Use $IPTABLESCMD over iptables

e-router

@@ -1,74 +1,77 @@
 #!/bin/bash -x
 ((EUID == 0 )) || { echo "Need root"; exit 1; }
+
 set -euo pipefail
+
 confd=/etc/e-router
+iptables=${IPTABLESCMD:-iptables}
 source $confd/config
 
 set_defaults() {
     /usr/lib/systemd/scripts/iptables-flush
-    iptables -w -v -P FORWARD DROP
-    iptables -w -v -P OUTPUT ACCEPT
-    iptables -w -v -P INPUT DROP
+    ${iptables} -P FORWARD DROP
+    ${iptables} -P OUTPUT ACCEPT
+    ${iptables} -P INPUT DROP
 }
 
 setup_final(){
     if $loginput ; then
         setup_wandroplog
-        iptables -w -v -A INPUT -j WAN-LOG-DROP
+        ${iptables} -A INPUT -j WAN-LOG-DROP
     else
-        iptables -w -v -A INPUT -j DROP
+        ${iptables} -A INPUT -j DROP
     fi
 }
 
 setup_wandroplog() {
-    iptables -w -v -N WAN-LOG-DROP
+    ${iptables} -N WAN-LOG-DROP
     if $debugtcp; then
-        iptables -w -v -A WAN-LOG-DROP -p tcp  -j LOG --log-prefix  "WAN-LOG-DROP TCP: " --log-level 7
-        iptables -w -v -A WAN-LOG-DROP -p tcp -j REJECT --reject-with tcp-reset
+        ${iptables} -A WAN-LOG-DROP -p tcp  -j LOG --log-prefix  "WAN-LOG-DROP TCP: " --log-level 7
+        ${iptables} -A WAN-LOG-DROP -p tcp -j REJECT --reject-with tcp-reset
     fi
     if $debugudp; then
-        iptables -w -v -A WAN-LOG-DROP -p udp  -j LOG --log-prefix  "WAN-LOG-DROP UDP: " --log-level 7
-        iptables -w -v -A WAN-LOG-DROP -p udp -j REJECT --reject-with icmp-port-unreachable
+        ${iptables} -A WAN-LOG-DROP -p udp  -j LOG --log-prefix  "WAN-LOG-DROP UDP: " --log-level 7
+        ${iptables} -A WAN-LOG-DROP -p udp -j REJECT --reject-with icmp-port-unreachable
     fi
     if $debugicmp; then
-        iptables -w -v -A WAN-LOG-DROP -p icmp -j LOG --log-prefix  "WAN-LOG-DROP ICMP: " --log-level 7
-        iptables -w -v -A WAN-LOG-DROP -j REJECT --reject-with icmp-proto-unreachable
+        ${iptables} -A WAN-LOG-DROP -p icmp -j LOG --log-prefix  "WAN-LOG-DROP ICMP: " --log-level 7
+        ${iptables} -A WAN-LOG-DROP -j REJECT --reject-with icmp-proto-unreachable
     fi
 }
 
 setup_fordroplog() {
-    iptables -w -v -N FORWARD-LOG-DROP
+    ${iptables} -N FORWARD-LOG-DROP
     if $debugtcp; then
-        iptables -w -v -A FORWARD-LOG-DROP -p tcp  -j LOG --log-prefix "FORWARD-LOG-DROP TCP: " --log-level 7
-        iptables -w -v -A FORWARD-LOG-DROP -p tcp -j REJECT --reject-with tcp-reset
+        ${iptables} -A FORWARD-LOG-DROP -p tcp  -j LOG --log-prefix "FORWARD-LOG-DROP TCP: " --log-level 7
+        ${iptables} -A FORWARD-LOG-DROP -p tcp -j REJECT --reject-with tcp-reset
     fi
     if $debugudp; then
-        iptables -w -v -A FORWARD-LOG-DROP -p udp  -j LOG --log-prefix "FORWARD-LOG-DROP UDP: " --log-level 7
-        iptables -w -v -A FORWARD-LOG-DROP -p udp -j REJECT --reject-with icmp-port-unreachable
+        ${iptables} -A FORWARD-LOG-DROP -p udp  -j LOG --log-prefix "FORWARD-LOG-DROP UDP: " --log-level 7
+        ${iptables} -A FORWARD-LOG-DROP -p udp -j REJECT --reject-with icmp-port-unreachable
     fi
     if $debugicmp; then
-        iptables -w -v -A FORWARD-LOG-DROP -p icmp -j LOG --log-prefix "FORWARD-LOG-DROP ICMP: " --log-level 7
-        iptables -w -v -A FORWARD-LOG-DROP -j REJECT --reject-with icmp-proto-unreachable
+        ${iptables} -A FORWARD-LOG-DROP -p icmp -j LOG --log-prefix "FORWARD-LOG-DROP ICMP: " --log-level 7
+        ${iptables} -A FORWARD-LOG-DROP -j REJECT --reject-with icmp-proto-unreachable
     fi
 }
 
 setup_nat() {
-    iptables -w -v -t nat -A POSTROUTING -o ${wan} -s ${locnet} -j MASQUERADE
+    ${iptables} -t nat -A POSTROUTING -o ${wan} -s ${locnet} -j MASQUERADE
 }
 
 setup_forward() {
-    iptables -w -v -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-    iptables -w -v -A FORWARD -i ${eth0} -o ${wan} -j ACCEPT
+    ${iptables} -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
+    ${iptables} -A FORWARD -i ${eth0} -o ${wan} -j ACCEPT
     while read -r ip public private ; do
         [[ "$ip" =~ ^[0-9]{1,}.[0-9]{1,}.[0-9]{1,}.[0-9]{1,}$ ]] || continue
         [[ "$public" =~ ^[0-9]{1,}|[0-9]{1,}:[0-9]{1,}$ ]] || continue
         [[ "$private" =~ ^[0-9]{1,}|[0-9]{1,}:[0-9]{1,}$ ]] || continue
         if [[ "$public" =~ ^[0-9]{1,}$ ]] ; then
-            iptables -w -v -A PREROUTING -t nat -i ${wan} -p tcp --dport ${public} -j DNAT --to ${ip}:${private}
-            iptables -w -v -A FORWARD -i ${wan} -p tcp --syn -d ${ip} --dport ${private} -m conntrack --ctstate NEW --ctproto TCP -j ACCEPT
+            ${iptables} -A PREROUTING -t nat -i ${wan} -p tcp --dport ${public} -j DNAT --to ${ip}:${private}
+            ${iptables} -A FORWARD -i ${wan} -p tcp --syn -d ${ip} --dport ${private} -m conntrack --ctstate NEW --ctproto TCP -j ACCEPT
         else
-            iptables -w -v -A PREROUTING -t nat -i ${wan} -p tcp --dport ${public} -j DNAT --to ${ip}
-            iptables -w -v -A FORWARD -i ${wan} -p tcp --syn -d ${ip} --dport ${public} -m conntrack --ctstate NEW --ctproto TCP -j ACCEPT
+            ${iptables} -A PREROUTING -t nat -i ${wan} -p tcp --dport ${public} -j DNAT --to ${ip}
+            ${iptables} -A FORWARD -i ${wan} -p tcp --syn -d ${ip} --dport ${public} -m conntrack --ctstate NEW --ctproto TCP -j ACCEPT
         fi
     done < $confd/FORWARD.tcp
 
@@ -77,27 +80,27 @@ setup_forward() {
         [[ "$public" =~ ^[0-9]{1,}|[0-9]{1,}:[0-9]{1,}$ ]] || continue
         [[ "$private" =~ ^[0-9]{1,}|[0-9]{1,}:[0-9]{1,}$ ]] || continue
         if [[ "$public" =~ ^[0-9]{1,}$ ]] ; then
-            iptables -w -v -A PREROUTING -t nat -i ${wan} -p udp --dport ${public} -j DNAT --to ${ip}:${private}
-            iptables -w -v -A FORWARD -i ${wan} -p udp -d ${ip} --dport ${private} -m conntrack --ctstate NEW --ctproto UDP -j ACCEPT
+            ${iptables} -A PREROUTING -t nat -i ${wan} -p udp --dport ${public} -j DNAT --to ${ip}:${private}
+            ${iptables} -A FORWARD -i ${wan} -p udp -d ${ip} --dport ${private} -m conntrack --ctstate NEW --ctproto UDP -j ACCEPT
         else
-            iptables -w -v -A PREROUTING -t nat -i ${wan} -p udp --dport ${public} -j DNAT --to ${ip}
-            iptables -w -v -A FORWARD -i ${wan} -p udp -d ${ip} --dport ${public} -m conntrack --ctstate NEW --ctproto UDP -j ACCEPT
+            ${iptables} -A PREROUTING -t nat -i ${wan} -p udp --dport ${public} -j DNAT --to ${ip}
+            ${iptables} -A FORWARD -i ${wan} -p udp -d ${ip} --dport ${public} -m conntrack --ctstate NEW --ctproto UDP -j ACCEPT
         fi
     done < $confd/FORWARD.udp
 
     if $logforward ; then
         setup_fordroplog
-        iptables -w -v -A FORWARD -j FORWARD-LOG-DROP
+        ${iptables} -A FORWARD -j FORWARD-LOG-DROP
     else
-        iptables -w -v -A FORWARD -j DROP
+        ${iptables} -A FORWARD -j DROP
     fi
 }
 
 setup_base() {
-    iptables -w -v -A INPUT -i lo -j ACCEPT
-    iptables -w -v -A INPUT -i ${eth0} -j ACCEPT
-    iptables -w -v -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-    iptables -w -v -A INPUT -m conntrack --ctstate INVALID -j DROP
+    ${iptables} -A INPUT -i lo -j ACCEPT
+    ${iptables} -A INPUT -i ${eth0} -j ACCEPT
+    ${iptables} -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
+    ${iptables} -A INPUT -m conntrack --ctstate INVALID -j DROP
 }
 
 setup_whitenets() {
@@ -110,50 +113,50 @@ setup_whitenets() {
 
 setup_badips() {
     ipset create -! $banset hash:ip hashsize 4096 timeout $banttl  maxelem $badmaxelems
-    iptables -w -v -A INPUT -i ${wan} -p udp -m set --match-set $banset src -m conntrack --ctstate NEW --ctproto UDP -j REJECT --reject-with icmp-port-unreachable
-    iptables -w -v -A INPUT -i ${wan} -p tcp -m set --match-set $banset src -m conntrack --ctstate NEW --ctproto TCP -j REJECT --reject-with tcp-reset
+    ${iptables} -A INPUT -i ${wan} -p udp -m set --match-set $banset src -m conntrack --ctstate NEW --ctproto UDP -j REJECT --reject-with icmp-port-unreachable
+    ${iptables} -A INPUT -i ${wan} -p tcp -m set --match-set $banset src -m conntrack --ctstate NEW --ctproto TCP -j REJECT --reject-with tcp-reset
 }
 
 setup_scanips() {
     ipset create -! $scanset hash:ip hashsize 4096 timeout $scanttl  maxelem $scanmaxelems
-    iptables -w -v -A INPUT -i ${wan} -p udp -m set --match-set $scanset src -m conntrack --ctstate NEW --ctproto UDP -j REJECT --reject-with icmp-port-unreachable
-    iptables -w -v -A INPUT -i ${wan} -p tcp -m set --match-set $scanset src -m conntrack --ctstate NEW --ctproto TCP -j REJECT --reject-with tcp-reset
+    ${iptables} -A INPUT -i ${wan} -p udp -m set --match-set $scanset src -m conntrack --ctstate NEW --ctproto UDP -j REJECT --reject-with icmp-port-unreachable
+    ${iptables} -A INPUT -i ${wan} -p tcp -m set --match-set $scanset src -m conntrack --ctstate NEW --ctproto TCP -j REJECT --reject-with tcp-reset
 }
 
 setup_white() {
-    iptables -w -v -N FW-FILTERED
+    ${iptables} -N FW-FILTERED
     while read -r port ; do
         [[ "$port" =~ ^[0-9]{1,}$ ]] || continue
-        iptables -w -v -A FW-FILTERED -p udp -m conntrack --ctstate NEW --ctproto UDP --dport $port -j ACCEPT
+        ${iptables} -A FW-FILTERED -p udp -m conntrack --ctstate NEW --ctproto UDP --dport $port -j ACCEPT
     done < $confd/WHITE.udp
     while read -r port ; do
         [[ "$port" =~ ^[0-9]{1,}$ ]] || continue
-        iptables -w -v -A FW-FILTERED -p tcp -m conntrack --ctstate NEW --ctproto TCP --dport $port -j ACCEPT
+        ${iptables} -A FW-FILTERED -p tcp -m conntrack --ctstate NEW --ctproto TCP --dport $port -j ACCEPT
     done < $confd/WHITE.tcp
-    iptables -w -v -A INPUT -i ${wan} -p udp -m set --match-set $whiteset src -m conntrack --ctstate NEW --ctproto UDP -j FW-FILTERED
-    iptables -w -v -A INPUT -i ${wan} -p tcp -m set --match-set $whiteset src -m conntrack --ctstate NEW --ctproto TCP -j FW-FILTERED
-    iptables -w -v -A INPUT -i ${wan} -p icmp --icmp-type 8 -m set --match-set $whiteset src -m conntrack --ctstate NEW --ctproto ICMP -j ACCEPT
+    ${iptables} -A INPUT -i ${wan} -p udp -m set --match-set $whiteset src -m conntrack --ctstate NEW --ctproto UDP -j FW-FILTERED
+    ${iptables} -A INPUT -i ${wan} -p tcp -m set --match-set $whiteset src -m conntrack --ctstate NEW --ctproto TCP -j FW-FILTERED
+    ${iptables} -A INPUT -i ${wan} -p icmp --icmp-type 8 -m set --match-set $whiteset src -m conntrack --ctstate NEW --ctproto ICMP -j ACCEPT
 }
 
 setup_public() {
-    iptables -w -v -N FW-PUBLIC
+    ${iptables} -N FW-PUBLIC
     while read -r port ; do
         [[ "$port" =~ ^[0-9]{1,}$ ]] || continue
-        iptables -w -v -A FW-PUBLIC -p udp -m conntrack --ctstate NEW --ctproto UDP --dport $port -j ACCEPT
+        ${iptables} -A FW-PUBLIC -p udp -m conntrack --ctstate NEW --ctproto UDP --dport $port -j ACCEPT
     done < $confd/PUBLIC.udp
     while read -r port ; do
         [[ "$port" =~ ^[0-9]{1,}$ ]] || continue
-        iptables -w -v -A FW-PUBLIC -p tcp -m conntrack --ctstate NEW --ctproto TCP --dport $port -j ACCEPT
+        ${iptables} -A FW-PUBLIC -p tcp -m conntrack --ctstate NEW --ctproto TCP --dport $port -j ACCEPT
     done < $confd/PUBLIC.tcp
-    iptables -w -v -A INPUT -i ${wan} -p udp -m conntrack --ctstate NEW --ctproto UDP -j FW-PUBLIC
-    iptables -w -v -A INPUT -i ${wan} -p tcp -m conntrack --ctstate NEW --ctproto TCP -j FW-PUBLIC
+    ${iptables} -A INPUT -i ${wan} -p udp -m conntrack --ctstate NEW --ctproto UDP -j FW-PUBLIC
+    ${iptables} -A INPUT -i ${wan} -p tcp -m conntrack --ctstate NEW --ctproto TCP -j FW-PUBLIC
 }
 
 setup_cast() {
-    iptables -w -v -N FW-CAST
-    iptables -w -v -A FW-CAST -m pkttype --pkt-type broadcast -j ACCEPT
-    iptables -w -v -A FW-CAST -m pkttype --pkt-type multicast -j ACCEPT
-    iptables -w -v -A INPUT -i ${wan} -j FW-CAST
+    ${iptables} -N FW-CAST
+    ${iptables} -A FW-CAST -m pkttype --pkt-type broadcast -j ACCEPT
+    ${iptables} -A FW-CAST -m pkttype --pkt-type multicast -j ACCEPT
+    ${iptables} -A INPUT -i ${wan} -j FW-CAST
 }
 
 main () {