diff --git a/dump1090.c b/dump1090.c
index 356c1f5..467676b 100644
--- a/dump1090.c
+++ b/dump1090.c
@@ -116,7 +116,7 @@ void modesInitConfig(void) {
     Modes.net_output_sbs_ports    = strdup("30003");
     Modes.net_input_beast_ports   = strdup("30004,30104");
     Modes.net_output_beast_ports  = strdup("30005");
-    Modes.net_output_stratux_ports= strdup("30006");
+    Modes.net_output_stratux_ports= NULL;
     Modes.interactive_display_ttl = MODES_INTERACTIVE_DISPLAY_TTL;
     Modes.json_interval           = 1000;
     Modes.json_location_accuracy  = 1;
@@ -535,7 +535,8 @@ int main(int argc, char **argv) {
             free(Modes.net_output_sbs_ports);
             Modes.net_output_sbs_ports = strdup(argv[++j]);
         } else if (!strcmp(argv[j],"--net-stratux-port") && more) {
-            free(Modes.net_output_stratux_ports);
+            if (Modes.net_output_stratux_ports)
+                free(Modes.net_output_stratux_ports);
             Modes.net_output_stratux_ports = strdup(argv[++j]);
         } else if (!strcmp(argv[j],"--net-buffer") && more) {
             Modes.net_sndbuf_size = atoi(argv[++j]);
diff --git a/net_io.c b/net_io.c
index 3c5f2ca..408b6b6 100644
--- a/net_io.c
+++ b/net_io.c
@@ -269,8 +269,10 @@ void modesInitNet(void) {
     s = serviceInit("Basestation TCP output", &Modes.sbs_out, send_sbs_heartbeat, READ_MODE_IGNORE, NULL, NULL);
     serviceListen(s, Modes.net_bind_address, Modes.net_output_sbs_ports);
 
-    s = serviceInit("Stratux TCP output", &Modes.stratux_out, send_stratux_heartbeat, READ_MODE_IGNORE, NULL, NULL);
-    serviceListen(s, Modes.net_bind_address, Modes.net_output_stratux_ports);
+    if (Modes.net_output_stratux_ports) {
+        s = serviceInit("Stratux TCP output", &Modes.stratux_out, send_stratux_heartbeat, READ_MODE_IGNORE, NULL, NULL);
+        serviceListen(s, Modes.net_bind_address, Modes.net_output_stratux_ports);
+    }
 
     s = serviceInit("Raw TCP input", NULL, NULL, READ_MODE_ASCII, "\n", decodeHexMessage);
     serviceListen(s, Modes.net_bind_address, Modes.net_input_raw_ports);
@@ -1042,7 +1044,8 @@ void modesQueueOutput(struct modesMessage *mm, struct aircraft *a) {
 
     // Delegate to the format-specific outputs, each of which makes its own decision about filtering messages
     modesSendSBSOutput(mm, a);
-    modesSendStratuxOutput(mm, a);
+    if (Modes.net_output_stratux_ports)
+        modesSendStratuxOutput(mm, a);
     modesSendRawOutput(mm, a);
     modesSendBeastVerbatimOutput(mm, a);
     modesSendBeastCookedOutput(mm, a);