--- a/ssl/d1_clnt.c
+++ b/ssl/d1_clnt.c
@@ -130,7 +130,7 @@ static int dtls1_get_hello_verify(SSL *s
 
 static SSL_METHOD *dtls1_get_client_method(int ver)
 	{
-	if (ver == DTLS1_VERSION)
+	if (ver == DTLS1_VERSION || ver == DTLS1_BAD_VER)
 		return(DTLSv1_client_method());
 	else
 		return(NULL);
@@ -181,7 +181,8 @@ int dtls1_connect(SSL *s)
 			s->server=0;
 			if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
 
-			if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00))
+			if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00) &&
+			    (s->version & 0xff00 ) != (DTLS1_BAD_VER & 0xff00))
 				{
 				SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR);
 				ret = -1;
--- a/ssl/d1_lib.c
+++ b/ssl/d1_lib.c
@@ -187,7 +187,10 @@ void dtls1_free(SSL *s)
 void dtls1_clear(SSL *s)
 	{
 	ssl3_clear(s);
-	s->version=DTLS1_VERSION;
+	if (s->options & SSL_OP_CISCO_ANYCONNECT)
+		s->version=DTLS1_BAD_VER;
+	else
+		s->version=DTLS1_VERSION;
 	}
 
 /*
--- a/ssl/d1_pkt.c
+++ b/ssl/d1_pkt.c
@@ -987,15 +987,17 @@ start:
 	if (rr->type == SSL3_RT_CHANGE_CIPHER_SPEC)
 		{
 		struct ccs_header_st ccs_hdr;
+		int ccs_hdr_len = DTLS1_CCS_HEADER_LENGTH;
 
 		dtls1_get_ccs_header(rr->data, &ccs_hdr);
 
 		/* 'Change Cipher Spec' is just a single byte, so we know
 		 * exactly what the record payload has to look like */
 		/* XDTLS: check that epoch is consistent */
-		if (	(s->client_version == DTLS1_BAD_VER && rr->length != 3) ||
-			(s->client_version != DTLS1_BAD_VER && rr->length != DTLS1_CCS_HEADER_LENGTH) || 
-			(rr->off != 0) || (rr->data[0] != SSL3_MT_CCS))
+		if (s->client_version == DTLS1_BAD_VER || s->version == DTLS1_BAD_VER)
+			ccs_hdr_len = 3;
+
+		if ((rr->length != ccs_hdr_len) || (rr->off != 0) || (rr->data[0] != SSL3_MT_CCS))
 			{
 			i=SSL_AD_ILLEGAL_PARAMETER;
 			SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_BAD_CHANGE_CIPHER_SPEC);
@@ -1311,7 +1313,7 @@ int do_dtls1_write(SSL *s, int type, con
 #if 0
 	/* 'create_empty_fragment' is true only when this function calls itself */
 	if (!clear && !create_empty_fragment && !s->s3->empty_fragment_done
-		&& SSL_version(s) != DTLS1_VERSION)
+	    && SSL_version(s) != DTLS1_VERSION && SSL_version(s) != DTLS1_BAD_VER)
 		{
 		/* countermeasure against known-IV weakness in CBC ciphersuites
 		 * (see http://www.openssl.org/~bodo/tls-cbc.txt) 
--- a/ssl/s3_clnt.c
+++ b/ssl/s3_clnt.c
@@ -708,7 +708,7 @@ int ssl3_get_server_hello(SSL *s)
 
 	if (!ok) return((int)n);
 
-	if ( SSL_version(s) == DTLS1_VERSION)
+	if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
 		{
 		if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
 			{
--- a/ssl/ssl.h
+++ b/ssl/ssl.h
@@ -510,6 +510,8 @@ typedef struct ssl_session_st
 #define SSL_OP_COOKIE_EXCHANGE              0x00002000L
 /* Don't use RFC4507 ticket extension */
 #define SSL_OP_NO_TICKET	            0x00004000L
+/* Use Cisco's "speshul" version of DTLS_BAD_VER (as client)  */
+#define SSL_OP_CISCO_ANYCONNECT		    0x00008000L
 
 /* As server, disallow session resumption on renegotiation */
 #define SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION	0x00010000L
--- a/ssl/ssl_lib.c
+++ b/ssl/ssl_lib.c
@@ -995,7 +995,8 @@ long SSL_ctrl(SSL *s,int cmd,long larg,v
 		s->max_cert_list=larg;
 		return(l);
 	case SSL_CTRL_SET_MTU:
-		if (SSL_version(s) == DTLS1_VERSION)
+		if (SSL_version(s) == DTLS1_VERSION ||
+		    SSL_version(s) == DTLS1_BAD_VER)
 			{
 			s->d1->mtu = larg;
 			return larg;
--- a/ssl/ssl_sess.c
+++ b/ssl/ssl_sess.c
@@ -211,6 +211,11 @@ int ssl_get_new_session(SSL *s, int sess
 			ss->ssl_version=TLS1_VERSION;
 			ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
 			}
+		else if (s->version == DTLS1_BAD_VER)
+			{
+			ss->ssl_version=DTLS1_BAD_VER;
+			ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
+			}
 		else if (s->version == DTLS1_VERSION)
 			{
 			ss->ssl_version=DTLS1_VERSION;
--- a/ssl/t1_enc.c
+++ b/ssl/t1_enc.c
@@ -765,10 +765,10 @@ int tls1_mac(SSL *ssl, unsigned char *md
 	HMAC_CTX_init(&hmac);
 	HMAC_Init_ex(&hmac,mac_sec,EVP_MD_size(hash),hash,NULL);
 
-	if (ssl->version == DTLS1_VERSION && ssl->client_version != DTLS1_BAD_VER)
+	if (ssl->version == DTLS1_BAD_VER ||
+	    (ssl->version == DTLS1_VERSION && ssl->client_version != DTLS1_BAD_VER))
 		{
 		unsigned char dtlsseq[8],*p=dtlsseq;
-
 		s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
 		memcpy (p,&seq[2],6);
 
@@ -793,7 +793,7 @@ printf("rec=");
 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
 #endif
 
-	if ( SSL_version(ssl) != DTLS1_VERSION)
+	if ( SSL_version(ssl) != DTLS1_VERSION && SSL_version(ssl) != DTLS1_BAD_VER)
 		{
 		for (i=7; i>=0; i--)
 			{
