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# -*- shell-script -*-
#
# Configuration file for ferm(1).
#
domain (ip ip6) {
table filter {
chain INPUT {
policy DROP;
# connection tracking
mod state state INVALID DROP;
mod state state (ESTABLISHED RELATED) ACCEPT;
# allow local packet
interface lo ACCEPT;
# respond to ping
proto icmp ACCEPT;
# allow IPsec
proto udp dport 500 ACCEPT;
@if @eq($DOMAIN, ip) {
proto (esp ah) ACCEPT;
} @else {
proto (esp) ACCEPT;
}
# allow SSH connections
proto tcp dport ssh ACCEPT;
}
chain OUTPUT {
policy ACCEPT;
# connection tracking
#mod state state INVALID DROP;
mod state state (ESTABLISHED RELATED) ACCEPT;
}
chain FORWARD {
policy DROP;
# connection tracking
mod state state INVALID DROP;
mod state state (ESTABLISHED RELATED) ACCEPT;
}
}
}
@include ferm.d/;
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