' table as it does on those in the filter table. As a consequence, when using Shorewall versions before 4.1.4, care must be exercised when using DNAT and REDIRECT rules with zones defined with wildcard interfaces (those ending with '+'. shorewall-rtrules Before Shorewall-generated 'MARK' rules. 11000-11999. After 'MARK' rules but before Shorewall-generated rules for ISP interfaces. 26000-26999. After ISP interface rules but before 'default' rule. Beginning with Shorewall 5.0.2, the priority may be followed optionally by an exclaimation mark ("!"). This causes the rule to remain in place if the

Ubuntu Manpage: rtrules - Shorewall Routing Rules file

4) Shorewall-rules(5) incorrectly stated that the 'bypass' option to NFQUEUE causes the rule to be silently bypassed if there is no application attached to the queue. The actual behavior is that the rule acts like ACCEPT in that case. Shorewall-rules(5) has been corrected. /etc/ shorewall / initdone – This is an optional Perl script, which is executed by the Shorewall rules compiler after finalising installation. /etc/ shorewall /interfaces – This explains the interfaces on the firewall system. /etc/ shorewall /hosts – This file helps users to define zones in terms of individual hosts and sub-networks. The rule's numeric priority which determines the order in which the rules are processed. Rules with equal priority are applied in the order in which they appear in the file. 1000-1999 Before Shorewall-generated 'MARK' rules 11000-11999 After 'MARK' rules but before Shorewall-generated rules for ISP interfaces. 26000-26999

Shorewall uses zones as a way of defining different portions of our network. Our simple example will have three zones: internet, dmz, and local. Shorewall can easily be extended to support many more zones such as a DMZ or a VPN zone. This configuration is performed in /etc/shorewall/zones: Firewall:~# nano -w /etc/shorewall/zones

Shorewall - ArchWiki The Shoreline Firewall, more commonly known as "Shorewall", is a high-level tool for configuring Netfilter.. You describe your firewall/gateway requirements using entries in a set of configuration files. Shorewall reads those configuration files and with the help of the iptables utility, Shorewall configures Netfilter to match your requirements. shorewall-rules: Shorewall rules file - Linux Man Pages (5) NAME. rules - Shorewall rules file SYNOPSIS /etc/shorewall/rules DESCRIPTION. Entries in this file govern connection establishment by defining exceptions to the policies laid out in m[blue]shorewall-policym[][1](5).By default, subsequent requests and responses are automatically allowed using connection tracking. Shorewall - Wikipedia Shorewall is an open source firewall tool for Linux that builds upon the Netfilter (iptables/ipchains) system built into the Linux kernel, making it easier to manage more complex configuration schemes by providing a higher level of abstraction for describing rules using text files. SourceForge