diff --git a/src/Cedar/AzureClient.c b/src/Cedar/AzureClient.c
index 447c6abd..78d5e01b 100644
--- a/src/Cedar/AzureClient.c
+++ b/src/Cedar/AzureClient.c
@@ -193,7 +193,7 @@ void AcWaitForRequest(AZURE_CLIENT *ac, SOCK *s, AZURE_PARAM *param)
 
 								SetTimeout(ns, param->DataTimeout);
 
-								if (StartSSLEx(ns, NULL, NULL, true, 0, NULL))
+								if (StartSSLEx(ns, NULL, NULL, 0, NULL))
 								{
 									// Check certification
 									char server_cert_hash_str[MAX_SIZE];
diff --git a/src/Cedar/CM.c b/src/Cedar/CM.c
index ea0f6cfd..36eceaa3 100644
--- a/src/Cedar/CM.c
+++ b/src/Cedar/CM.c
@@ -6373,7 +6373,6 @@ void CmImportAccountMainEx(HWND hWnd, wchar_t *filename, bool overwrite)
 					t->ClientOption->RequireMonitorMode = old_option->RequireMonitorMode;
 					t->ClientOption->RequireBridgeRoutingMode = old_option->RequireBridgeRoutingMode;
 					t->ClientOption->DisableQoS = old_option->DisableQoS;
-					t->ClientOption->NoTls1 = old_option->NoTls1;
 
 					// Inherit the authentication data
 					CiFreeClientAuth(t->ClientAuth);
@@ -6987,8 +6986,6 @@ void CmEditAccountDlgUpdate(HWND hWnd, CM_ACCOUNT *a)
 	}
 	a->ClientOption->RetryInterval = GetInt(hWnd, E_RETRY_SPAN);
 
-	a->ClientOption->NoTls1 = IsChecked(hWnd, R_NOTLS1);
-
 	// Information determining
 	if (UniStrLen(a->ClientOption->AccountName) == 0 && a->NatMode == false)
 	{
@@ -7442,8 +7439,6 @@ void CmEditAccountDlgInit(HWND hWnd, CM_ACCOUNT *a)
 	}
 	SetIntEx(hWnd, E_RETRY_SPAN, a->ClientOption->RetryInterval);
 
-	Check(hWnd, R_NOTLS1, a->ClientOption->NoTls1);
-
 	// Title
 	if (a->NatMode == false)
 	{
diff --git a/src/Cedar/Client.c b/src/Cedar/Client.c
index bc8d1d57..70296d1b 100644
--- a/src/Cedar/Client.c
+++ b/src/Cedar/Client.c
@@ -4548,7 +4548,6 @@ void InRpcClientOption(CLIENT_OPTION *c, PACK *p)
 	c->RequireMonitorMode = PackGetBool(p, "RequireMonitorMode");
 	c->RequireBridgeRoutingMode = PackGetBool(p, "RequireBridgeRoutingMode");
 	c->FromAdminPack = PackGetBool(p, "FromAdminPack");
-	c->NoTls1 = PackGetBool(p, "NoTls1");
 	c->NoUdpAcceleration = PackGetBool(p, "NoUdpAcceleration");
 	PackGetData2(p, "HostUniqueKey", c->HostUniqueKey, SHA1_SIZE);
 }
@@ -4586,7 +4585,6 @@ void OutRpcClientOption(PACK *p, CLIENT_OPTION *c)
 	PackAddBool(p, "RequireBridgeRoutingMode", c->RequireBridgeRoutingMode);
 	PackAddBool(p, "DisableQoS", c->DisableQoS);
 	PackAddBool(p, "FromAdminPack", c->FromAdminPack);
-	PackAddBool(p, "NoTls1", c->NoTls1);
 	PackAddBool(p, "NoUdpAcceleration", c->NoUdpAcceleration);
 	PackAddData(p, "HostUniqueKey", c->HostUniqueKey, SHA1_SIZE);
 }
@@ -9580,7 +9578,6 @@ CLIENT_OPTION *CiLoadClientOption(FOLDER *f)
 	o->RequireBridgeRoutingMode = CfgGetBool(f, "RequireBridgeRoutingMode");
 	o->DisableQoS = CfgGetBool(f, "DisableQoS");
 	o->FromAdminPack = CfgGetBool(f, "FromAdminPack");
-	o->NoTls1 = CfgGetBool(f, "NoTls1");
 	o->NoUdpAcceleration = CfgGetBool(f, "NoUdpAcceleration");
 	
 	b = CfgGetBuf(f, "HostUniqueKey");
@@ -10114,7 +10111,6 @@ void CiWriteClientOption(FOLDER *f, CLIENT_OPTION *o)
 	CfgAddBool(f, "RequireMonitorMode", o->RequireMonitorMode);
 	CfgAddBool(f, "RequireBridgeRoutingMode", o->RequireBridgeRoutingMode);
 	CfgAddBool(f, "DisableQoS", o->DisableQoS);
-	CfgAddBool(f, "NoTls1", o->NoTls1);
 	CfgAddBool(f, "NoUdpAcceleration", o->NoUdpAcceleration);
 
 	if (o->FromAdminPack)
diff --git a/src/Cedar/Command.c b/src/Cedar/Command.c
index 7f380b33..4c2222d0 100644
--- a/src/Cedar/Command.c
+++ b/src/Cedar/Command.c
@@ -2190,7 +2190,7 @@ void TtcThread(THREAD *thread, void *param)
 			IPToStr(target_host, sizeof(target_host), &ip_ret);
 		}
 
-		s = ConnectEx4(target_host, ttc->Port, 0, ttc->Cancel, NULL, NULL, false, false, true, &ip_ret);
+		s = ConnectEx4(target_host, ttc->Port, 0, ttc->Cancel, NULL, NULL, false, true, &ip_ret);
 
 		if (s == NULL)
 		{
diff --git a/src/Cedar/Connection.c b/src/Cedar/Connection.c
index af2bd27b..594eb0fe 100644
--- a/src/Cedar/Connection.c
+++ b/src/Cedar/Connection.c
@@ -3659,9 +3659,6 @@ CONNECTION *NewClientConnectionEx(SESSION *s, char *client_str, UINT client_ver,
 	StrCpy(c->ServerName, sizeof(c->ServerName), s->ClientOption->Hostname);
 	c->ServerPort = s->ClientOption->Port;
 
-	// TLS 1.0 using flag
-	c->DontUseTls1 = s->ClientOption->NoTls1;
-
 	// Create queues
 	c->ReceivedBlocks = NewQueue();
 	c->SendBlocks = NewQueue();
diff --git a/src/Cedar/Connection.h b/src/Cedar/Connection.h
index eab8eada..1c95e088 100644
--- a/src/Cedar/Connection.h
+++ b/src/Cedar/Connection.h
@@ -189,7 +189,6 @@ struct CLIENT_OPTION
 	bool RequireBridgeRoutingMode;					// Bridge or routing mode
 	bool DisableQoS;								// Disable the VoIP / QoS function
 	bool FromAdminPack;								// For Administration Pack
-	bool NoTls1;									// Do not use TLS 1.0
 	bool NoUdpAcceleration;							// Do not use UDP acceleration mode
 	UCHAR HostUniqueKey[SHA1_SIZE];					// Host unique key
 };
@@ -310,7 +309,6 @@ struct CONNECTION
 	IP ClientIp;					// Client IP address
 	char ClientHostname[MAX_HOST_NAME_LEN + 1];	// Client host name
 	UINT Type;						// Type
-	bool DontUseTls1;				// Do not use TLS 1.0
 	void *hWndForUI;				// Parent window
 	bool IsInProc;					// In-process
 	char InProcPrefix[64];			// Prefix
diff --git a/src/Cedar/Protocol.c b/src/Cedar/Protocol.c
index 0a641f71..ddeedcf0 100644
--- a/src/Cedar/Protocol.c
+++ b/src/Cedar/Protocol.c
@@ -3995,7 +3995,7 @@ SOCK *ClientAdditionalConnectToServer(CONNECTION *c)
 	}
 
 	// Socket connection
-	s = ClientConnectGetSocket(c, true, (c->DontUseTls1 ? false : true));
+	s = ClientConnectGetSocket(c, true);
 	if (s == NULL)
 	{
 		// Connection failure
@@ -4030,7 +4030,7 @@ SOCK *ClientAdditionalConnectToServer(CONNECTION *c)
 	SetTimeout(s, CONNECTING_TIMEOUT);
 
 	// Start the SSL communication
-	if (StartSSLEx(s, NULL, NULL, (c->DontUseTls1 ? false : true), 0, c->ServerName) == false)
+	if (StartSSLEx(s, NULL, NULL, 0, c->ServerName) == false)
 	{
 		// SSL communication failure
 		Disconnect(s);
@@ -6445,7 +6445,7 @@ SOCK *ClientConnectToServer(CONNECTION *c)
 	}
 
 	// Get the socket by connecting
-	s = ClientConnectGetSocket(c, false, (c->DontUseTls1 ? false : true));
+	s = ClientConnectGetSocket(c, false);
 	if (s == NULL)
 	{
 		// Connection failure
@@ -6466,7 +6466,7 @@ SOCK *ClientConnectToServer(CONNECTION *c)
 	SetTimeout(s, CONNECTING_TIMEOUT);
 
 	// Start the SSL communication
-	if (StartSSLEx(s, x, k, (c->DontUseTls1 ? false : true), 0, c->ServerName) == false)
+	if (StartSSLEx(s, x, k, 0, c->ServerName) == false)
 	{
 		// SSL communication start failure
 		Disconnect(s);
@@ -6490,7 +6490,7 @@ SOCK *ClientConnectToServer(CONNECTION *c)
 }
 
 // Return a socket by connecting to the server
-SOCK *ClientConnectGetSocket(CONNECTION *c, bool additional_connect, bool no_tls)
+SOCK *ClientConnectGetSocket(CONNECTION *c, bool additional_connect)
 {
 	SOCK *s = NULL;
 	CLIENT_OPTION *o;
@@ -6562,7 +6562,7 @@ SOCK *ClientConnectGetSocket(CONNECTION *c, bool additional_connect, bool no_tls
 				// If additional_connect == true, follow the IsRUDPSession setting in this session
 				s = TcpIpConnectEx(host_for_direct_connection, port_for_direct_connection,
 					(bool *)cancel_flag, hWnd, &nat_t_err, (additional_connect ? (!is_additional_rudp_session) : false),
-					true, no_tls, &ret_ip);
+					true, &ret_ip);
 			}
 		}
 		else
@@ -6723,7 +6723,7 @@ SOCK *SocksConnectEx2(CONNECTION *c, char *proxy_host_name, UINT proxy_port,
 	}
 
 	// Connection
-	s = TcpConnectEx3(proxy_host_name, proxy_port, timeout, cancel_flag, hWnd, true, NULL, false, false, ret_ip);
+	s = TcpConnectEx3(proxy_host_name, proxy_port, timeout, cancel_flag, hWnd, true, NULL, false, ret_ip);
 	if (s == NULL)
 	{
 		// Failure
@@ -6930,7 +6930,7 @@ SOCK *ProxyConnectEx2(CONNECTION *c, char *proxy_host_name, UINT proxy_port,
 	}
 
 	// Connection
-	s = TcpConnectEx3(proxy_host_name, proxy_port, timeout, cancel_flag, hWnd, true, NULL, false, false, NULL);
+	s = TcpConnectEx3(proxy_host_name, proxy_port, timeout, cancel_flag, hWnd, true, NULL, false, NULL);
 	if (s == NULL)
 	{
 		// Failure
@@ -7080,32 +7080,32 @@ SOCK *ProxyConnectEx2(CONNECTION *c, char *proxy_host_name, UINT proxy_port,
 }
 
 // TCP connection function
-SOCK *TcpConnectEx2(char *hostname, UINT port, UINT timeout, bool *cancel_flag, void *hWnd, bool try_start_ssl, bool ssl_no_tls)
+SOCK *TcpConnectEx2(char *hostname, UINT port, UINT timeout, bool *cancel_flag, void *hWnd, bool try_start_ssl)
 {
-	return TcpConnectEx3(hostname, port, timeout, cancel_flag, hWnd, false, NULL, try_start_ssl, ssl_no_tls, NULL);
+	return TcpConnectEx3(hostname, port, timeout, cancel_flag, hWnd, false, NULL, try_start_ssl, NULL);
 }
-SOCK *TcpConnectEx3(char *hostname, UINT port, UINT timeout, bool *cancel_flag, void *hWnd, bool no_nat_t, UINT *nat_t_error_code, bool try_start_ssl, bool ssl_no_tls, IP *ret_ip)
+SOCK *TcpConnectEx3(char *hostname, UINT port, UINT timeout, bool *cancel_flag, void *hWnd, bool no_nat_t, UINT *nat_t_error_code, bool try_start_ssl, IP *ret_ip)
 {
 #ifdef	OS_WIN32
 	if (hWnd == NULL)
 	{
 #endif	// OS_WIN32
-		return ConnectEx4(hostname, port, timeout, cancel_flag, (no_nat_t ? NULL : VPN_RUDP_SVC_NAME), nat_t_error_code, try_start_ssl, ssl_no_tls, true, ret_ip);
+		return ConnectEx4(hostname, port, timeout, cancel_flag, (no_nat_t ? NULL : VPN_RUDP_SVC_NAME), nat_t_error_code, try_start_ssl, true, ret_ip);
 #ifdef	OS_WIN32
 	}
 	else
 	{
-		return WinConnectEx3((HWND)hWnd, hostname, port, timeout, 0, NULL, NULL, nat_t_error_code, (no_nat_t ? NULL : VPN_RUDP_SVC_NAME), try_start_ssl, ssl_no_tls);
+		return WinConnectEx3((HWND)hWnd, hostname, port, timeout, 0, NULL, NULL, nat_t_error_code, (no_nat_t ? NULL : VPN_RUDP_SVC_NAME), try_start_ssl);
 	}
 #endif	// OS_WIN32
 }
 
 // Connect with TCP/IP
-SOCK *TcpIpConnect(char *hostname, UINT port, bool try_start_ssl, bool ssl_no_tls)
+SOCK *TcpIpConnect(char *hostname, UINT port, bool try_start_ssl)
 {
-	return TcpIpConnectEx(hostname, port, NULL, NULL, NULL, false, try_start_ssl, ssl_no_tls, NULL);
+	return TcpIpConnectEx(hostname, port, NULL, NULL, NULL, false, try_start_ssl, NULL);
 }
-SOCK *TcpIpConnectEx(char *hostname, UINT port, bool *cancel_flag, void *hWnd, UINT *nat_t_error_code, bool no_nat_t, bool try_start_ssl, bool ssl_no_tls, IP *ret_ip)
+SOCK *TcpIpConnectEx(char *hostname, UINT port, bool *cancel_flag, void *hWnd, UINT *nat_t_error_code, bool no_nat_t, bool try_start_ssl, IP *ret_ip)
 {
 	SOCK *s = NULL;
 	UINT dummy_int = 0;
@@ -7120,7 +7120,7 @@ SOCK *TcpIpConnectEx(char *hostname, UINT port, bool *cancel_flag, void *hWnd, U
 		return NULL;
 	}
 
-	s = TcpConnectEx3(hostname, port, 0, cancel_flag, hWnd, no_nat_t, nat_t_error_code, try_start_ssl, ssl_no_tls, ret_ip);
+	s = TcpConnectEx3(hostname, port, 0, cancel_flag, hWnd, no_nat_t, nat_t_error_code, try_start_ssl, ret_ip);
 	if (s == NULL)
 	{
 		return NULL;
diff --git a/src/Cedar/Protocol.h b/src/Cedar/Protocol.h
index db7460c1..fe37d2d8 100644
--- a/src/Cedar/Protocol.h
+++ b/src/Cedar/Protocol.h
@@ -217,16 +217,16 @@ UINT64 ShortStrToDate64(char *str);
 bool ServerAccept(CONNECTION *c);
 bool ClientConnect(CONNECTION *c);
 SOCK *ClientConnectToServer(CONNECTION *c);
-SOCK *TcpIpConnect(char *hostname, UINT port, bool try_start_ssl, bool ssl_no_tls);
-SOCK *TcpIpConnectEx(char *hostname, UINT port, bool *cancel_flag, void *hWnd, UINT *nat_t_error_code, bool no_nat_t, bool try_start_ssl, bool ssl_no_tls, IP *ret_ip);
+SOCK *TcpIpConnect(char *hostname, UINT port, bool try_start_ssl);
+SOCK *TcpIpConnectEx(char *hostname, UINT port, bool *cancel_flag, void *hWnd, UINT *nat_t_error_code, bool no_nat_t, bool try_start_ssl, IP *ret_ip);
 bool ClientUploadSignature(SOCK *s);
 bool ClientDownloadHello(CONNECTION *c, SOCK *s);
 bool ServerDownloadSignature(CONNECTION *c, char **error_detail_str);
 bool ServerUploadHello(CONNECTION *c);
 bool ClientUploadAuth(CONNECTION *c);
-SOCK *ClientConnectGetSocket(CONNECTION *c, bool additional_connect, bool no_tls);
-SOCK *TcpConnectEx2(char *hostname, UINT port, UINT timeout, bool *cancel_flag, void *hWnd, bool try_start_ssl, bool ssl_no_tls);
-SOCK *TcpConnectEx3(char *hostname, UINT port, UINT timeout, bool *cancel_flag, void *hWnd, bool no_nat_t, UINT *nat_t_error_code, bool try_start_ssl, bool ssl_no_tls, IP *ret_ip);
+SOCK *ClientConnectGetSocket(CONNECTION *c, bool additional_connect);
+SOCK *TcpConnectEx2(char *hostname, UINT port, UINT timeout, bool *cancel_flag, void *hWnd, bool try_start_ssl);
+SOCK *TcpConnectEx3(char *hostname, UINT port, UINT timeout, bool *cancel_flag, void *hWnd, bool no_nat_t, UINT *nat_t_error_code, bool try_start_ssl, IP *ret_ip);
 
 void InitProtocol();
 void FreeProtocol();
diff --git a/src/Cedar/Server.c b/src/Cedar/Server.c
index 5ec4ecba..e9f8904f 100644
--- a/src/Cedar/Server.c
+++ b/src/Cedar/Server.c
@@ -2550,9 +2550,6 @@ void SiLoadInitialConfiguration(SERVER *s)
 		return;
 	}
 
-	// Default to TLS only; mitigates CVE-2016-0800
-	s->Cedar->SslAcceptSettings.AcceptOnlyTls = true;
-
 	// Auto saving interval related
 	s->AutoSaveConfigSpan = SERVER_FILE_SAVE_INTERVAL_DEFAULT;
 	s->BackupConfigOnlyWhenModified = true;
@@ -6132,16 +6129,6 @@ void SiLoadServerCfg(SERVER *s, FOLDER *f)
 		// Disable session reconnect
 		SetGlobalServerFlag(GSF_DISABLE_SESSION_RECONNECT, CfgGetBool(f, "DisableSessionReconnect"));
 
-		// AcceptOnlyTls
-		if (CfgIsItem(f, "AcceptOnlyTls"))
-		{
-			c->SslAcceptSettings.AcceptOnlyTls = CfgGetBool(f, "AcceptOnlyTls");
-		}
-		else
-		{
-			// Default to TLS only; mitigates CVE-2016-0800
-			c->SslAcceptSettings.AcceptOnlyTls = true;
-		}
 		c->SslAcceptSettings.Tls_Disable1_0 = CfgGetBool(f, "Tls_Disable1_0");
 		c->SslAcceptSettings.Tls_Disable1_1 = CfgGetBool(f, "Tls_Disable1_1");
 		c->SslAcceptSettings.Tls_Disable1_2 = CfgGetBool(f, "Tls_Disable1_2");
@@ -6466,7 +6453,6 @@ void SiWriteServerCfg(FOLDER *f, SERVER *s)
 		CfgAddBool(f, "DisableGetHostNameWhenAcceptTcp", s->DisableGetHostNameWhenAcceptTcp);
 		CfgAddBool(f, "DisableCoreDumpOnUnix", s->DisableCoreDumpOnUnix);
 
-		CfgAddBool(f, "AcceptOnlyTls", c->SslAcceptSettings.AcceptOnlyTls);
 		CfgAddBool(f, "Tls_Disable1_0", c->SslAcceptSettings.Tls_Disable1_0);
 		CfgAddBool(f, "Tls_Disable1_1", c->SslAcceptSettings.Tls_Disable1_1);
 		CfgAddBool(f, "Tls_Disable1_2", c->SslAcceptSettings.Tls_Disable1_2);
diff --git a/src/Cedar/Virtual.c b/src/Cedar/Virtual.c
index a25376fd..b02325f5 100644
--- a/src/Cedar/Virtual.c
+++ b/src/Cedar/Virtual.c
@@ -4431,7 +4431,7 @@ void NatTcpConnectThread(THREAD *t, void *p)
 
 	// Attempt to connect to the TCP host
 	Debug("NatTcpConnect Connecting to %s:%u\n", hostname, port_number);
-	sock = ConnectEx3(hostname, port_number, 0, &n->NatTcpCancelFlag, NULL, NULL, false, false, true);
+	sock = ConnectEx3(hostname, port_number, 0, &n->NatTcpCancelFlag, NULL, NULL, false, true);
 	if (sock == NULL)
 	{
 		// Connection failure
diff --git a/src/Cedar/WinUi.c b/src/Cedar/WinUi.c
index 67ecf660..364eb54c 100644
--- a/src/Cedar/WinUi.c
+++ b/src/Cedar/WinUi.c
@@ -1460,7 +1460,7 @@ void WinConnectDlgThread(THREAD *thread, void *param)
 		nat_t_svc_name = d->nat_t_svc_name;
 	}
 
-	s = ConnectEx3(d->hostname, d->port, d->timeout, &d->cancel, nat_t_svc_name, &nat_t_error_code, d->try_start_ssl, d->ssl_no_tls, false);
+	s = ConnectEx3(d->hostname, d->port, d->timeout, &d->cancel, nat_t_svc_name, &nat_t_error_code, d->try_start_ssl, false);
 
 	d->ret_sock = s;
 	d->nat_t_error_code = nat_t_error_code;
@@ -1536,7 +1536,7 @@ UINT WinConnectDlgProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam, void *
 }
 
 // TCP connection with showing the UI
-SOCK *WinConnectEx3(HWND hWnd, char *server, UINT port, UINT timeout, UINT icon_id, wchar_t *caption, wchar_t *info, UINT *nat_t_error_code, char *nat_t_svc_name, bool try_start_ssl, bool ssl_no_tls)
+SOCK *WinConnectEx3(HWND hWnd, char *server, UINT port, UINT timeout, UINT icon_id, wchar_t *caption, wchar_t *info, UINT *nat_t_error_code, char *nat_t_svc_name, bool try_start_ssl)
 {
 	wchar_t tmp[MAX_SIZE];
 	wchar_t tmp2[MAX_SIZE];
@@ -1572,7 +1572,6 @@ SOCK *WinConnectEx3(HWND hWnd, char *server, UINT port, UINT timeout, UINT icon_
 	Zero(&d, sizeof(d));
 
 	d.try_start_ssl = try_start_ssl;
-	d.ssl_no_tls = ssl_no_tls;
 	d.cancel = false;
 	d.caption = caption;
 	d.icon_id = icon_id;
diff --git a/src/Cedar/WinUi.h b/src/Cedar/WinUi.h
index 9aaa71f7..b9cb29e0 100644
--- a/src/Cedar/WinUi.h
+++ b/src/Cedar/WinUi.h
@@ -449,7 +449,6 @@ typedef struct WINCONNECT_DLG_DATA
 	char nat_t_svc_name[MAX_SIZE];
 	UINT nat_t_error_code;
 	bool try_start_ssl;
-	bool ssl_no_tls;
 } WINCONNECT_DLG_DATA;
 
 HBITMAP ResizeBitmap(HBITMAP hSrc, UINT src_x, UINT src_y, UINT dst_x, UINT dst_y);
@@ -838,7 +837,7 @@ HFONT GetMeiryoFont();
 HFONT GetMeiryoFontEx(UINT font_size);
 HFONT GetMeiryoFontEx2(UINT font_size, bool bold);
 bool ShowWindowsNetworkConnectionDialog();
-SOCK *WinConnectEx3(HWND hWnd, char *server, UINT port, UINT timeout, UINT icon_id, wchar_t *caption, wchar_t *info, UINT *nat_t_error_code, char *nat_t_svc_name, bool try_start_ssl, bool ssl_no_tls);
+SOCK *WinConnectEx3(HWND hWnd, char *server, UINT port, UINT timeout, UINT icon_id, wchar_t *caption, wchar_t *info, UINT *nat_t_error_code, char *nat_t_svc_name, bool try_start_ssl);
 UINT WinConnectDlgProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam, void *param);
 void WinConnectDlgThread(THREAD *thread, void *param);
 void NicInfo(UI_NICINFO *info);
diff --git a/src/Cedar/Wpc.c b/src/Cedar/Wpc.c
index cddfd383..ec16ee3b 100644
--- a/src/Cedar/Wpc.c
+++ b/src/Cedar/Wpc.c
@@ -623,7 +623,7 @@ SOCK *WpcSockConnectEx(WPC_CONNECT *param, UINT *error_code, UINT timeout, bool
 	switch (param->ProxyType)
 	{
 	case PROXY_DIRECT:
-		sock = TcpConnectEx3(param->HostName, param->Port, timeout, cancel, NULL, true, NULL, false, false, NULL);
+		sock = TcpConnectEx3(param->HostName, param->Port, timeout, cancel, NULL, true, NULL, false, NULL);
 		if (sock == NULL)
 		{
 			err = ERR_CONNECT_FAILED;
@@ -790,7 +790,7 @@ BUF *HttpRequestEx3(URL_DATA *data, INTERNET_SETTING *setting,
 	else
 	{
 		// If the connection is not SSL via HTTP Proxy
-		s = TcpConnectEx3(con.ProxyHostName, con.ProxyPort, timeout_connect, cancel, NULL, true, NULL, false, false, NULL);
+		s = TcpConnectEx3(con.ProxyHostName, con.ProxyPort, timeout_connect, cancel, NULL, true, NULL, false, NULL);
 		if (s == NULL)
 		{
 			*error_code = ERR_PROXY_CONNECT_FAILED;
@@ -805,7 +805,7 @@ BUF *HttpRequestEx3(URL_DATA *data, INTERNET_SETTING *setting,
 	if (data->Secure)
 	{
 		// Start the SSL communication
-		if (StartSSLEx(s, NULL, NULL, true, 0, (IsEmptyStr(data->SniString) ? NULL : data->SniString)) == false)
+		if (StartSSLEx(s, NULL, NULL, 0, (IsEmptyStr(data->SniString) ? NULL : data->SniString)) == false)
 		{
 			// SSL connection failed
 			*error_code = ERR_PROTOCOL_ERROR;
diff --git a/src/Mayaqua/Network.c b/src/Mayaqua/Network.c
index 9b76facb..307554c1 100644
--- a/src/Mayaqua/Network.c
+++ b/src/Mayaqua/Network.c
@@ -831,7 +831,7 @@ bool GetIPViaDnsProxyForJapanFlets(IP *ip_ret, char *hostname, bool ipv6, UINT t
 		Format(connect_hostname2, sizeof(connect_hostname2), "[%s]", connect_hostname);
 	}
 
-	s = ConnectEx3(connect_hostname, BFLETS_DNS_PROXY_PORT, timeout, cancel, NULL, NULL, false, false, false);
+	s = ConnectEx3(connect_hostname, BFLETS_DNS_PROXY_PORT, timeout, cancel, NULL, NULL, false, false);
 
 	if (s == NULL)
 	{
@@ -849,7 +849,7 @@ bool GetIPViaDnsProxyForJapanFlets(IP *ip_ret, char *hostname, bool ipv6, UINT t
 	SetTimeout(s, timeout);
 
 	// Start the SSL
-	if (StartSSLEx(s, NULL, NULL, true, 0, NULL) && (*cancel == false))
+	if (StartSSLEx(s, NULL, NULL, 0, NULL) && (*cancel == false))
 	{
 		UCHAR hash[SHA1_SIZE];
 		BUF *hash2 = StrToBin(BFLETS_DNS_PROXY_CERT_HASH);
@@ -12143,9 +12143,9 @@ bool AddChainSslCert(struct ssl_ctx_st *ctx, X *x)
 // Start a TCP-SSL communication
 bool StartSSL(SOCK *sock, X *x, K *priv)
 {
-	return StartSSLEx(sock, x, priv, true, 0, NULL);
+	return StartSSLEx(sock, x, priv, 0, NULL);
 }
-bool StartSSLEx(SOCK *sock, X *x, K *priv, bool client_tls, UINT ssl_timeout, char *sni_hostname)
+bool StartSSLEx(SOCK *sock, X *x, K *priv, UINT ssl_timeout, char *sni_hostname)
 {
 	X509 *x509;
 	EVP_PKEY *key;
@@ -12205,39 +12205,32 @@ bool StartSSLEx(SOCK *sock, X *x, K *priv, bool client_tls, UINT ssl_timeout, ch
 	{
 		if (sock->ServerMode)
 		{
-			SSL_CTX_set_ssl_version(ssl_ctx, SSLv23_method());
+			SSL_CTX_set_ssl_version(ssl_ctx, SSLv23_server_method());
 
-#ifdef	SSL_OP_NO_SSLv2
-			SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_SSLv2);
-#endif	// SSL_OP_NO_SSLv2
-
-			if (sock->SslAcceptSettings.AcceptOnlyTls)
-			{
 #ifdef	SSL_OP_NO_SSLv3
-				SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_SSLv3);
+			SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_SSLv3);
 #endif	// SSL_OP_NO_SSLv3
-			}
 
+#ifdef	SSL_OP_NO_TLSv1
 			if (sock->SslAcceptSettings.Tls_Disable1_0)
 			{
-#ifdef	SSL_OP_NO_TLSv1
 				SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_TLSv1);
-#endif	// SSL_OP_NO_TLSv1
 			}
+#endif	// SSL_OP_NO_TLSv1
 
+#ifdef	SSL_OP_NO_TLSv1_1
 			if (sock->SslAcceptSettings.Tls_Disable1_1)
 			{
-#ifdef	SSL_OP_NO_TLSv1_1
 				SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_TLSv1_1);
-#endif	// SSL_OP_NO_TLSv1_1
 			}
+#endif	// SSL_OP_NO_TLSv1_1
 
+#ifdef	SSL_OP_NO_TLSv1_2
 			if (sock->SslAcceptSettings.Tls_Disable1_2)
 			{
-#ifdef	SSL_OP_NO_TLSv1_2
 				SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_TLSv1_2);
-#endif	// SSL_OP_NO_TLSv1_2
 			}
+#endif	// SSL_OP_NO_TLSv1_2
 
 			Unlock(openssl_lock);
 			AddChainSslCertOnDirectory(ssl_ctx);
@@ -12245,24 +12238,18 @@ bool StartSSLEx(SOCK *sock, X *x, K *priv, bool client_tls, UINT ssl_timeout, ch
 		}
 		else
 		{
-			if (client_tls == false)
-			{
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
-				SSL_CTX_set_ssl_version(ssl_ctx, SSLv3_method());
-#else
-				SSL_CTX_set_ssl_version(ssl_ctx, SSLv23_method());
-#endif
-			}
-			else
-			{
-				SSL_CTX_set_ssl_version(ssl_ctx, SSLv23_client_method());
-			}
+			SSL_CTX_set_ssl_version(ssl_ctx, SSLv23_client_method());
+
+#ifdef	SSL_OP_NO_SSLv3
+			SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_SSLv3);
+#endif	// SSL_OP_NO_SSLv3
 		}
+
 		sock->ssl = SSL_new(ssl_ctx);
 		SSL_set_fd(sock->ssl, (int)sock->socket);
 
 #ifdef	SSL_CTRL_SET_TLSEXT_HOSTNAME
-		if (sock->ServerMode == false && client_tls)
+		if (sock->ServerMode == false)
 		{
 			if (IsEmptyStr(sni_hostname) == false)
 			{
@@ -14281,7 +14268,7 @@ void ConnectThreadForTcp(THREAD *thread, void *param)
 
 	// Connecting process
 	IPToStr(hostname, sizeof(hostname), &p->Ip);
-	sock = ConnectEx3(hostname, p->Port, p->Timeout, p->CancelFlag, NULL, NULL, false, false, true);
+	sock = ConnectEx3(hostname, p->Port, p->Timeout, p->CancelFlag, NULL, NULL, false, true);
 
 	if (sock != NULL && p->Tcp_TryStartSsl)
 	{
@@ -14306,7 +14293,7 @@ void ConnectThreadForTcp(THREAD *thread, void *param)
 		Unlock(p->CancelLock);
 
 		// Start the SSL communication
-		ssl_ret = StartSSLEx(sock, NULL, NULL, p->Tcp_SslNoTls, 0, p->Hostname);
+		ssl_ret = StartSSLEx(sock, NULL, NULL, 0, p->Hostname);
 
 		if (ssl_ret)
 		{
@@ -14419,14 +14406,13 @@ SOCK *ConnectEx(char *hostname, UINT port, UINT timeout)
 }
 SOCK *ConnectEx2(char *hostname, UINT port, UINT timeout, bool *cancel_flag)
 {
-	return ConnectEx3(hostname, port, timeout, cancel_flag, NULL, NULL, false, false, true);
+	return ConnectEx3(hostname, port, timeout, cancel_flag, NULL, NULL, false, true);
 }
-SOCK *ConnectEx3(char *hostname, UINT port, UINT timeout, bool *cancel_flag, char *nat_t_svc_name, UINT *nat_t_error_code, bool try_start_ssl, bool ssl_no_tls, bool no_get_hostname)
+SOCK *ConnectEx3(char *hostname, UINT port, UINT timeout, bool *cancel_flag, char *nat_t_svc_name, UINT *nat_t_error_code, bool try_start_ssl, bool no_get_hostname)
 {
-	return ConnectEx4(hostname, port, timeout, cancel_flag, nat_t_svc_name, nat_t_error_code, try_start_ssl, ssl_no_tls,
-		no_get_hostname, NULL);
+	return ConnectEx4(hostname, port, timeout, cancel_flag, nat_t_svc_name, nat_t_error_code, try_start_ssl, no_get_hostname, NULL);
 }
-SOCK *ConnectEx4(char *hostname, UINT port, UINT timeout, bool *cancel_flag, char *nat_t_svc_name, UINT *nat_t_error_code, bool try_start_ssl, bool ssl_no_tls, bool no_get_hostname, IP *ret_ip)
+SOCK *ConnectEx4(char *hostname, UINT port, UINT timeout, bool *cancel_flag, char *nat_t_svc_name, UINT *nat_t_error_code, bool try_start_ssl, bool no_get_hostname, IP *ret_ip)
 {
 	SOCK *sock;
 	SOCKET s;
@@ -14605,7 +14591,6 @@ SOCK *ConnectEx4(char *hostname, UINT port, UINT timeout, bool *cancel_flag, cha
 			p1.CancelFlag = &cancel_flag2;
 			p1.FinishEvent = finish_event;
 			p1.Tcp_TryStartSsl = try_start_ssl;
-			p1.Tcp_SslNoTls = ssl_no_tls;
 			p1.CancelLock = NewLock();
 
 			// p2: NAT-T
diff --git a/src/Mayaqua/Network.h b/src/Mayaqua/Network.h
index b3a6cbfd..be9936da 100644
--- a/src/Mayaqua/Network.h
+++ b/src/Mayaqua/Network.h
@@ -250,7 +250,6 @@ struct SOCK_EVENT
 // SSL Accept Settings
 struct SSL_ACCEPT_SETTINGS
 {
-	bool AcceptOnlyTls;
 	bool Tls_Disable1_0;
 	bool Tls_Disable1_1;
 	bool Tls_Disable1_2;
@@ -927,7 +926,6 @@ struct CONNECT_TCP_RUDP_PARAM
 	UINT RUdpProtocol;
 	UINT Delay;
 	bool Tcp_TryStartSsl;
-	bool Tcp_SslNoTls;
 	LOCK *CancelLock;
 	SOCK *CancelDisconnectSock;
 	bool Tcp_InNegotiation;
@@ -1271,8 +1269,8 @@ void CleanupSock(SOCK *s);
 SOCK *Connect(char *hostname, UINT port);
 SOCK *ConnectEx(char *hostname, UINT port, UINT timeout);
 SOCK *ConnectEx2(char *hostname, UINT port, UINT timeout, bool *cancel_flag);
-SOCK *ConnectEx3(char *hostname, UINT port, UINT timeout, bool *cancel_flag, char *nat_t_svc_name, UINT *nat_t_error_code, bool try_start_ssl, bool ssl_no_tls, bool no_get_hostname);
-SOCK *ConnectEx4(char *hostname, UINT port, UINT timeout, bool *cancel_flag, char *nat_t_svc_name, UINT *nat_t_error_code, bool try_start_ssl, bool ssl_no_tls, bool no_get_hostname, IP *ret_ip);
+SOCK *ConnectEx3(char *hostname, UINT port, UINT timeout, bool *cancel_flag, char *nat_t_svc_name, UINT *nat_t_error_code, bool try_start_ssl, bool no_get_hostname);
+SOCK *ConnectEx4(char *hostname, UINT port, UINT timeout, bool *cancel_flag, char *nat_t_svc_name, UINT *nat_t_error_code, bool try_start_ssl, bool no_get_hostname, IP *ret_ip);
 SOCKET ConnectTimeoutIPv4(IP *ip, UINT port, UINT timeout, bool *cancel_flag);
 void SetSocketSendRecvBufferSize(SOCKET s, UINT size);
 bool SetSocketBufferSize(SOCKET s, bool send, UINT size);
@@ -1295,7 +1293,7 @@ void SetNoNeedToRead(SOCK *sock);
 UINT SecureSend(SOCK *sock, void *data, UINT size);
 UINT SecureRecv(SOCK *sock, void *data, UINT size);
 bool StartSSL(SOCK *sock, X *x, K *priv);
-bool StartSSLEx(SOCK *sock, X *x, K *priv, bool client_tls, UINT ssl_timeout, char *sni_hostname);
+bool StartSSLEx(SOCK *sock, X *x, K *priv, UINT ssl_timeout, char *sni_hostname);
 bool AddChainSslCert(struct ssl_ctx_st *ctx, X *x);
 void AddChainSslCertOnDirectory(struct ssl_ctx_st *ctx);
 bool SendAll(SOCK *sock, void *data, UINT size, bool secure);
diff --git a/src/PenCore/PenCore.rc b/src/PenCore/PenCore.rc
index e9959b1f..4d1912f7 100644
--- a/src/PenCore/PenCore.rc
+++ b/src/PenCore/PenCore.rc
@@ -1564,7 +1564,6 @@ BEGIN
     EDITTEXT        E_RETRY_SPAN,318,251,41,11,ES_RIGHT | ES_AUTOHSCROLL | ES_NUMBER
     LTEXT           "@S_RETRY_SPAN_2",S_RETRY_SPAN_2,364,252,72,9
     CONTROL         "@R_INFINITE",R_INFINITE,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,266,265,171,9
-    CONTROL         "@R_NOTLS1",R_NOTLS1,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,253,280,87,9
     PUSHBUTTON      "@B_DETAIL",B_DETAIL,344,277,87,15
     DEFPUSHBUTTON   "@IDOK",IDOK,308,300,64,17
     PUSHBUTTON      "@IDCANCEL",IDCANCEL,380,300,64,17
diff --git a/src/PenCore/resource.h b/src/PenCore/resource.h
index aa6d1eb3..bdb0666b 100644
--- a/src/PenCore/resource.h
+++ b/src/PenCore/resource.h
@@ -360,8 +360,6 @@
 #define B_IE                            1087
 #define B_EXPORT                        1088
 #define IDC_STATIC1                     1088
-#define R_R_NOTLS1                      1088
-#define R_NOTLS1                        1088
 #define R_USE_PASSWORD                  1089
 #define IDC_STATIC3                     1089
 #define B_IMPORT2                       1089
diff --git a/src/bin/hamcore/strtable_cn.stb b/src/bin/hamcore/strtable_cn.stb
index c4336e3c..648e3b99 100644
--- a/src/bin/hamcore/strtable_cn.stb
+++ b/src/bin/hamcore/strtable_cn.stb
@@ -2332,7 +2332,6 @@ S_RETRY_NUM_2				次
 S_RETRY_SPAN_1				重连间隔(&K):
 S_RETRY_SPAN_2				秒
 R_INFINITE					无限重连(总是保持 VPN 在线) (&I)
-R_NOTLS1					使用 SSL 3.0 (&1)
 B_DETAIL					高级设置(&D)...
 IDOK						确定(&O)
 IDCANCEL					取消
diff --git a/src/bin/hamcore/strtable_en.stb b/src/bin/hamcore/strtable_en.stb
index 1a7e3f35..d9a28378 100644
--- a/src/bin/hamcore/strtable_en.stb
+++ b/src/bin/hamcore/strtable_en.stb
@@ -2312,7 +2312,6 @@ S_RETRY_NUM_2			times
 S_RETRY_SPAN_1			Reconnect Interval:
 S_RETRY_SPAN_2			seconds
 R_INFINITE				&Infinite Reconnects (Keep VPN Always Online)
-R_NOTLS1				Use SSL 3.0 (&1)
 B_DETAIL				A&dvanced Settings...
 IDOK					&OK
 IDCANCEL				Cancel
diff --git a/src/bin/hamcore/strtable_ja.stb b/src/bin/hamcore/strtable_ja.stb
index a3487155..913da6ca 100644
--- a/src/bin/hamcore/strtable_ja.stb
+++ b/src/bin/hamcore/strtable_ja.stb
@@ -2317,7 +2317,6 @@ S_RETRY_NUM_2			回
 S_RETRY_SPAN_1			再接続間隔(&K):
 S_RETRY_SPAN_2			秒
 R_INFINITE				無限に再接続を試行する (常時接続) (&I)
-R_NOTLS1				SSL 3.0 を使用する(&1)
 B_DETAIL				高度な通信設定(&N)...
 IDOK					&OK
 IDCANCEL				キャンセル
diff --git a/src/bin/hamcore/strtable_ko.stb b/src/bin/hamcore/strtable_ko.stb
index 4aaaf1df..bd9eea19 100644
--- a/src/bin/hamcore/strtable_ko.stb
+++ b/src/bin/hamcore/strtable_ko.stb
@@ -2312,7 +2312,6 @@ S_RETRY_NUM_2 회
 S_RETRY_SPAN_1 다시 연결 간격 (&K):
 S_RETRY_SPAN_2 초
 R_INFINITE 무한 재 연결을 시도하는 (상시 접속) (&I)
-R_NOTLS1 사용 SSL 3.0(&1)
 B_DETAIL 고급 통신 설정 (&N)...
 IDOK & OK
 IDCANCEL 취소
diff --git a/src/bin/hamcore/strtable_tw.stb b/src/bin/hamcore/strtable_tw.stb
index ab613075..7fd79c71 100644
--- a/src/bin/hamcore/strtable_tw.stb
+++ b/src/bin/hamcore/strtable_tw.stb
@@ -2333,7 +2333,6 @@ S_RETRY_NUM_2			次
 S_RETRY_SPAN_1			重連間隔(&K):
 S_RETRY_SPAN_2			秒
 R_INFINITE				無限重連(總是保持 VPN 線上) (&I)
-R_NOTLS1				使用 SSL 3.0 (&1)
 B_DETAIL				進階設置(&D)...
 IDOK					確定(&O)
 IDCANCEL				取消