SIP firewall

src/freedombone

   echo 'configure_firewall_for_voip' >> $COMPLETION_FILE
 }
 
+function configure_firewall_for_sip {
+  if [[ $SYSTEM_TYPE == "$VARIANT_WRITER" || $SYSTEM_TYPE == "$VARIANT_MAILBOX" || $SYSTEM_TYPE == "$VARIANT_CLOUD" || $SYSTEM_TYPE == "$VARIANT_SOCIAL" || $SYSTEM_TYPE == "$VARIANT_MEDIA" || $SYSTEM_TYPE == "$VARIANT_DEVELOPER" ]]; then
+      return
+  fi
+  if grep -Fxq "configure_firewall_for_sip" $COMPLETION_FILE; then
+      return
+  fi
+  iptables -A INPUT -p udp --dport $SIP_PORT -j ACCEPT
+  iptables -A INPUT -p tcp --dport $SIP_PORT -j ACCEPT
+  save_firewall_settings
+  echo 'configure_firewall_for_sip' >> $COMPLETION_FILE
+}
+
 function configure_firewall_for_ipfs {
   if [[ $SYSTEM_TYPE == "$VARIANT_MAILBOX" || $SYSTEM_TYPE == "$VARIANT_CHAT" ]]; then
       return
 configure_firewall_for_ftp
 configure_firewall_for_web_access
 configure_firewall_for_voip
+configure_firewall_for_sip
 configure_firewall_for_avahi
 configure_firewall_for_zeronet
 configure_firewall_for_ipfs