fwb_ipf [-vVx] [-d wdir] [-o output.fw] [-i] -f data_file.xml object_name
fwb_ipf is a firewall policy compiler component of Firewall Builder (see fwbuilder(1)). This compiler generates code for ipfilter. Compiler reads objects definitions and firewall description from the data file specified with "-f" option and generates ipfilter configuration files and firewall activation script.
All generated files have names that start with the name of the firewall object. Firewall activation script has extension ".fw" and is simple shell script that flushes current policy, loads new filter and nat rules and then activates ipfilter. IPFilter configuration file name starts with the name of the firewall object, plus "-ipf.conf". NAT configuration file name also starts with the name of the firewall object, plus "-nat.conf". For example, if firewall object has name "myfirewall", then compiler will create three files: "myfirewall.fw", "myfirewall-pf.conf", "myfirewall-nat.conf".
The data file and the name of the firewall objects must be specified on the command line. Other command line parameters are optional.
- -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 and ipfilter configuration files in this directory. If this
parameter is missing, then all files will be placed in the
current working directory.
Be verbose: compiler prints diagnostic messages when it works.
Print version number and quit.
When this option is present, the last argument on the command line is
supposed to be firewall object ID rather than its name
Generate debugging information while working. This option is intended
for debugging only and may produce lots of cryptic messages.
Support for ipf returned in version 1.0.1 of Firewall Builder
both ipf.conf and nat.conf files are generated
negation in policy rules
stateful inspection in individual rule can be turned off in rule
options dialog. By default compiler adds "keep state" or "modulate
state" to each rule with action 'pass'
rule options dialog provides a choice of icmp or tcp rst replies for
rules with action "Reject"
compiler adds flag "allow-opts" if match on ip options is needed
compiler can generate rules matching on TCP flags
compiler can generate script adding ip aliases for NAT rules using addresses
that do not belong to any interface of the firewall
compiler always adds rule "block quick all" at the very bottom of
the script to ensure "block all by default" policy even if the policy
Address ranges in both policy and NAT
Features that are not supported (yet)
negation in NAT
Features that won't be supported (at least not anytime soon)
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