diff --git a/indra/llplugin/llpluginprocessparent.cpp b/indra/llplugin/llpluginprocessparent.cpp
index 110fac0f23..d56bb7aa66 100644
--- a/indra/llplugin/llpluginprocessparent.cpp
+++ b/indra/llplugin/llpluginprocessparent.cpp
@@ -34,6 +34,8 @@
 
 #include "llapr.h"
 
+#include "llrand.h" // <ND/> FIRE-3877; So we can choose a random port number
+
 //virtual 
 LLPluginProcessParentOwner::~LLPluginProcessParentOwner()
 {
@@ -164,8 +166,13 @@ void LLPluginProcessParent::init(const std::string &launcher_filename, const std
 	mPluginFile = plugin_filename;
 	mPluginDir = plugin_dir;
 	mCPUUsage = 0.0f;
-	mDebug = debug;	
+	mDebug = debug;
 	setState(STATE_INITIALIZED);
+
+	// <ND> FIRE-3877; Port 0 = choose one for use as default. This was the standard behaviour of LLPluginProcessParent and the reasonable thing to do.
+	mPortToBind = 0;
+	mBindRetries = 0;
+	// </ND>
 }
 
 bool LLPluginProcessParent::accept()
@@ -274,7 +281,6 @@ void LLPluginProcessParent::idle(void)
 
 			case STATE_INITIALIZED:
 			{
-	
 				apr_status_t status = APR_SUCCESS;
 				apr_sockaddr_t* addr = NULL;
 				mListenSocket = LLSocket::create(gAPRPoolp, LLSocket::STREAM_TCP);
@@ -286,7 +292,7 @@ void LLPluginProcessParent::idle(void)
 					&addr,
 					"127.0.0.1",
 					APR_INET,
-					0,	// port 0 = ephemeral ("find me a port")
+					mPortToBind,	// port 0 = ephemeral ("find me a port")
 					0,
 					gAPRPoolp);
 					
@@ -324,7 +330,20 @@ void LLPluginProcessParent::idle(void)
 						LL_WARNS("Plugin") << "Bound port number unknown, bailing out." << LL_ENDL;
 						
 						killSockets();
-						errorState();
+
+						// <ND> FIRE-3877;  Some drivers, eg bigfoot. Refuse to tell us which port is used when the socket is bound on port 0 (= choose a free port).
+						// If not out of retry attempts, choose a random port between 5500 - 60000 and try again.
+						if( mBindRetries > 10 ) //In theory we could have bad luck and randomly draft already used ports each try. In practice we already deal with a buggy driver anyway. So just fail instead hogging resources in a loop.
+							errorState();
+						else
+						{
+							++mBindRetries;
+							mPortToBind = ll_rand(55000)+5000; // Ports < 4096 are reserved for root (at least on BSD like systems), do never touch them.
+							setState( STATE_INITIALIZED );
+							idle_again = true; // Just try a new loop to bind the socket
+						}
+						// </ND>
+
 						break;
 					}
 				}
diff --git a/indra/llplugin/llpluginprocessparent.h b/indra/llplugin/llpluginprocessparent.h
index 26c6b0c402..8b9c830f79 100644
--- a/indra/llplugin/llpluginprocessparent.h
+++ b/indra/llplugin/llpluginprocessparent.h
@@ -189,6 +189,11 @@ private:
 	
 	LLMutex mIncomingQueueMutex;
 	std::queue<LLPluginMessage> mIncomingQueue;
+
+	// <ND> FIRE-3877;  Bind to a fixed port. Some network drivers (Bigfoot) refuse to tell us to which port a socket is bound if 0 (= choose one) was used.
+	U32 mPortToBind;
+	U32 mBindRetries;
+	// </ND>
 };
 
 #endif // LL_LLPLUGINPROCESSPARENT_H