nuno / gistfile1.txt

function firewall::block_ip_logged() { local client_ip="$1" target_ip="$2" iptables -I FORWARD 1 -s "$client_ip" -d "$target_ip" -j LOG --log-prefix "wgctl-dropped: " --log-level 4 iptables -I FORWARD 1 -s "$client_ip" -d "$target_ip" -j DROP log::wg_block "Blocked ${client_ip} → ${target_ip} (logged)" } function firewall::unblock_ip() { local client_ip="$1" target_ip="$2" iptables -D FORWARD -s "$client_ip" -d "$target_ip" -j LOG --log-prefix "wgctl-dropped: " --log-level 4 2>/dev/null || true iptables -D FORWARD -s "$client_ip" -d "$target_ip" -j DROP 2>/dev/null || true } function firewall::block_all() { local client_ip="$1" client_name="$2" iptables -A FORWARD -s "$client_ip" -j LOG --log-prefix "wgctl-dropped: " --log-level 4 iptables -A FORWARD -s "$client_ip" -j DROP log::debug "Blocked all traffic from: ${client_ip}" } function firewall::unblock_all() { local client_ip="$1" iptables -D FORWARD -s "$client_ip" -j LOG --log-prefix "wgctl-dropped: " --log-level 4 2>/dev/null || true iptables -D FORWARD -s "$client_ip" -j DROP 2>/dev/null || true monitor::unwatch "$client_ip" log::debug "Unblocked all traffic from: ${client_ip}" } function firewall::apply_guest_dns_redirect() { if iptables -t nat -C PREROUTING -s "$(config::subnet_for guest).0/24" -p udp --dport 53 -j DNAT --to-destination "$(config::dns):53" 2>/dev/null; then log::wg "Guest DNS redirect already applied" return 0 fi local guest_subnet dns guest_subnet="$(config::subnet_for "guest").0/24" dns="$(config::dns)" # Log DNS bypass attempts (queries not directed at Pi-hole) iptables -t nat -A PREROUTING -s "$guest_subnet" -p udp --dport 53 \ ! -d "$dns" \ -j LOG --log-prefix "wgctl-dns-redirect: " --log-level 4 iptables -t nat -A PREROUTING -s "$guest_subnet" -p tcp --dport 53 \ ! -d "$dns" \ -j LOG --log-prefix "wgctl-dns-redirect: " --log-level 4 # Redirect all DNS to Pi-hole iptables -t nat -A PREROUTING -s "$guest_subnet" -p udp --dport 53 -j DNAT --to-destination "${dns}:53" iptables -t nat -A PREROUTING -s "$guest_subnet" -p tcp --dport 53 -j DNAT --to-destination "${dns}:53" log::wg_block "Guest DNS redirected to Pi-hole (${dns}), bypass attempts will be logged" } function firewall::remove_guest_dns_redirect() { local guest_subnet dns guest_subnet="$(config::subnet_for "guest").0/24" dns="$(config::dns)" iptables -t nat -D PREROUTING -s "$guest_subnet" -p udp --dport 53 \ ! -d "$dns" \ -j LOG --log-prefix "wgctl-dns-redirect: " --log-level 4 2>/dev/null || true iptables -t nat -D PREROUTING -s "$guest_subnet" -p tcp --dport 53 \ ! -d "$dns" \ -j LOG --log-prefix "wgctl-dns-redirect: " --log-level 4 2>/dev/null || true iptables -t nat -D PREROUTING -s "$guest_subnet" -p udp --dport 53 -j DNAT --to-destination "${dns}:53" 2>/dev/null || true iptables -t nat -D PREROUTING -s "$guest_subnet" -p tcp --dport 53 -j DNAT --to-destination "${dns}:53" 2>/dev/null || true log::debug "Removed guest DNS redirect" }