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    The following form allows you to view linux man pages.

    Command:

    ipfw

    
         configuration file:
    
               options IPFIREWALL
    
         Other kernel options related to ipfw which may also be useful are:
    
               options IPFIREWALL_DEFAULT_TO_ACCEPT
               options IPFIREWALL_FORWARD
               options IPFIREWALL_VERBOSE
               options IPFIREWALL_VERBOSE_LIMIT=100
    
         To load ipfw as a module at boot time, add the following line into the
         loader.conf(5) file:
    
               ipfw_load="YES"
    
    
    

    DESCRIPTION

         The ipfw system facility allows filtering, redirecting, and other opera-
         tions on IP packets travelling through network interfaces.
    
         The default behavior of ipfw is to block all incoming and outgoing traf-
         fic.  This behavior can be modified, to allow all traffic through the
         ipfw firewall by default, by enabling the IPFIREWALL_DEFAULT_TO_ACCEPT
         kernel option.  This option may be useful when configuring ipfw for the
         first time.  If the default ipfw behavior is to allow everything, it is
         easier to cope with firewall-tuning mistakes which may accidentally block
         all traffic.
    
         To enable logging of packets passing through ipfw, enable the
         IPFIREWALL_VERBOSE kernel option.  The IPFIREWALL_VERBOSE_LIMIT option
         will prevent syslogd(8) from flooding system logs or causing local Denial
         of Service.  This option may be set to the number of packets which will
         be logged on a per-entry basis before the entry is rate-limited.
    
         Policy routing and transparent forwarding features of ipfw can be enabled
         by IPFIREWALL_FORWARD kernel option.
    
         The user interface for ipfw is implemented by the ipfw(8) utility, so
         please refer to the ipfw(8) manpage for a complete description of the
         ipfw capabilities and how to use it.
    
    
    

    SEE ALSO

         setsockopt(2), divert(4), ip(4), ipfw(8), sysctl(8), syslogd(8), pfil(9)
    
    
    

    BSD September 1, 2006 BSD

    
    
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