Forwarding Traffic on the Same Interface: PPTP FTP and Shorewall: Proxy ARP Fool's Firewall: QuickStart Guides Helpers/Helper Modules: Release Model Installation/Upgrade: Requirements IPP2P: Routing and Shorewall IPSEC: Routing on One Interface Ipsets: Samba IPv6 Support
An Introduction to the Shorewall Firewall Tool - Linux.com Shorewall is a high-level configuration tool for Netfilter. Shorewall works by reading configuration files (with the help of iptables, iptables-restore, ip, and tc) found in /etc/shorewall. The primary files used are: Interfaces — defines the physical networking interfaces to be used Shorewall Configuration in Debian And Shorewall GUI 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. HowTo/shorewall - Debian Wiki In Shorewall, PAT is configured in /etc/shorewall/masq: Firewall:~# nano -w /etc/shorewall/masq. We have to tell shorewall that we want all traffic coming from inside the network (on eth1) to be translated out through the interface on eth0). We do this simply by specifying the interfaces: eth0 eth1 eth0 eth2 Shoreline Firewall (Shorewall)
Shorewall allows loose matches to wildcard entries in shorewall-interfaces  (5). For example, ppp0 in this file will match a shorewall-interfaces  (5) entry that defines ppp+. If you want to override ADD_IP_ALIASES=Yes for a particular entry, follow the interface name with ":" and no digit (e.g., "eth0:").
4. Shorewall-lite. Shorewall allows for central administration of multiple IPv4 firewalls through use of Shorewall lite. The full Shorewall product is installed on a central administrative system where compiled Shorewall scripts are generated. These scripts are copied to the firewall systems where they run under the control of Shorewall-lite. 5.
Name. nesting - Shorewall Nested Zones Synopsis. child-zone[:parent-zone[,parent-zone]] Description. In shorewall-zones  (5), a zone may be declared to be a sub-zone of one or more other zones using the above syntax. The child-zone may be neither the firewall zone nor a vserver zone. The firewall zone may not appear as a parent zone, although all vserver zones are handled as sub-zones of
Dec 19, 2012 · Save and close the file. In this example I’ve defined the firewall’s network interfaces (eth0) to Shorewall. Where, net – net is zone for eth0 interface. Must match the name of a zone declared in /etc/shorewall/zones. Download the latest shorewall-x.y.lrp package fro Tom's download area and rename it shorwall.lrp. Download either the Two-interfaces Masquerading Firewall or the Three-interfaces Masquerading Firewall with DMZ depending on your own situation. They will provide you with default setup for the interfaces, masq, policy, rules and zones files that Jan 26, 2017 · While shorewall is still solid, CentOS 7 has a built-in firewall called FirewallD that does 90% of what CSF does, without having to install custom software. Under the covers it's just modifying IPtables, just like most other firewall software. INTERFACE - interface[:address] The name of the network interface to the provider. Must be listed in shorewall-interfaces(5). In general, that interface should not have the proxyarp option specified unless loose is given in the OPTIONS column of this entry. Jan 07, 2015 · The various options you can place for either of these interfaces is extensive, and are best explained in detail on the man page. $ man shorewall-interfaces. A quick run down of some of them are as follows: nosmurfs – filter packets with broadcast address as source. logmartians – log packets with impossible source address. Interfaces Configuration :-The next file to edit is the interfaces file to specify the interfaces on your machine. Here you will connect the zones that you defined in the previous step with an actual interface. The third field is the broadcast address for the network attached to the interface (“detect” will figure this out for you). Dec 20, 2012 · The Shoreline Firewall (also known as “Shorewall”), is a Netfilter (iptables) based firewall that can be used on a dedicated firewall system, a multi-function gateway/ router/server or on a standalone GNU/Linux system.