Add a config option to toggle auto IP discovery

docs/source/corda-configuration-file.rst

@@ -134,5 +134,9 @@ path to the node's base directory.
     does not exist, a developer keystore will be used if ``devMode`` is true. The node will exit if ``devMode`` is false
     and keystore does not exist.
 
+:detectPublicIp: This flag toggles the auto IP detection behaviour, it is enabled by default. On startup the node will
+    attempt to discover its externally visible IP address first by looking for any public addresses on its network
+    interfaces, and then by sending an IP discovery request to the network map service. Set to ``false`` to disable.
+
 :certificateSigningService: Certificate Signing Server address. It is used by the certificate signing request utility to
     obtain SSL certificate. (See :doc:`permissioning` for more information.)

node/src/main/kotlin/net/corda/node/internal/Node.kt

@@ -169,8 +169,11 @@ open class Node(override val configuration: FullNodeConfiguration,
 
     private fun getAdvertisedAddress(): HostAndPort {
         return with(configuration) {
-            val publicHost = tryDetectIfNotPublicHost(p2pAddress.host)
-            val useHost = publicHost ?: p2pAddress.host
+            val useHost = if (detectPublicIp) {
+                tryDetectIfNotPublicHost(p2pAddress.host) ?: p2pAddress.host
+            } else {
+                p2pAddress.host
+            }
             HostAndPort.fromParts(useHost, p2pAddress.port)
         }
     }

node/src/main/kotlin/net/corda/node/services/config/NodeConfiguration.kt

@@ -58,7 +58,8 @@ data class FullNodeConfiguration(
         val notaryClusterAddresses: List<HostAndPort>,
         override val certificateChainCheckPolicies: List<CertChainPolicyConfig>,
         override val devMode: Boolean = false,
-        val useTestClock: Boolean = false
+        val useTestClock: Boolean = false,
+        val detectPublicIp: Boolean = true
 ) : NodeConfiguration {
     /** This is not retrieved from the config file but rather from a command line argument. */
     @Suppress("DEPRECATION")