Maurice/alpine-server-setup
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Seems to work

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Maurice
2025-09-29 18:32:01 +02:00
parent 20dd97aafa
commit b6e9bb6d81
3 changed files with 18 additions and 27 deletions
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19
services/firewall/firewall.nft → services/firewall/config/firewall.nft
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@@ -9,6 +9,8 @@ define lan_net = 192.168.2.0/24
define allowed_icmpv6 = { destination-unreachable, echo-reply, echo-request, nd-neighbor-solicit, nd-router-advert, nd-neighbor-advert, packet-too-big, parameter-problem, time-exceeded } define allowed_icmpv6 = { destination-unreachable, echo-reply, echo-request, nd-neighbor-solicit, nd-router-advert, nd-neighbor-advert, packet-too-big, parameter-problem, time-exceeded }
define allowed_icmp = { destination-unreachable, echo-reply, echo-request, source-quench, time-exceeded } define allowed_icmp = { destination-unreachable, echo-reply, echo-request, source-quench, time-exceeded }
define lan_clients = { 10.0.0.3 }
table inet firewall { table inet firewall {
chain postrouting { chain postrouting {
type nat hook postrouting priority 100; type nat hook postrouting priority 100;
@@ -20,16 +22,16 @@ table inet firewall {
chain incoming { chain incoming {
# This line set what traffic the chain will handle, the priority and default policy. # This line set what traffic the chain will handle, the priority and default policy.
# The priority comes in when you in another table have a chain set to "hook input" and want to specify in what order they should run. # The priority comes in when you in another table have a chain set to "hook input" and want to specify in what order they should run.
type filter hook input priority 0; policy drop; type filter hook input priority 0; policy drop;
ct state invalid drop # early drop of invalid packets ct state invalid drop # early drop of invalid packets
ct state {established, related} accept # allow established/related connections ct state {established, related} accept # allow established/related connections
iif lo accept # allow traffic from loopback interface iif lo accept # allow traffic from loopback interface
# Limit and accept ICMP packets # Limit and accept ICMP packets
ip protocol icmp icmp type @allowed_icmp limit rate 1/second burst 5 packets accept ip protocol icmp icmp type $allowed_icmp limit rate 1/second burst 5 packets accept
ip6 nexthdr icmpv6 icmpv6 type @allowed_icmpv6 limit rate 1/second burst 5 packets accept ip6 nexthdr icmpv6 icmpv6 type $allowed_icmpv6 limit rate 1/second burst 5 packets accept
# Rules for all interfaces # Rules for all interfaces
tcp dport { 80, 443 } accept # Allow http and https for all interfaces tcp dport { 80, 443 } accept # Allow http and https for all interfaces
@@ -49,10 +51,13 @@ table inet firewall {
ct state invalid drop # early drop of invalid packets ct state invalid drop # early drop of invalid packets
ct state {established, related} accept # allow established/related connections ct state {established, related} accept # allow established/related connections
iifname $vpn ip saddr $lan_clients ip daddr $lan_net accept # Allow specific clients to access the LAN network
iifname $vpn ip daddr $lan_net drop # Block all other VPN clients from accessing the LAN network
iifname $vpn oifname $wan accept # Allow VPN traffic to access WAN iifname $vpn oifname $wan accept # Allow VPN traffic to access WAN
} }
chain outgoing { chain outgoing {
type filter hook output priority 0; policy accept; type filter hook output priority 0; policy accept;
} }
} }

21
services/firewall/install.sh
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@@ -1,21 +1,6 @@
#!/bin/sh #!/bin/sh
echo "Setting up firewall..." echo "Setting up firewall..."
apk add -u awall # important -u flag! apk add nftables
apk add ip6tables iptables rc-update add nftables boot
modprobe -v ip_tables rc-service nftables start
modprobe -v ip6_tables
#modprobe -v iptable_nat #if NAT is used
# Register services
rc-update add iptables
rc-update add ip6tables
rc-service iptables start
rc-service ip6tables start
# In the global policy, LAN rules are omitted, as we are behind a NAT router.
# If not, add this to global.policy.json:
# "LAN": { "iface": "eth1" },
# ...
# { "in": "LAN", "action": "accept" },
# { "out": "LAN", "action": "accept" },

1
services/wireguard/install.sh
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@@ -18,6 +18,7 @@ EOF
# Enable IP forwarding, persistent # Enable IP forwarding, persistent
echo "net.ipv4.ip_forward=1" >> /etc/sysctl.d/ip_forward.conf echo "net.ipv4.ip_forward=1" >> /etc/sysctl.d/ip_forward.conf
echo "net.ipv6.conf.all.forwarding=1" >> /etc/sysctl.d/ip_forward.conf
sysctl -p /etc/sysctl.d/ip_forward.conf sysctl -p /etc/sysctl.d/ip_forward.conf
# Auto-start Wireguard on boot # Auto-start Wireguard on boot