48 lines
1.7 KiB
Plaintext
Executable File
48 lines
1.7 KiB
Plaintext
Executable File
#!/usr/sbin/nft -f
|
|
|
|
table inet main_inet
|
|
flush table inet main_inet
|
|
delete table inet main_inet
|
|
|
|
table inet main_inet {
|
|
chain input {
|
|
type filter hook input priority 0;
|
|
|
|
# Accept any localhost traffic.
|
|
iif lo accept;
|
|
|
|
{% if system_base_interfaces_iifname %}
|
|
# Accept any traffic on these interfaces.
|
|
iifname { {{ system_base_interfaces_iifname | join(", ") }} } accept;
|
|
|
|
{% endif %}
|
|
# Accept traffic originated from us.
|
|
ct state established,related accept;
|
|
|
|
# Allow ICMP packets.
|
|
# Note that for IPv6 nd-neighbor-solicit, nd-router-advert, nd-neighbor-advert are needed to not break connectivity.
|
|
ip6 nexthdr icmpv6 icmpv6 type { echo-request, destination-unreachable, packet-too-big, time-exceeded, parameter-problem, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert } accept;
|
|
ip protocol icmp icmp type { echo-request, destination-unreachable, router-advertisement, time-exceeded, parameter-problem } accept;
|
|
|
|
# Drop invalid connections.
|
|
ct state invalid drop;
|
|
|
|
# TCP ports.
|
|
tcp dport { {{ [ansible_port] | union(system_base_additional_tcp_ports) | join(", ") }} } ct state new accept;
|
|
|
|
{% if system_base_udp_ports %}
|
|
# UDP ports.
|
|
udp dport { {{ system_base_udp_ports | join(", ") }} } accept;
|
|
|
|
{% endif %}
|
|
# Count and drop any other traffic.
|
|
counter drop;
|
|
}
|
|
chain forward {
|
|
type filter hook forward priority 0;
|
|
}
|
|
chain output {
|
|
type filter hook output priority 0;
|
|
}
|
|
}
|