Tom Eastep 2003-12-28 2001-2003 Thomas M. Eastep 1.4.8 Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover, and with no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. Introduction to Shorewall QuickStart Guides (HOWTOS) The remainder of the Documentation supplements the QuickStart Guides. Please review the appropriate guide before trying to use this documentation directly. Accounting Aliased (virtual) Interfaces (e.g., eth0:0) Blacklisting Static Blacklisting using /etc/shorewall/blacklist Dynamic Blacklisting using /sbin/shorewall Commands (Description of all /sbin/shorewall commands) Common configuration file features Comments in configuration filesLine ContinuationINCLUDE DirectivePort Numbers/Service Namesconfiguration_file_basics.htm#PortsPort RangesUsing Shell VariablesUsing DNS NamesComplementing an IP address or SubnetShorewall Configurations (making a test configuration)Using MAC Addresses in Shorewall Configuration File Reference Manual paramszonesinterfaceshostspolicyrulescommonmasqproxyarpnattunnelstcrulesshorewall.confmodulestosblacklistrfc1918routestoppedaccountingusersets and usersmaclistactions and action.template Corporate Network Example (Contributed by a Graeme Boyle) DHCP ECN Disabling by host or subnet Errata Extension Scripts (How to extend Shorewall without modifying Shorewall code through the use of files in /etc/shorewall -- /etc/shorewall/start, /etc/shorewall/stopped, etc.) Fallback/Uninstall FAQs Features Forwarding Traffic on the Same Interface FTP and Shorewall Getting help or answers to questions Installation/Upgrade IPSEC Kazaa Filtering Kernel Configuration Logging MAC Verification Multiple Zones Through One Interface My Shorewall Configuration (How I personally use Shorewall) Netfilter Overview One-to-one NAT (Formerly referred to as Static NAT) OpenVPN Operating Shorewall 'Ping' Management Port Information Which applications use which ports Ports used by Trojans PPTP Proxy ARP Requirements Samba Shorewall Setup GuideIntroductionShorewall ConceptsNetwork InterfacesAddressing, Subnets and RoutingIP AddressesSubnetsRoutingAddress Resolution Protocol (ARP)RFC 1918Setting up your NetworkRoutedNon-routedSNATDNATProxy ARPOne-to-one NATRulesOdds and EndsDNSStarting and Stopping the Firewall Starting/stopping the FirewallDescription of all /sbin/shorewall commandsHow to safely test a Shorewall configuration change Squid with Shorewall Traffic Accounting Traffic Shaping/QOS Troubleshooting (Things to try if it doesn't work) User-defined Actions UID/GID Based Rules Upgrade Issues VPN IPSEC GRE and IPIP OpenVPN PPTP 6to4 IPSEC/PPTP passthrough from a system behind your firewall to a remote network Other VPN types White List Creation