91 lines
2.5 KiB
Text
91 lines
2.5 KiB
Text
|
#!/usr/sbin/nft -f
|
||
|
|
|
||
|
|
flush ruleset
|
||
|
|
|
||
|
|
table inet nat {
|
||
|
|
chain prerouting {
|
||
|
|
type nat hook prerouting priority dstnat;
|
||
|
|
iif eth0 tcp dport ${env['ports']['syncthing_relaysrv']} redirect to :22067
|
||
|
|
iif eth0 tcp dport 25 redirect to :${env['ports']['mailserver_smtp']}
|
||
|
|
iif eth0 tcp dport 465 redirect to :${env['ports']['mailserver_smtps']}
|
||
|
|
iif eth0 tcp dport 993 redirect to :${env['ports']['mailserver_imaps']}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
table inet filter {
|
||
|
|
set blackhole_ipv4 {
|
||
|
|
type ipv4_addr
|
||
|
|
timeout 30s
|
||
|
|
flags dynamic
|
||
|
|
}
|
||
|
|
|
||
|
|
set blackhole_ipv6 {
|
||
|
|
type ipv6_addr
|
||
|
|
timeout 30s
|
||
|
|
flags dynamic
|
||
|
|
}
|
||
|
|
|
||
|
|
chain input {
|
||
|
|
type filter hook input priority 0; policy drop;
|
||
|
|
|
||
|
|
iif lo accept
|
||
|
|
|
||
|
|
# Block all IPs in blackhole
|
||
|
|
ip saddr @blackhole_ipv4 set update ip saddr @blackhole_ipv4 drop
|
||
|
|
ip6 saddr @blackhole_ipv6 set update ip6 saddr @blackhole_ipv6 drop
|
||
|
|
|
||
|
|
ct state invalid drop
|
||
|
|
ct state { established, related } accept
|
||
|
|
|
||
|
|
<%text>
|
||
|
|
# Prevent DDoS
|
||
|
|
# Rate limiting
|
||
|
|
meta nfproto ipv4 meter ratelimit4 \
|
||
|
|
{ ip saddr limit rate over 75/second burst 15 packets } \
|
||
|
|
add @blackhole_ipv4 { ip saddr } counter
|
||
|
|
meta nfproto ipv6 meter ratelimit6 \
|
||
|
|
{ ip6 saddr limit rate over 75/second burst 15 packets } \
|
||
|
|
add @blackhole_ipv6 { ip6 saddr } counter
|
||
|
|
# Max concurrent connections
|
||
|
|
meta nfproto ipv4 meter connlimit4 \
|
||
|
|
{ ip saddr ct count over 100 } add @blackhole_ipv4 { ip saddr } counter
|
||
|
|
meta nfproto ipv6 meter connlimit6 \
|
||
|
|
{ ip6 saddr ct count over 100 } add @blackhole_ipv6 { ip6 saddr } counter
|
||
|
|
</%text>
|
||
|
|
|
||
|
|
# Allow ICMP
|
||
|
|
meta l4proto icmp accept
|
||
|
|
meta l4proto ipv6-icmp accept
|
||
|
|
|
||
|
|
# HTTP/S
|
||
|
|
tcp dport { http, https } accept
|
||
|
|
|
||
|
|
# SSH
|
||
|
|
tcp dport ssh accept
|
||
|
|
|
||
|
|
# SMTP/IMAP
|
||
|
|
tcp dport { ${env['ports']['mailserver_smtp']}, ${env['ports']['mailserver_smtps']}, ${env['ports']['mailserver_imaps']} } accept
|
||
|
|
|
||
|
|
# Syncthing
|
||
|
|
tcp dport { ${env['ports']['syncthing_tcp']}, 22067 } accept
|
||
|
|
udp dport ${env['ports']['syncthing_udp']} accept
|
||
|
|
|
||
|
|
# Coturn
|
||
|
|
tcp dport { ${env['ports']['coturn_listening']}, ${env['ports']['coturn_tls_listening']} } accept
|
||
|
|
udp dport { ${env['ports']['coturn_listening']}, ${env['ports']['coturn_tls_listening']}, ${env['ports']['coturn_relay_min']}-${env['ports']['coturn_relay_max']} } accept
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
chain forward {
|
||
|
|
type filter hook forward priority 0; policy accept;
|
||
|
|
}
|
||
|
|
|
||
|
|
chain output {
|
||
|
|
type filter hook output priority 0; policy accept;
|
||
|
|
|
||
|
|
# Don't waste resources responding to blocked IPs
|
||
|
|
ip daddr @blackhole_ipv4 reject
|
||
|
|
ip6 daddr @blackhole_ipv6 reject
|
||
|
|
}
|
||
|
|
}
|