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.TH "firehol-modifiers" "5" "Built 30 Mar 2024" "FireHOL Reference" "3.1.7"
.hy
.SH NAME
.PP
firehol-modifiers - select IPv4 or IPv6 mode
.SH SYNOPSIS
.PP
ipv4 \f[I]definition-or-command\f[R] \f[I]argument\f[R]\&...
.PP
ipv6 \f[I]definition-or-command\f[R] \f[I]argument\f[R]\&...
.PP
[both] \f[I]definition-or-command\f[R] \f[I]argument\f[R]\&...
.SH DESCRIPTION
.PP
When preceded by a modifier, any command or definition can be made to
apply to IPv4 or IPv6 only.
.PP
Without a modifier, interface and router definitions and commands that
come before either get applied to \f[V]both\f[R] IPv4 and IPV6.
.PP
Commands within an \f[V]interface\f[R] or \f[V]router\f[R] assume the
same behaviour as the enclosing definition.
You cannot create an IPv4 command within an IPv6 interface or router nor
IPv6 within IPv4.
.PP
Examples:
.IP
.nf
\f[C]

 interface eth0 myboth src4 192.0.2.0/24 src6 2001:DB8::/24
   ipv4 server http accept
   ipv6 server http accept

 ipv4 interface eth0 my4only src 192.0.2.0/24
   server http accept

 ipv6 interface eth0 my6only src 2001:DB8::/24
   server http accept
\f[R]
.fi
.PP
Many definitions and commands have explicitly named variants (such as
router4, router6, router46) which can be used as shorthand.
.SH SEE ALSO
.IP \[bu] 2
firehol(1) - FireHOL program
.IP \[bu] 2
firehol.conf(5) - FireHOL configuration
.IP \[bu] 2
firehol-interface(5) - interface definition
.IP \[bu] 2
firehol-router(5) - router definition
.IP \[bu] 2
firehol-policy(5) - policy command
.IP \[bu] 2
firehol-protection(5) - protection command
.IP \[bu] 2
firehol-server(5) - server, route commands
.IP \[bu] 2
firehol-client(5) - client command
.IP \[bu] 2
firehol-group(5) - group command
.IP \[bu] 2
firehol-iptables(5) - iptables helper
.IP \[bu] 2
firehol-masquerade(5) - masquerade helper
.IP \[bu] 2
FireHOL Website (http://firehol.org/)
.IP \[bu] 2
FireHOL Online PDF Manual (http://firehol.org/firehol-manual.pdf)
.IP \[bu] 2
FireHOL Online Documentation (http://firehol.org/documentation/)
.SH AUTHORS
FireHOL Team.