diff --git a/src/detect-engine-port.c b/src/detect-engine-port.c
index 9959b18ea6..cb5678d4b8 100644
--- a/src/detect-engine-port.c
+++ b/src/detect-engine-port.c
@@ -39,6 +39,7 @@ void DetectPortRegister (void) {
 static int DetectPortCutNot(DetectPort *, DetectPort **);
 static int DetectPortCut(DetectEngineCtx *, DetectPort *, DetectPort *, DetectPort **);
 DetectPort *PortParse(char *str);
+int DetectPortIsValidRange(char *);
 
 /* memory usage counters */
 static uint32_t detect_port_memory = 0;
@@ -1132,11 +1133,20 @@ DetectPort *PortParse(char *str) {
         /* 80:81 range format */
         port[port2 - port] = '\0';
         port2++;
-        dp->port = atoi(port);
-        if (strcmp(port2,"") != 0)
-            dp->port2 = atoi(port2);
+
+        if(DetectPortIsValidRange(port))
+            dp->port = atoi(port);
         else
+            goto error;
+
+        if (strcmp(port2,"") != 0){
+            if(DetectPortIsValidRange(port2))
+                dp->port2 = atoi(port2);
+            else
+                goto error;
+        } else {
             dp->port2 = 65535;
+        }
 
         /* a>b is illegal, a=b is ok */
         if (dp->port > dp->port2)
@@ -1146,8 +1156,10 @@ DetectPort *PortParse(char *str) {
         if (strcasecmp(port,"any") == 0) {
             dp->port = 0;
             dp->port2 = 65535;
-        } else {
+        } else if(DetectPortIsValidRange(port)){
             dp->port = dp->port2 = atoi(port);
+        } else {
+            goto error;
         }
     }
 
@@ -1159,6 +1171,13 @@ error:
     return NULL;
 }
 
+int DetectPortIsValidRange(char *port){
+    if(atoi(port) >= 0 && atoi(port) <= 65535)
+        return 1;
+    else
+        return 0;
+}
+
 /* end parsing routines */
 
 /* init hashes */
@@ -1439,8 +1458,61 @@ int PortTestParse09 (void) {
 end:
     return result;
 }
-#endif /* UNITTESTS */
 
+/** \test Test port that is too big */
+int PortTestParse10 (void) {
+    DetectPort *dd = NULL;
+    int result = 0;
+
+    int r = DetectPortParse(&dd,"777777777777777777777777777777777777777777777777777777777");
+    if (r != 0) {
+        result = 1 ;
+        goto end;
+    }
+
+    DetectPortFree(dd);
+
+end:
+    return result;
+
+}
+
+/** \test Test second port of range being too big */
+int PortTestParse11 (void) {
+    DetectPort *dd = NULL;
+    int result = 0;
+
+    int r = DetectPortParse(&dd,"1024:65536");
+    if (r != 0) {
+        result = 1 ;
+        goto end;
+    }
+
+    DetectPortFree(dd);
+
+end:
+    return result;
+
+}
+
+/** \test Test second port of range being just right */
+int PortTestParse12 (void) {
+    DetectPort *dd = NULL;
+    int result = 0;
+
+    int r = DetectPortParse(&dd,"1024:65535");
+    if (r != 0) {
+        goto end;
+    }
+
+    DetectPortFree(dd);
+
+    result = 1 ;
+end:
+    return result;
+
+}
+#endif /* UNITTESTS */
 
 void DetectPortTests(void) {
 #ifdef UNITTESTS
@@ -1453,6 +1525,9 @@ void DetectPortTests(void) {
     UtRegisterTest("PortTestParse07", PortTestParse07, 1);
     UtRegisterTest("PortTestParse08", PortTestParse08, 1);
     UtRegisterTest("PortTestParse09", PortTestParse09, 1);
+    UtRegisterTest("PortTestParse10", PortTestParse10, 1);
+    UtRegisterTest("PortTestParse11", PortTestParse11, 1);
+    UtRegisterTest("PortTestParse12", PortTestParse12, 1);
 #endif /* UNITTESTS */
 }
 
diff --git a/src/detect-parse.c b/src/detect-parse.c
index e9cfe116b5..20e43331d1 100644
--- a/src/detect-parse.c
+++ b/src/detect-parse.c
@@ -583,7 +583,7 @@ int SigParseTest03 (void) {
     if (de_ctx == NULL)
         goto end;
 
-    sig = SigInit(de_ctx, "alert tcp 1.2.3.4 any <- !1.2.3.4 any (msg:\"SigParseTest01\"; sid:1;)");
+    sig = SigInit(de_ctx, "alert tcp 1.2.3.4 any <- !1.2.3.4 any (msg:\"SigParseTest03\"; sid:1;)");
     if (sig != NULL) {
         result = 0;
         printf("expected NULL got sig ptr %p: ",sig);
@@ -604,7 +604,7 @@ int SigParseTest04 (void) {
     if (de_ctx == NULL)
         goto end;
 
-    sig = SigInit(de_ctx, "alert tcp 1.2.3.4 1024: -> !1.2.3.4 1024: (msg:\"SigParseTest03\"; sid:1;)");
+    sig = SigInit(de_ctx, "alert tcp 1.2.3.4 1024: -> !1.2.3.4 1024: (msg:\"SigParseTest04\"; sid:1;)");
     if (sig == NULL) {
         result = 0;
         goto end;
@@ -616,6 +616,27 @@ end:
     return result;
 }
 
+/** \test Port validation */
+int SigParseTest05 (void) {
+    int result = 1;
+    Signature *sig = NULL;
+
+    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
+    if (de_ctx == NULL)
+        goto end;
+
+    sig = SigInit(de_ctx, "alert tcp 1.2.3.4 1024:65536 -> !1.2.3.4 any (msg:\"SigParseTest05\"; sid:1;)");
+    if (sig != NULL) {
+        result = 1;
+        SigFree(sig);
+        goto end;
+    }
+
+    DetectEngineCtxFree(de_ctx);
+end:
+    return result;
+}
+
 /**
  * \test check that we don't allow invalid negation options
  */
@@ -800,6 +821,7 @@ void SigParseRegisterTests(void) {
     UtRegisterTest("SigParseTest02", SigParseTest02, 1);
     UtRegisterTest("SigParseTest03", SigParseTest03, 1);
     UtRegisterTest("SigParseTest04", SigParseTest04, 1);
+    UtRegisterTest("SigParseTest05", SigParseTest05, 1);
     UtRegisterTest("SigParseTestNegation01", SigParseTestNegation01, 1);
     UtRegisterTest("SigParseTestNegation02", SigParseTestNegation02, 1);
     UtRegisterTest("SigParseTestNegation03", SigParseTestNegation03, 1);