diff --git a/src/internal.c b/src/internal.c
index 93b9e0882..3e7a7410c 100755
--- a/src/internal.c
+++ b/src/internal.c
@@ -9684,10 +9684,12 @@ static INLINE int DtlsCheckWindow(WOLFSSL* ssl)
         WOLFSSL_MSG("Current record sequence number from the past.");
         return 0;
     }
+#ifndef WOLFSSL_DTLS_ALLOW_FUTURE
     else if (!curLT && (diff > DTLS_SEQ_BITS)) {
         WOLFSSL_MSG("Rejecting message too far into the future.");
         return 0;
     }
+#endif
     else if (curLT) {
         word32 idx = diff / DTLS_WORD_BITS;
         word32 newDiff = diff % DTLS_WORD_BITS;
diff --git a/wolfssl/internal.h b/wolfssl/internal.h
index d1911b259..7bac49e00 100755
--- a/wolfssl/internal.h
+++ b/wolfssl/internal.h
@@ -924,6 +924,10 @@ enum {
     #define WOLFSSL_DTLS_PEERSEQ_SZ WOLFSSL_MULTICAST_PEERS
 #endif /* WOLFSSL_MULTICAST */
 
+#ifndef WOLFSSL_MAX_MTU
+    #define WOLFSSL_MAX_MTU 1500
+#endif /* WOLFSSL_MAX_MTU */
+
 
 
 enum Misc {
@@ -970,7 +974,7 @@ enum Misc {
                                 /* RECORD_HEADER_SZ + BLOCK_SZ (pad) + Max
                                    digest sz + BLOC_SZ (iv) + pad byte (1) */
     MAX_COMP_EXTRA  = 1024,     /* max compression extra */
-    MAX_MTU         = 1500,     /* max expected MTU */
+    MAX_MTU         = WOLFSSL_MAX_MTU,     /* max expected MTU */
     MAX_UDP_SIZE    = 8192 - 100, /* was MAX_MTU - 100 */
     MAX_DH_SZ       = 1036,     /* 4096 p, pub, g + 2 byte size for each */
     MAX_STR_VERSION = 8,        /* string rep of protocol version */