06-01-2011
Quote:
Originally Posted by
garric
I want to open specific ports at the output and block the rest. Putting the default output blocking policy would make the machine unusable. Thus, I shifted it to the bottom the firewall script and that worked. Anything I am doing wrong here?
The default policy takes immediate effect when set, that's true. However, it only blocks you out if you enter the commands manually, which should be the exception, not the rule. When using a script you can set the default policy first, and then open the ports you need without interrupting any traffic.
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LEARN ABOUT DEBIAN
fwb_ipfw
fwb_ipfw(1) Firewall Builder fwb_ipfw(1)
NAME
fwb_ipfw - Policy compiler for ipfw
SYNOPSIS
fwb_ipfw [-vVx] [-d wdir] [-o output.fw] [-i] -f data_file.xml object_name
DESCRIPTION
fwb_ipfw is a firewall policy compiler component of Firewall Builder (see fwbuilder(1)). This compiler generates code for ipfw - a firewall
and traffic shaper in FreeBSD (see ipfw(8)). Compiler reads objects definitions and firewall description from the data file specified with
"-f" option and generates firewall configuration and activation script.
The generated file has a name that starts with the name of the firewall object, with an extension ".fw". It is a shell script that flushes
current policy, then loads new filter and nat rules.
The data file and the name of the firewall objects must be specified on the command line. Other command line parameters are optional.
OPTIONS
-f FILE
Specify the name of the data file to be processed.
-o output.fw
Specify output file name
-d wdir
Specify working directory. Compiler creates firewall activation script in this directory. If this parameter is missing, then all
files will be placed in the current working directory.
-v Be verbose: compiler prints diagnostic messages when it works.
-V Print version number and quit.
-i When this option is present, the last argument on the command line is supposed to be firewall object ID rather than its name
-x Generate debugging information while working. This option is intended for debugging only and may produce lots of cryptic messages.
NOTES
Support for ipfw was added in version 1.0.10 of Firewall Builder
URL
Firewall Builder home page is located at the following URL: http://www.fwbuilder.org/
BUGS
Please report bugs using bug tracking system on SourceForge:
http://sourceforge.net/tracker/?group_id=5314&atid=105314
SEE ALSO
fwbuilder(1), fwb_ipt(1), fwb_pf(1) fwb_ipf(1)
FWB
fwb_ipfw(1)