diff -u a/openssh-8_5_P1-hpn-DynWinNoneSwitch-15.2.diff b/openssh-8_5_P1-hpn-DynWinNoneSwitch-15.2.diff
--- a/openssh-8_5_P1-hpn-DynWinNoneSwitch-15.2.diff	2021-03-15 15:10:45.680967455 -0700
+++ b/openssh-8_5_P1-hpn-DynWinNoneSwitch-15.2.diff	2021-03-16 10:25:14.710431930 -0700
@@ -536,18 +536,10 @@
  	if (state->rekey_limit)
  		*max_blocks = MINIMUM(*max_blocks,
  		    state->rekey_limit / enc->block_size);
-@@ -954,6 +963,24 @@ ssh_set_newkeys(struct ssh *ssh, int mode)
+@@ -954,6 +963,16 @@ ssh_set_newkeys(struct ssh *ssh, int mode)
  	return 0;
  }
  
-+/* this supports the forced rekeying required for the NONE cipher */
-+int rekey_requested = 0;
-+void
-+packet_request_rekeying(void)
-+{
-+	rekey_requested = 1;
-+}
-+
 +/* used to determine if pre or post auth when rekeying for aes-ctr
 + * and none cipher switch */
 +int
@@ -561,20 +553,6 @@
  #define MAX_PACKETS	(1U<<31)
  static int
  ssh_packet_need_rekeying(struct ssh *ssh, u_int outbound_packet_len)
-@@ -980,6 +1007,13 @@ ssh_packet_need_rekeying(struct ssh *ssh, u_int outbound_packet_len)
- 	if (state->p_send.packets == 0 && state->p_read.packets == 0)
- 		return 0;
- 
-+	/* used to force rekeying when called for by the none
-+         * cipher switch methods -cjr */
-+        if (rekey_requested == 1) {
-+                rekey_requested = 0;
-+                return 1;
-+        }
-+
- 	/* Time-based rekeying */
- 	if (state->rekey_interval != 0 &&
- 	    (int64_t)state->rekey_time + state->rekey_interval <= monotime())
 @@ -1317,7 +1351,7 @@ ssh_packet_read_seqnr(struct ssh *ssh, u_char *typep, u_int32_t *seqnr_p)
  	struct session_state *state = ssh->state;
  	int len, r, ms_remain;
@@ -598,12 +576,11 @@
  };
  
  typedef int (ssh_packet_hook_fn)(struct ssh *, struct sshbuf *,
-@@ -155,6 +158,10 @@ int	 ssh_packet_inc_alive_timeouts(struct ssh *);
+@@ -155,6 +158,9 @@ int	 ssh_packet_inc_alive_timeouts(struct ssh *);
  int	 ssh_packet_set_maxsize(struct ssh *, u_int);
  u_int	 ssh_packet_get_maxsize(struct ssh *);
  
 +/* for forced packet rekeying post auth */
-+void	 packet_request_rekeying(void);
 +int	 packet_authentication_state(const struct ssh *);
 +
  int	 ssh_packet_get_state(struct ssh *, struct sshbuf *);
@@ -627,9 +604,9 @@
  	oLocalCommand, oPermitLocalCommand, oRemoteCommand,
 +	oTcpRcvBufPoll, oTcpRcvBuf, oHPNDisabled, oHPNBufferSize,
 +	oNoneEnabled, oNoneMacEnabled, oNoneSwitch,
+ 	oDisableMTAES,
  	oVisualHostKey,
  	oKexAlgorithms, oIPQoS, oRequestTTY, oIgnoreUnknown, oProxyUseFdpass,
- 	oCanonicalDomains, oCanonicalizeHostname, oCanonicalizeMaxDots,
 @@ -297,6 +300,9 @@ static struct {
  	{ "kexalgorithms", oKexAlgorithms },
  	{ "ipqos", oIPQoS },
@@ -778,9 +755,9 @@
  	int	ip_qos_bulk;		/* IP ToS/DSCP/class for bulk traffic */
  	SyslogFacility log_facility;	/* Facility for system logging. */
 @@ -120,7 +124,11 @@ typedef struct {
- 
  	int	enable_ssh_keysign;
  	int64_t rekey_limit;
+ 	int     disable_multithreaded; /*disable multithreaded aes-ctr*/
 +	int     none_switch;    /* Use none cipher */
 +	int     none_enabled;   /* Allow none cipher to be used */
 +  	int     nonemac_enabled;   /* Allow none MAC to be used */
@@ -842,9 +819,9 @@
  	/* Portable-specific options */
  	if (options->use_pam == -1)
 @@ -424,6 +434,49 @@ fill_default_server_options(ServerOptions *options)
- 	}
- 	if (options->permit_tun == -1)
  		options->permit_tun = SSH_TUNMODE_NO;
+ 	if (options->disable_multithreaded == -1)
+ 		options->disable_multithreaded = 0;
 +	if (options->none_enabled == -1)
 +		options->none_enabled = 0;
 +	if (options->nonemac_enabled == -1)
@@ -1330,9 +1307,9 @@
 +		}
 +	}
 +
- 	debug("Authentication succeeded (%s).", authctxt.method->name);
- }
  
+ #ifdef WITH_OPENSSL
+ 	if (options.disable_multithreaded == 0) {
 diff --git a/sshd.c b/sshd.c
 index 6277e6d6..d66fa41a 100644
 --- a/sshd.c