From d73f5a6785b407078ea153f75f1f579249ede95d Mon Sep 17 00:00:00 2001
From: Bob Mottram <bob@freedombone.net>
Date: Mon, 25 Sep 2017 14:28:18 +0100
Subject: [PATCH] cron entry to update external IP for vpn
---
src/freedombone-utils-firewall | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/src/freedombone-utils-firewall b/src/freedombone-utils-firewall
index e23943abd..be7beb57f 100755
--- a/src/freedombone-utils-firewall
+++ b/src/freedombone-utils-firewall
@@ -110,11 +110,27 @@ function enable_ipv6 {
echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
}
+function firewall_update_external_ip {
+ ip_update_script=/usr/bin/externalipupdate
+ echo '#!/bin/bash' >> $ip_update_script
+ echo "existing_ip=\$(cat $CONFIGURATION_FILE | grep \"EXTERNAL_IPV4_ADDRESS=\" | head -n 1 | awk -F '=' '{print \$2}')'" >> $ip_update_script
+ echo "curr_ip=\$(nslookup . $EXTERNAL_IP_LOOKUP_URL | grep Address | tail -n 1 | awk -F ' ' '{print \$2}')" >> $ip_update_script
+ echo 'if [[ "$curr_ip" != "$existing_ip" ]]; then' >> $ip_update_script
+ echo " sed -i \"s|EXTERNAL_IPV4_ADDRESS=.*|EXTERNAL_IPV4_ADDRESS=\${curr_ip}|g\" $CONFIGURATION_FILE" >> $ip_update_script
+ echo " iptables -t nat -D POSTROUTING -s \${curr_ip}/24 -o ${FIREWALL_EIFACE} -j MASQUERADE" >> $ip_update_script
+ echo " iptables -t nat -A POSTROUTING -s \${curr_ip}/24 -o ${FIREWALL_EIFACE} -j MASQUERADE" >> $ip_update_script
+ echo ' iptables-save > /etc/firewall.conf' >> $ip_update_script
+ echo 'fi' >> $ip_update_script
+
+ cron_add_mins 10 $ip_update_script
+}
+
function firewall_disable_vpn {
read_config_param EXTERNAL_IPV4_ADDRESS
if [ ! $EXTERNAL_IPV4_ADDRESS ]; then
return
fi
+ sed -i '/externalipupdate/d' /etc/crontab
iptables -D INPUT -i ${FIREWALL_EIFACE} -m state --state NEW -p udp --dport 1194 -j ACCEPT
iptables -D INPUT -i tun+ -j ACCEPT
iptables -D FORWARD -i tun+ -j ACCEPT
@@ -136,6 +152,8 @@ function firewall_enable_vpn {
iptables -A OUTPUT -o tun+ -j ACCEPT
write_config_param EXTERNAL_IPV4_ADDRESS "$curr_external_ipv4_address"
save_firewall_settings
+
+ firewall_update_external_ip
}
function configure_firewall {
--
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