mirror of
https://github.com/RaspAP/raspap-webgui.git
synced 2024-11-22 07:30:23 +00:00
Implement firewall
- settings in iptables_rules.json - creates a script under /tmp/iptables_raspap.sh and executes it - no installer yet - to do: deal with Bridge and VPN settings
This commit is contained in:
Christian Zeitnitz
parent
98533c3ee8
commit
59abc641d6
4 changed files with 413 additions and 0 deletions
168
config/iptables_rules.json
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168
config/iptables_rules.json
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@ -0,0 +1,168 @@
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{
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"info": "IPTABLES rules. $...$ expressions will be replaces automatically ($INTERFACE$, $PORT$, $IPADDRESS$)",
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"rules_v4_file": "/etc/iptables/rules.v4",
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"rules_v6_file": "/etc/iptables/rules.v6",
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"order": [ "pre_rules", "restriction_rules", "main_rules", "exception_rules" ],
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"pre_rules": [
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{
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"name": "firewall policies",
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"fw-state": true,
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"comment": "Policy rules (firewall)",
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"rules": [
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"-P INPUT DROP",
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"-P FORWARD ACCEPT",
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"-P OUTPUT ACCEPT",
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"-t nat -P PREROUTING ACCEPT",
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"-t nat -P POSTROUTING ACCEPT",
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"-t nat -P INPUT ACCEPT",
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"-t nat -P OUTPUT ACCEPT"
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]
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},
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{
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"name": "policies",
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"fw-state": false,
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"comment": "Policy rules",
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"rules": [
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"-P INPUT ACCEPT",
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"-P FORWARD ACCEPT",
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"-P OUTPUT ACCEPT",
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"-t nat -P PREROUTING ACCEPT",
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"-t nat -P POSTROUTING ACCEPT",
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"-t nat -P INPUT ACCEPT",
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"-t nat -P OUTPUT ACCEPT"
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]
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},
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{
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"name": "loopback",
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"fw-state": true,
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"comment": "allow loopback device",
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"rules": [
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"-A INPUT -i lo -j ACCEPT",
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"-A OUTPUT -o lo -j ACCEPT"
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]
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},
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{
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"name": "ping",
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"fw-state": true,
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"comment": "allow ping request and echo",
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"rules": [
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"-A INPUT -p icmp --icmp-type 8/0 -j ACCEPT",
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"-A INPUT -p icmp --icmp-type 0/0 -j ACCEPT"
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]
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},
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{
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"name": "ntp",
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"fw-state": true,
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"comment": "allow ntp request via udp (tcp should work w/o rule)",
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"rules": [
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"-A INPUT -p udp --sport 123 -j ACCEPT"
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]
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},
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{
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"name": "dns",
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"fw-state": true,
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"comment": "allow dns request via tcp and udp",
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"rules": [
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"-A INPUT -p udp -m multiport --sport 53,853 -j ACCEPT",
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"-A INPUT -p tcp -m multiport --sport 53,853 -j ACCEPT"
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]
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}
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],
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"main_rules": [
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{
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"name": "accesspoint",
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"fw-state": true,
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"comment": "Access point interface by default no restrictions",
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"dependson": [
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{ "var": "ap-device", "type": "string", "replace": "$INTERFACE$" }
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],
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"rules": [
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"-A INPUT -i $INTERFACE$ -j ACCEPT",
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"-A OUTPUT -o $INTERFACE$ -j ACCEPT"
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]
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},
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{
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"name": "clients",
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"fw-state": true,
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"comment": "Rules for client interfaces (includes tun device)",
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"rules": [
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"-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT"
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]
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},
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{
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"name": "openvpn",
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"comment": "Rules for tunnel device (tun)",
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"dependson": [
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{ "var": "openvpn-enable", "type": "bool" },
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{ "var": "openvpn-serverip", "type": "string", "replace": "$IPADDRESS$" },
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{ "var": "client-device", "type": "string", "replace": "$INTERFACE$" }
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],
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"rules": [
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"-A FORWARD -i tun+ -o $INTERFACE$ -m state --state RELATED,ESTABLISHED -j ACCEPT",
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"-A FORWARD -i $INTERFACE$ -o tun+ -j ACCEPT",
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"-t nat -A POSTROUTING -o tun+ -j MASQUERADE"
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]
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}
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],
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"exception_rules": [
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{
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"name": "ssh",
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"fw-state": true,
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"comment": "Allow ssh access to RaspAP on port 22",
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"dependson": [
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{ "var": "ssh-enable", "type": "bool" }
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],
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"rules": [
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"-A INPUT -p tcp --dport 22 -j ACCEPT"
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]
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},
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{
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"name": "http",
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"fw-state": true,
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"comment": "Allow access to RaspAP GUI (https)",
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"dependson": [
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{ "var": "http-enable", "type": "bool" }
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],
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"rules": [
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"-A INPUT -p tcp -m multiport --dports 80,443 -j ACCEPT"
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]
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},
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{
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"name": "interface",
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"fw-state": true,
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"comment": "Exclude interface from firewall",
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"dependson": [
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{ "var": "excl-devices", "type": "list", "replace": "$INTERFACE$" }
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],
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"rules": [
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"-A INPUT -i $INTERFACE$ -j ACCEPT",
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"-A OUTPUT -o $INTERFACE$ -j ACCEPT"
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]
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},
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{
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"name": "ipaddress",
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"fw-state": true,
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"comment": "allow access from/to IP",
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"dependson": [
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{ "var": "excluded-ips", "type": "list", "replace": "$IPADDRESS$" }
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],
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"rules": [
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"-A INPUT -s $IPADDRESS$ -j ACCEPT",
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"-A INPUT -d $IPADDRESS$ -j ACCEPT"
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]
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}
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],
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"restriction_rules": [
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{
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"name": "ipaddress",
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"fw-state": true,
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"dependson": [
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{ "var": "restricted-ips", "type": "list", "replace": "$IPADDRESS$" }
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],
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"comment": "Block access from IP-address",
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"rules": [
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"-A INPUT -s $IPADDRESS$ -j DROP"
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]
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}
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]
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}
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174
includes/firewall.php
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174
includes/firewall.php
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@ -0,0 +1,174 @@
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<?php
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require_once 'includes/status_messages.php';
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require_once 'includes/functions.php';
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define(RASPAP_FIREWALL_CONF,"/tmp/iptables.conf");
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define(RASPAP_IPTABLES_CONF,"/etc/raspap/networking/firewall/iptables_rules.json");
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define(RASPAP_IPTABLES_SCRIPT,"/tmp/iptables_raspap.sh");
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function getDependson(&$rule, &$conf) {
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if ( isset($rule["dependson"][0]) ) {
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$don = &$rule["dependson"];
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if ( !empty($don[0]) && isset($conf[$don[0]["var"]]) ) {
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if ( !isset($don[0]["type"]) ) $don[0]["type"]="bool";
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return $don;
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}
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}
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return false;
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}
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function isRuleEnabled(&$sect, &$conf) {
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$fw_on = isset($conf["firewall-enable"]) && $conf["firewall-enable"];
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$active = isset($sect["fw-state"]) && $sect["fw-state"]==1;
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$active = $fw_on ? $active : !$active;
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$active = $active || !isset($sect["fw-state"]);
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if ( ($don = getDependson($sect, $conf)) !== false &&
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$don[0]["type"] == "bool" && !$conf[$don[0]["var"]] ) $active = false;
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return $active;
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}
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function createRuleStr(&$sect, &$conf) {
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if ( !is_array($sect["rules"]) ) return "";
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$rules = $sect["rules"];
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$depon = getDependson($sect,$conf);
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$rs = array();
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foreach ( $rules as $rule ) {
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if ( preg_match('/\$[a-z0-9]*\$/i',$rule) ) {
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$r = array($rule);
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foreach ( $depon as $dep ) {
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$rr = array();
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$repl=$val="";
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switch ( $dep["type"] ) {
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case "list":
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if ( isset($dep["var"]) && !empty($conf[$dep["var"]]) ) $val = explode(',', $conf[$dep["var"]]);
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if ( !empty($val) && isset($dep["replace"]) ) $repl=$dep["replace"];
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break;
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case "string":
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if ( isset($dep["var"]) ) $val=$conf[$dep["var"]];
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if ( !empty($val) && isset($dep["replace"]) ) $repl=$dep["replace"];
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break;
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default:
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break;
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}
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if ( !empty($repl) && !empty($val) ) {
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//echo "replace $repl $val \n"; //print_r( $val); echo "\n";
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if ( is_array($val) ) {
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foreach ( $val as $v ) $rr = array_merge($rr,str_replace($repl, $v, $r));
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}
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else $rr = array_merge($rr, str_replace($repl, $val, $r));
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}
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$r = !empty($rr) ? $rr : $r;
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}
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$rs = array_merge($rs,$rr);
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} else {
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$rs[] = $rule;
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}
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}
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$str="";
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foreach ( $rs as $r ) {
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if ( !preg_match('/\$[a-z0-9]*\$/i',$r) ) $str .= "iptables ".$r."\n";
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}
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return $str;
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}
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function setFirewall() {
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$json = file_get_contents(RASPAP_IPTABLES_CONF);
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$ipt = json_decode($json, true);
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$conf = ReadFirewallConf();
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//echo "<pre>";
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// print_r($ipt);
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$txt = "#!/bin/bash\n";
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$txt .= "iptables -F\n";
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$txt .= "iptables -X\n";
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$txt .= "iptables -t nat -F\n";
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file_put_contents(RASPAP_IPTABLES_SCRIPT, $txt);
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if ( empty($conf) || empty($ipt) ) return false;
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$count=0;
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foreach ( $ipt["order"] as $idx ) {
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if ( isset($ipt[$idx]) ) {
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// echo "Handle $idx \n";
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foreach ( $ipt[$idx] as $i => $sect ) {
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if ( isRuleEnabled($sect, $conf) ) {
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// echo " rule $i name ".$sect["name"]."\n";
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$str_rules= createRuleStr($sect, $conf);
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if ( !empty($str_rules) ) {
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file_put_contents(RASPAP_IPTABLES_SCRIPT, $str_rules, FILE_APPEND);
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++$count;
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}
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}
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}
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}
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}
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// echo "Firewall ON";
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//echo "</pre>";
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if ( $count > 0 ) {
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exec("chmod +x ".RASPAP_IPTABLES_SCRIPT);
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exec("sudo ".RASPAP_IPTABLES_SCRIPT);
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// exec("sudo iptables-save > /etc/iptables/rules.v4");
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// unlink(RASPAP_IPTABLES_SCRIPT);
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}
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return ($count > 0);
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}
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function WriteFirewallConf($conf) {
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if ( is_array($conf) ) write_php_ini($conf,RASPAP_FIREWALL_CONF);
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}
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function ReadFirewallConf() {
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if ( file_exists(RASPAP_FIREWALL_CONF) ) {
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$conf = parse_ini_file(RASPAP_FIREWALL_CONF);
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} else {
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$conf = array();
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$conf["firewall-enable"] = false;
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$conf["openvpn-enable"] = false;
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$conf["openvpn-serverip"] = "";
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$conf["wireguard-enable"] = false;
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$conf["wireguard-serverip"] = "";
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$conf["ssh-enable"] = false;
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$conf["http-enable"] = false;
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$conf["excl-devices"] = "";
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$conf["excluded-ips"] = "";
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$conf["ap-device"] = "";
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$conf["client-device"] = "";
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$conf["restricted-ips"] = "";
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}
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return $conf;
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}
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function DisplayFirewallConfig()
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{
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$status = new StatusMessages();
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$json = file_get_contents(RASPAP_IPTABLES_CONF);
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$ipt_rules = json_decode($json, true);
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getWifiInterface();
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$ap_device = $_SESSION['ap_interface'];
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$clients = getClients();
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$fw_conf = ReadFirewallConf();
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$fw_conf["ap-device"] = $ap_device;
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$id=findCurrentClientIndex($clients);
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if ( $id >= 0 ) $fw_conf["client-device"] = $clients["device"][$id]["name"];
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if (!empty($_POST)) {
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$fw_conf["ssh-enable"] = isset($_POST['ssh-enable']);
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$fw_conf["http-enable"] = isset($_POST['http-enable']);
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$fw_conf["firewall-enable"] = isset($_POST['firewall-enable']) || isset($_POST['apply-firewall']);
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if ( isset($_POST['firewall-enable']) ) $status->addMessage(_('Firewall is now enabled'), 'success');
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if ( isset($_POST['apply-firewall']) ) $status->addMessage(_('Firewall settings changed'), 'success');
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if ( isset($_POST['firewall-disable']) ) $status->addMessage(_('Firewall is now disabled'), 'warning');
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if ( isset($_POST['save-firewall']) ) $status->addMessage(_('Firewall settings saved. Firewall is still disabled.'), 'success');
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WriteFirewallConf($fw_conf);
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setFirewall();
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}
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echo renderTemplate("firewall", compact(
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"status",
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"ap_device",
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"clients",
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"fw_conf",
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"ipt_rules")
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);
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}
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@ -62,3 +62,4 @@ www-data ALL=(ALL) NOPASSWD:/bin/cat /etc/wireguard/*.conf
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www-data ALL=(ALL) NOPASSWD:/bin/cat /etc/wireguard/wg-*.key
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www-data ALL=(ALL) NOPASSWD:/bin/cat /etc/wireguard/wg-*.key
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www-data ALL=(ALL) NOPASSWD:/bin/rm /etc/wireguard/*.conf
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www-data ALL=(ALL) NOPASSWD:/bin/rm /etc/wireguard/*.conf
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www-data ALL=(ALL) NOPASSWD:/bin/rm /etc/wireguard/wg-*.key
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www-data ALL=(ALL) NOPASSWD:/bin/rm /etc/wireguard/wg-*.key
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www-data ALL=(ALL) NOPASSWD:/tmp/iptables_raspap.sh
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70
templates/firewall.php
Normal file
70
templates/firewall.php
Normal file
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@ -0,0 +1,70 @@
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<div class="row">
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<div class="col-lg-12">
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<div class="card">
|
||||||
|
<div class="card-header">
|
||||||
|
<div class="row">
|
||||||
|
<div class="col">
|
||||||
|
<i class="fas fa-shield-alt mr-2"></i><?php echo _("Firewall"); ?>
|
||||||
|
</div>
|
||||||
|
</div><!-- /.row -->
|
||||||
|
</div><!-- /.card-header -->
|
||||||
|
<div class="card-body">
|
||||||
|
<?php $status->showMessages(); ?>
|
||||||
|
<h4><?php echo _("Client Firewall"); ?></h4>
|
||||||
|
<?php if ( $fw_conf["firewall-enable"]) : ?>
|
||||||
|
<i class="fas fa-circle mr-2 service-status-up"></i><?php echo _("Firewall is ENABLED"); ?>
|
||||||
|
<?php else : ?>
|
||||||
|
<i class="fas fa-circle mr-2 service-status-down"></i><?php echo _("Firewall is OFF "); ?>
|
||||||
|
<?php endif ?>
|
||||||
|
<div class="row">
|
||||||
|
<div class="col-md-6">
|
||||||
|
<p class="mr-2"><small><?php echo _("The default firewall will allow only outgoing and already established traffic. No UDP traffic is allowed.") ?></small></p>
|
||||||
|
</div>
|
||||||
|
</div>
|
||||||
|
|
||||||
|
<form id="frm-firewall" action="firewall_conf" method="POST" >
|
||||||
|
<?php echo CSRFTokenFieldTag(); ?>
|
||||||
|
<h5><?php echo _("Exceptions for Services"); ?></h4>
|
||||||
|
<div class="row">
|
||||||
|
<div class="form-group col-md-6">
|
||||||
|
<div class="custom-control custom-switch">
|
||||||
|
<input class="custom-control-input" id="ssh-enable" type="checkbox" name="ssh-enable" value="1" aria-describedby="exceptions-description" <?php if ($fw_conf["ssh-enable"]) echo "checked"; ?> >
|
||||||
|
<label class="custom-control-label" for="ssh-enable"><?php echo _("allow SSH access on port 22") ?></label>
|
||||||
|
</div>
|
||||||
|
<div class="custom-control custom-switch">
|
||||||
|
<input class="custom-control-input" id="http-enable" type="checkbox" name="http-enable" value="1" aria-describedby="exceptions-description" <?php if ($fw_conf["http-enable"]) echo "checked"; ?> >
|
||||||
|
<label class="custom-control-label" for="http-enable"><?php echo _("allow access to the RaspAP GUI") ?></label>
|
||||||
|
</div>
|
||||||
|
<p class="mb-0" id="exceptions-description">
|
||||||
|
<small><?php echo _("Allow access for some services from the client side.") ?></small>
|
||||||
|
</p>
|
||||||
|
</div>
|
||||||
|
</div>
|
||||||
|
<?php if ($fw_conf["firewall-enable"]) : ?>
|
||||||
|
<input type="submit" class="btn btn-outline btn-primary" value="<?php echo _("Apply changes"); ?>" name="apply-firewall" />
|
||||||
|
<input type="submit" class="btn btn-warning firewall-apply" value="<?php echo _("Disable Firewall") ?>" name="firewall-disable" data-toggle="modal" data-target="#firewallModal"/>
|
||||||
|
<?php else : ?>
|
||||||
|
<input type="submit" class="btn btn-outline btn-primary" value="<?php echo _("Save"); ?>" name="save-firewall" />
|
||||||
|
<input type="submit" class="btn btn-success firewall-apply" value="<?php echo _("Enable Firewall") ?>" name="firewall-enable" data-toggle="modal" data-target="#firewallModal"/>
|
||||||
|
<?php endif ?>
|
||||||
|
</form>
|
||||||
|
</div><!-- /.card-body -->
|
||||||
|
<div class="card-footer"></div>
|
||||||
|
</div><!-- /.card -->
|
||||||
|
</div><!-- /.col-lg-12 -->
|
||||||
|
</div><!-- /.row -->
|
||||||
|
|
||||||
|
<!-- Modal -->
|
||||||
|
<div class="modal fade" id="firewallModal" tabindex="-1" role="dialog" aria-labelledby="ModalLabel" aria-hidden="true">
|
||||||
|
<div class="modal-dialog" role="document">
|
||||||
|
<div class="modal-content">
|
||||||
|
<div class="modal-header">
|
||||||
|
<div class="modal-title" id="ModalLabel">
|
||||||
|
<i class="fas fa-sync-alt mr-2"></i>
|
||||||
|
<?php if($fw_conf["firewall-enable"]) echo _("Disable the firewall ..."); else echo _("Enable the Firewall ..."); ?>
|
||||||
|
</div>
|
||||||
|
<button type="button" class="close" data-dismiss="modal" aria-label="Close"> <span aria-hidden="true">×</span>
|
||||||
|
</div>
|
||||||
|
</div>
|
||||||
|
</div>
|
||||||
|
|
||||||
Loading…
Reference in a new issue