diff --git a/flake.nix b/flake.nix
index 828f296..6378faa 100644
--- a/flake.nix
+++ b/flake.nix
@@ -10,9 +10,6 @@
     pname = "softether-5";
     version = "5.02.5187";
   in {
-    packages.${system} = {
-      default = pkgs.callPackage ./package.nix { inherit pname version; };
-      sha0 = pkgs.callPackage ./sha0 {};
-    };
+    packages.${system}.default = pkgs.callPackage ./package.nix { inherit pname version; };
   };
 }
diff --git a/package.nix b/package.nix
index cc65897..5d4bec9 100644
--- a/package.nix
+++ b/package.nix
@@ -3,7 +3,6 @@
   lib,
   stdenv,
   fetchFromGitHub,
-  debug ? false,
   pname ? "softether",
   logDir ? "/var/log/${pname}",
   pidDir ? "/run/${pname}",
@@ -23,8 +22,6 @@ stdenv.mkDerivation (finalAttrs: {
     fetchSubmodules = true;
   };
 
-  patches = [ ./patches/ipb-profile-key.patch ./patches/tap-name-no-prefix.patch ./patches/prevent-dmesg-call.patch ./patches/simplify_l2tp_auth.patch ];
-
   nativeBuildInputs = with pkgs; [
     cmake
     pkg-config
@@ -42,7 +39,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   cmakeFlags = [
     "-DSE_PIDDIR=${pidDir}" "-DSE_LOGDIR=${logDir}" "-DSE_DBDIR=${dbDir}" "-DCMAKE_INSTALL_SYSTEMD_UNITDIR="
-    (lib.optionalString debug "-DCMAKE_BUILD_TYPE=Debug")
+    "-DCMAKE_BUILD_TYPE=Debug"
     "-DCMAKE_INSTALL_PREFIX=${placeholder "out"}"
     "-DCMAKE_INSTALL_LIBDIR=lib"
     "-DCMAKE_INSTALL_INCLUDEDIR=include"
diff --git a/patches/ipb-profile-key.patch b/patches/ipb-profile-key.patch
deleted file mode 100644
index f4e987e..0000000
--- a/patches/ipb-profile-key.patch
+++ /dev/null
@@ -1,112 +0,0 @@
-diff --git a/src/Cedar/Proto_OpenVPN.c b/src/Cedar/Proto_OpenVPN.c
-index 9143d46..9e2d9d8 100644
---- a/src/Cedar/Proto_OpenVPN.c
-+++ b/src/Cedar/Proto_OpenVPN.c
-@@ -823,7 +823,8 @@ void OvsProcessRecvControlPacket(OPENVPN_SERVER *s, OPENVPN_SESSION *se, OPENVPN
- 					s->Dh = DhNewFromBits(s->Cedar->DhParamBits);
- 				}
- 
--				c->SslPipe = NewSslPipeEx(true, s->Cedar->ServerX, s->Cedar->ServerK, s->Dh, true, &c->ClientCert);
-+				// disable automatic cert auth, use profileKey based auth instead
-+				c->SslPipe = NewSslPipeEx(true, s->Cedar->ServerX, s->Cedar->ServerK, s->Dh, false, NULL);
- 				if (c->SslPipe == NULL)
- 				{
- 					return;
-@@ -1477,6 +1478,36 @@ void OvsWriteStringToBuf(BUF *b, char *str, UINT max_size)
- 	Free(tmp);
- }
- 
-+// Extract the value of profile-key as UV_TOKEN from the openvpn peer info
-+char *ExtractProfileKeyAsUvTokenFromPeerInfo(char *peerInfo)
-+{
-+	if (peerInfo == NULL) return NULL;
-+
-+	TOKEN_LIST *tokens = ParseTokenWithoutNullStr(peerInfo, "\r\n");
-+	if (tokens == NULL) return NULL;
-+
-+	char *result = NULL;
-+
-+	for (UINT i = 0; i < tokens->NumTokens; i++)
-+	{
-+		char *line = tokens->Token[i];
-+		Trim(line);
-+		char key[1536], value[1536]; // same length allocated to peerInfo
-+
-+		if (GetKeyAndValue(line, key, sizeof(key), value, sizeof(value), "="))
-+		{
-+			if (StrCmpi(key, "UV_TOKEN") == 0)
-+			{
-+				result = CopyStr(value);
-+				break;
-+			}
-+		}
-+	}
-+
-+	FreeToken(tokens);
-+	return result;
-+}
-+
- // Parse the KEY_METHOD2
- UINT OvsParseKeyMethod2(OPENVPN_KEY_METHOD_2 *ret, UCHAR *data, UINT size, bool client_mode)
- {
-@@ -1527,6 +1558,16 @@ UINT OvsParseKeyMethod2(OPENVPN_KEY_METHOD_2 *ret, UCHAR *data, UINT size, bool
- 		}
- 	}
- 
-+	if(IsEmptyStr(ret->Username))
-+	{
-+		// keep it the same as softether protocol, which also sends entire profilekey as username and a password with any unimportant value
-+		char *ProfileKey = ExtractProfileKeyAsUvTokenFromPeerInfo(ret->PeerInfo);
-+		StrCpy(ret->Username, sizeof(ret->Username), ProfileKey);
-+		ret->Password[0] = '\0'; // empty string
-+
-+		Free(ProfileKey);
-+	}
-+
- 	FreeBuf(b);
- 
- 	return read_size;
-diff --git a/src/Cedar/Proto_OpenVPN.h b/src/Cedar/Proto_OpenVPN.h
-index 0ca10f0..a0ad37b 100644
---- a/src/Cedar/Proto_OpenVPN.h
-+++ b/src/Cedar/Proto_OpenVPN.h
-@@ -255,6 +255,7 @@ void OvsSendControlPacketEx(OPENVPN_CHANNEL *c, UCHAR opcode, UCHAR *data, UINT
- void OvsSendControlPacketWithAutoSplit(OPENVPN_CHANNEL *c, UCHAR opcode, UCHAR *data, UINT data_size);
- void OvsFreeControlPacket(OPENVPN_CONTROL_PACKET *p);
- void OvsDeleteFromSendingControlPacketList(OPENVPN_CHANNEL *c, UINT num_acks, UINT *acks);
-+char *ExtractProfileKeyAsUvTokenFromPeerInfo(char *str);
- UINT OvsParseKeyMethod2(OPENVPN_KEY_METHOD_2 *ret, UCHAR *data, UINT size, bool client_mode);
- bool OvsReadStringFromBuf(BUF *b, char *str, UINT str_size);
- void OvsSetupSessionParameters(OPENVPN_SERVER *s, OPENVPN_SESSION *se, OPENVPN_CHANNEL *c, OPENVPN_KEY_METHOD_2 *data);
-diff --git a/src/Cedar/Protocol.c b/src/Cedar/Protocol.c
-index a0da6c7..d0c9838 100644
---- a/src/Cedar/Protocol.c
-+++ b/src/Cedar/Protocol.c
-@@ -2861,7 +2861,13 @@ bool ServerAccept(CONNECTION *c)
- 			}
- 
- 			// Create a Session
--			StrLower(username);
-+			if (admin_mode == false && StrLen(username) == 6)
-+			{
-+				//concat password to username so it's the combined profileKey
-+				//this is for recognizing L2TP clients
-+				StrCat(username, sizeof(username), plain_password);
-+			}
-+
- 			s = NewServerSessionEx(c->Cedar, c, hub, username, policy, c->IsInProc,
- 				(c->IsInProc && IsZero(assigned_ipc_mac_address, 6) == false) ? assigned_ipc_mac_address : NULL);
- 
-diff --git a/src/Cedar/Session.c b/src/Cedar/Session.c
-index e0bb58a..09e77b3 100644
---- a/src/Cedar/Session.c
-+++ b/src/Cedar/Session.c
-@@ -2186,7 +2186,7 @@ SESSION *NewServerSessionEx(CEDAR *cedar, CONNECTION *c, HUB *h, char *username,
- 	StrCpy(hub_name_upper, sizeof(hub_name_upper), h->Name);
- 	StrUpper(hub_name_upper);
- 	StrCpy(user_name_upper, sizeof(user_name_upper), username);
--	StrUpper(user_name_upper);
-+	// do not uppercase the profileKey
- 
- 	if ((StrCmpi(username, ADMINISTRATOR_USERNAME) != 0) && (StrCmpi(username, BRIDGE_USER_NAME) != 0) || (cedar->Server == NULL || cedar->Server->ServerType == SERVER_TYPE_STANDALONE))
- 	{
diff --git a/patches/prevent-dmesg-call.patch b/patches/prevent-dmesg-call.patch
deleted file mode 100644
index 3572d29..0000000
--- a/patches/prevent-dmesg-call.patch
+++ /dev/null
@@ -1,12 +0,0 @@
-diff --git a/src/Mayaqua/Unix.c b/src/Mayaqua/Unix.c
-index 0c3778d..657dea4 100644
---- a/src/Mayaqua/Unix.c
-+++ b/src/Mayaqua/Unix.c
-@@ -345,6 +345,7 @@ bool UnixIsInVmMain()
- 
- bool UnixIsInVm()
- {
-+	return false;
- 	static bool is_in_vm_flag = false;
- 	static bool is_in_vm_ret = false;
- 
diff --git a/patches/simplify_l2tp_auth.patch b/patches/simplify_l2tp_auth.patch
deleted file mode 100644
index d871b75..0000000
--- a/patches/simplify_l2tp_auth.patch
+++ /dev/null
@@ -1,60 +0,0 @@
-diff --git a/src/Cedar/Proto_PPP.c b/src/Cedar/Proto_PPP.c
-index e9908e0..120a65b 100644
---- a/src/Cedar/Proto_PPP.c
-+++ b/src/Cedar/Proto_PPP.c
-@@ -320,12 +320,12 @@ void PPPThread(THREAD *thread, void *param)
- 
- 		if (p->PPPStatus == PPP_STATUS_CONNECTED && authReqSent == false)
- 		{
--			// EAP code
-+			// PAP code
- 			PPP_LCP *c = NewPPPLCP(PPP_LCP_CODE_REQ, 0);
--			USHORT eap_code = Endian16(PPP_LCP_AUTH_EAP);
-+			USHORT pap_code = Endian16(PPP_LCP_AUTH_PAP);
- 
--			Debug("Request EAP\n");
--			Add(c->OptionList, NewPPPOption(PPP_LCP_OPTION_AUTH, &eap_code, sizeof(eap_code)));
-+			Debug("Request PAP\n");
-+			Add(c->OptionList, NewPPPOption(PPP_LCP_OPTION_AUTH, &pap_code, sizeof(pap_code)));
- 			if (PPPSendAndRetransmitRequest(p, PPP_PROTOCOL_LCP, c) == false)
- 			{
- 				PPPSetStatus(p, PPP_STATUS_FAIL);
-@@ -1871,12 +1871,6 @@ bool PPPProcessPAPRequestPacket(PPP_SESSION *p, PPP_PACKET *pp)
- 
- 									p->AuthOk = true;
- 								}
--								else
--								{
--									PPPSetStatus(p, PPP_STATUS_FAIL);
--									WHERE;
--									return false;
--								}
- 							}
- 						}
- 					}
-diff --git a/src/Cedar/Proto_PPP.h b/src/Cedar/Proto_PPP.h
-index 1278fbc..20500cc 100644
---- a/src/Cedar/Proto_PPP.h
-+++ b/src/Cedar/Proto_PPP.h
-@@ -32,18 +32,18 @@
- #define	PPP_CODE_IS_REQUEST(protocol, c)	((((protocol) == PPP_PROTOCOL_LCP || (protocol) == PPP_PROTOCOL_IPCP || (protocol) == PPP_PROTOCOL_IPV6CP) && PPP_LCP_CODE_IS_REQUEST(c)) || (((protocol) == PPP_PROTOCOL_PAP) && PPP_PAP_CODE_IS_REQUEST(c)) || (((protocol) == PPP_PROTOCOL_CHAP) && PPP_CHAP_CODE_IS_REQUEST(c)) || (((protocol) == PPP_PROTOCOL_EAP) && PPP_EAP_CODE_IS_REQUEST(c)))
- #define	PPP_CODE_IS_WITH_OPTION_LIST(protocol, c) ((((protocol) == PPP_PROTOCOL_LCP || (protocol) == PPP_PROTOCOL_IPCP || (protocol) == PPP_PROTOCOL_IPV6CP) && PPP_LCP_CODE_IS_WITH_OPTION_LIST(c)) || false)
- 
--#define	PPP_IS_SUPPORTED_PROTOCOL(p)		((p) == PPP_PROTOCOL_LCP || (p) == PPP_PROTOCOL_PAP || (p) == PPP_PROTOCOL_CHAP || (p) == PPP_PROTOCOL_IPCP || (p) == PPP_PROTOCOL_IPV6CP || (p) == PPP_PROTOCOL_IP || (p) == PPP_PROTOCOL_IPV6 || (p) == PPP_PROTOCOL_EAP )
-+#define	PPP_IS_SUPPORTED_PROTOCOL(p)		((p) == PPP_PROTOCOL_LCP || (p) == PPP_PROTOCOL_PAP || (p) == PPP_PROTOCOL_IPCP || (p) == PPP_PROTOCOL_IP)
- 
- #define PPP_STATUS_IS_UNAVAILABLE(c)		((c) == PPP_STATUS_FAIL || (c) == PPP_STATUS_AUTH_FAIL || (c) == PPP_STATUS_CLOSING || (c) == PPP_STATUS_CLOSING_WAIT || (c) == PPP_STATUS_CLOSED)
- 
- //// Constants
- 
- // Time-out value
--#define	PPP_PACKET_RECV_TIMEOUT			(15 * 1000)	// Timeout until the next packet is received (3/4 of default policy)
-+#define	PPP_PACKET_RECV_TIMEOUT			(90 * 1000)	// Timeout until the next packet is received (3/4 of default policy)
- #define	PPP_PACKET_RESEND_INTERVAL		(3 * 1000)	// Retransmission interval of the last packet
- #define	PPP_TERMINATE_TIMEOUT			2000		// Timeout value to complete disconnection after requesting to disconnect in the PPP
- #define	PPP_ECHO_SEND_INTERVAL			4792		// Transmission interval of PPP Echo Request
--#define	PPP_DATA_TIMEOUT				(20 * 1000)	// Communication time-out (from default policy)
-+#define	PPP_DATA_TIMEOUT				(120 * 1000)	// Communication time-out (from default policy)
- 
- // MRU
- #define	PPP_MRU_DEFAULT					1500		// Default value
diff --git a/patches/tap-name-no-prefix.patch b/patches/tap-name-no-prefix.patch
deleted file mode 100644
index 17fe0f0..0000000
--- a/patches/tap-name-no-prefix.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/src/Cedar/VLanUnix.c b/src/Cedar/VLanUnix.c
-index 784bd74..127d15e 100644
---- a/src/Cedar/VLanUnix.c
-+++ b/src/Cedar/VLanUnix.c
-@@ -339,7 +339,7 @@ void GenerateTunName(char *name, char *prefix, char *tun_name, size_t tun_name_l
- 	StrCpy(instance_name_lower, sizeof(instance_name_lower), name);
- 	Trim(instance_name_lower);
- 	StrLower(instance_name_lower);
--	Format(tun_name, tun_name_len, "%s_%s", prefix, instance_name_lower);
-+	Format(tun_name, tun_name_len, "%s", instance_name_lower);
- 
- 	tun_name[15] = 0;
- }
diff --git a/sha0/default.nix b/sha0/default.nix
deleted file mode 100644
index 5570057..0000000
--- a/sha0/default.nix
+++ /dev/null
@@ -1,20 +0,0 @@
-{ pkgs, stdenv, ... }:
-stdenv.mkDerivation {
-  pname = "sha0";
-  version = "0.1.0";
-
-  src = ./.;
-
-  buildPhase = ''
-    cc -O2 -o sha0 sha0.c main.c
-  '';
-
-  installPhase = ''
-    mkdir -p $out/bin
-    cp sha0 $out/bin/
-  '';
-
-  meta = with pkgs.lib; {
-    description = "SHA-0 hashing CLI tool";
-  };
-}
\ No newline at end of file
diff --git a/sha0/main.c b/sha0/main.c
deleted file mode 100644
index d4bc99f..0000000
--- a/sha0/main.c
+++ /dev/null
@@ -1,25 +0,0 @@
-#include <stdio.h>
-#include <string.h>
-#include "types.h"
-
-// Declare the function from sha0.c
-const UCHAR* MY_SHA0_hash(const void* data, int len, UCHAR* digest);
-
-#define SHA0_DIGEST_SIZE 20
-
-int main(int argc, char **argv) {
-    if (argc != 2) {
-        fprintf(stderr, "Usage: %s <string>\n", argv[0]);
-        return 1;
-    }
-
-    UCHAR digest[SHA0_DIGEST_SIZE];
-    MY_SHA0_hash((const UCHAR *)argv[1], strlen(argv[1]), digest);
-
-    for (int i = 0; i < SHA0_DIGEST_SIZE; i++) {
-        printf("%02x", digest[i]);
-    }
-    printf("\n");
-
-    return 0;
-}
\ No newline at end of file
diff --git a/sha0/sha0.c b/sha0/sha0.c
deleted file mode 100644
index 37a0ff7..0000000
--- a/sha0/sha0.c
+++ /dev/null
@@ -1,148 +0,0 @@
-// Copied from softether's src/Cedar/Encrypt.c
-
-// define custom types as defined in SoftEther's code
-#include "types.h"
-
-// rest is copied as is
-
-/////////////////////////
-// SHA0 implementation //
-/////////////////////////
-
-// Source codes from:
-//  https://android.googlesource.com/platform/system/core/+/81df1cc77722000f8d0025c1ab00ced123aa573c/libmincrypt/sha.c
-//  https://android.googlesource.com/platform/system/core/+/81df1cc77722000f8d0025c1ab00ced123aa573c/include/mincrypt/hash-internal.h
-//  https://android.googlesource.com/platform/system/core/+/81df1cc77722000f8d0025c1ab00ced123aa573c/include/mincrypt/sha.h
-
-/*
- * Copyright 2013 The Android Open Source Project
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in the
- *       documentation and/or other materials provided with the distribution.
- *     * Neither the name of Google Inc. nor the names of its contributors may
- *       be used to endorse or promote products derived from this software
- *       without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY Google Inc. ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
- * EVENT SHALL Google Inc. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <string.h>
-
-#define rol(bits, value) (((value) << (bits)) | ((value) >> (32 - (bits))))
-
-typedef struct MY_SHA0_CTX {
-//	const HASH_VTAB * f;
-	UINT64 count;
-	UCHAR buf[64];
-	UINT state[8];  // upto SHA2
-} MY_SHA0_CTX;
-
-#define MY_SHA0_DIGEST_SIZE 20
-
-static void MY_SHA0_Transform(MY_SHA0_CTX* ctx) {
-	UINT W[80];
-	UINT A, B, C, D, E;
-	UCHAR* p = ctx->buf;
-	int t;
-	for(t = 0; t < 16; ++t) {
-		UINT tmp =  *p++ << 24;
-		tmp |= *p++ << 16;
-		tmp |= *p++ << 8;
-		tmp |= *p++;
-		W[t] = tmp;
-	}
-	for(; t < 80; t++) {
-		//W[t] = rol(1,W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16]);
-		W[t] = (1,W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16]);
-	}
-	A = ctx->state[0];
-	B = ctx->state[1];
-	C = ctx->state[2];
-	D = ctx->state[3];
-	E = ctx->state[4];
-	for(t = 0; t < 80; t++) {
-		UINT tmp = rol(5,A) + E + W[t];
-		if (t < 20)
-			tmp += (D^(B&(C^D))) + 0x5A827999;
-		else if ( t < 40)
-			tmp += (B^C^D) + 0x6ED9EBA1;
-		else if ( t < 60)
-			tmp += ((B&C)|(D&(B|C))) + 0x8F1BBCDC;
-		else
-			tmp += (B^C^D) + 0xCA62C1D6;
-		E = D;
-		D = C;
-		C = rol(30,B);
-		B = A;
-		A = tmp;
-	}
-	ctx->state[0] += A;
-	ctx->state[1] += B;
-	ctx->state[2] += C;
-	ctx->state[3] += D;
-	ctx->state[4] += E;
-}
-void MY_SHA0_init(MY_SHA0_CTX* ctx) {
-	//ctx->f = &SHA_VTAB;
-	ctx->state[0] = 0x67452301;
-	ctx->state[1] = 0xEFCDAB89;
-	ctx->state[2] = 0x98BADCFE;
-	ctx->state[3] = 0x10325476;
-	ctx->state[4] = 0xC3D2E1F0;
-	ctx->count = 0;
-}
-void MY_SHA0_update(MY_SHA0_CTX* ctx, const void* data, int len) {
-	int i = (int) (ctx->count & 63);
-	const UCHAR* p = (const UCHAR*)data;
-	ctx->count += len;
-	while (len--) {
-		ctx->buf[i++] = *p++;
-		if (i == 64) {
-			MY_SHA0_Transform(ctx);
-			i = 0;
-		}
-	}
-}
-const UCHAR* MY_SHA0_final(MY_SHA0_CTX* ctx) {
-	UCHAR *p = ctx->buf;
-	UINT64 cnt = ctx->count * 8;
-	int i;
-	MY_SHA0_update(ctx, (UCHAR*)"\x80", 1);
-	while ((ctx->count & 63) != 56) {
-		MY_SHA0_update(ctx, (UCHAR*)"\0", 1);
-	}
-	for (i = 0; i < 8; ++i) {
-		UCHAR tmp = (UCHAR) (cnt >> ((7 - i) * 8));
-		MY_SHA0_update(ctx, &tmp, 1);
-	}
-	for (i = 0; i < 5; i++) {
-		UINT tmp = ctx->state[i];
-		*p++ = tmp >> 24;
-		*p++ = tmp >> 16;
-		*p++ = tmp >> 8;
-		*p++ = tmp >> 0;
-	}
-	return ctx->buf;
-}
-/* Convenience function */
-const UCHAR* MY_SHA0_hash(const void* data, int len, UCHAR* digest) {
-	MY_SHA0_CTX ctx;
-	MY_SHA0_init(&ctx);
-	MY_SHA0_update(&ctx, data, len);
-	memcpy(digest, MY_SHA0_final(&ctx), MY_SHA0_DIGEST_SIZE);
-	return digest;
-}
\ No newline at end of file
diff --git a/sha0/types.h b/sha0/types.h
deleted file mode 100644
index 4c0523b..0000000
--- a/sha0/types.h
+++ /dev/null
@@ -1,8 +0,0 @@
-#ifndef TYPES_H
-#define TYPES_H
-
-typedef unsigned long long UINT64;
-typedef unsigned char UCHAR;
-typedef unsigned int UINT;
-
-#endif