diff --git a/binaries/aarch64/nfqws b/binaries/aarch64/nfqws
index 5a2881a..3fb86f4 100755
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diff --git a/binaries/arm/nfqws b/binaries/arm/nfqws
index b4b3671..cc57966 100755
Binary files a/binaries/arm/nfqws and b/binaries/arm/nfqws differ
diff --git a/binaries/freebsd-x64/dvtws b/binaries/freebsd-x64/dvtws
index 91c4b9b..dd08c73 100755
Binary files a/binaries/freebsd-x64/dvtws and b/binaries/freebsd-x64/dvtws differ
diff --git a/binaries/mips32r1-lsb/nfqws b/binaries/mips32r1-lsb/nfqws
index c17afd0..f013a69 100755
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diff --git a/binaries/mips32r1-msb/nfqws b/binaries/mips32r1-msb/nfqws
index 7227c91..947a9bd 100755
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diff --git a/binaries/mips64r2-msb/nfqws b/binaries/mips64r2-msb/nfqws
index f15282d..e9163e5 100755
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diff --git a/binaries/ppc/nfqws b/binaries/ppc/nfqws
index 7e700cf..646ef60 100755
Binary files a/binaries/ppc/nfqws and b/binaries/ppc/nfqws differ
diff --git a/binaries/win64/WinDivert.dll b/binaries/win64/WinDivert.dll
index 50ca874..628a8b4 100644
Binary files a/binaries/win64/WinDivert.dll and b/binaries/win64/WinDivert.dll differ
diff --git a/binaries/win64/ip2net.exe b/binaries/win64/ip2net.exe
index 5796e9c..9020266 100644
Binary files a/binaries/win64/ip2net.exe and b/binaries/win64/ip2net.exe differ
diff --git a/binaries/win64/mdig.exe b/binaries/win64/mdig.exe
index 8006737..1781520 100644
Binary files a/binaries/win64/mdig.exe and b/binaries/win64/mdig.exe differ
diff --git a/binaries/win64/winws.exe b/binaries/win64/winws.exe
index 96acdde..2cf5c1e 100644
Binary files a/binaries/win64/winws.exe and b/binaries/win64/winws.exe differ
diff --git a/binaries/win64/zapret-winws/WinDivert.dll b/binaries/win64/zapret-winws/WinDivert.dll
index 50ca874..628a8b4 100644
Binary files a/binaries/win64/zapret-winws/WinDivert.dll and b/binaries/win64/zapret-winws/WinDivert.dll differ
diff --git a/binaries/win64/zapret-winws/winws.exe b/binaries/win64/zapret-winws/winws.exe
index 96acdde..2cf5c1e 100644
Binary files a/binaries/win64/zapret-winws/winws.exe and b/binaries/win64/zapret-winws/winws.exe differ
diff --git a/binaries/x86/nfqws b/binaries/x86/nfqws
index a7af3b6..2399df1 100755
Binary files a/binaries/x86/nfqws and b/binaries/x86/nfqws differ
diff --git a/binaries/x86_64/nfqws b/binaries/x86_64/nfqws
index 7ee4528..0472a7f 100755
Binary files a/binaries/x86_64/nfqws and b/binaries/x86_64/nfqws differ
diff --git a/blockcheck.sh b/blockcheck.sh
index 834249c..ea23927 100755
--- a/blockcheck.sh
+++ b/blockcheck.sh
@@ -1009,7 +1009,7 @@ pktws_check_domain_http_bypass_()
 		ok=1
 	}
 	[ "$ret" != 0 -o "$SCANLEVEL" = force ] && {
-		[ "$sec" = 0 ] && {
+		if [ "$sec" = 0 ]; then
 			pktws_curl_test_update $1 $3 $s --hostcase && {
 				[ "$SCANLEVEL" = quick ] && return
 				ok=1
@@ -1022,15 +1022,14 @@ pktws_check_domain_http_bypass_()
 					}
 				done
 			done
-		}
-		[ "$sec" = 1 ] && {
+		else
 			for pos in sni sniext; do
 				pktws_curl_test_update $1 $3 $s --dpi-desync-split-tls=$pos && {
 					[ "$SCANLEVEL" = quick ] && return
 					ok=1
 				}
 			done
-		}
+		fi
 		for pos in 1 3 4 5 10 50; do
 			s="--dpi-desync=split2 --dpi-desync-split-pos=$pos"
 			if pktws_curl_test_update $1 $3 $s; then
@@ -1100,6 +1099,22 @@ pktws_check_domain_http_bypass_()
 			}			
 		done
 
+		for desync in split2 disorder2; do
+			s="--dpi-desync=$desync"
+			if [ "$sec" = 0 ]; then
+				for pos in method host; do
+					pktws_curl_test_update $1 $3 $s --dpi-desync-split-seqovl=1 --dpi-desync-split-http-req=$pos $e && [ "$SCANLEVEL" = quick ] && return
+				done
+			else
+				for pos in sni sniext; do
+					pktws_curl_test_update $1 $3 $s --dpi-desync-split-seqovl=1 --dpi-desync-split-tls=$pos $e && [ "$SCANLEVEL" = quick ] && return
+				done
+			fi
+			for pos in 2 3 4 5 10 50; do
+				pktws_curl_test_update $1 $3 $s --dpi-desync-split-seqovl=$(($pos - 1))  --dpi-desync-split-pos=$pos $e && [ "$SCANLEVEL" = quick ] && return
+			done
+		done
+
 		s="http_iana_org.bin"
 		[ "$sec" = 0 ] || s="tls_clienthello_iana_org.bin"
 		for desync in syndata syndata,split2 syndata,disorder2 syndata,split2 syndata,disorder2 ; do
diff --git a/docs/changes.txt b/docs/changes.txt
index 50ba608..9bf80dd 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -294,3 +294,8 @@ tpws: --split-tls
 tpws: --tlsrec=sniext
 nfqws: --dpi-desync-split-http-req, --dpi-desync-split-tls. multi segment TLS support for split.
 blockcheck: mdig dns cache
+
+v60
+
+blockcheck: port block test, partial ip block test
+nfqws: seqovl split/disorder modes
diff --git a/docs/readme.eng.md b/docs/readme.eng.md
index 392f25f..635761a 100644
--- a/docs/readme.eng.md
+++ b/docs/readme.eng.md
@@ -180,6 +180,8 @@ nfqws takes the following parameters:
  --dpi-desync-split-pos=<1..9216>               ; data payload split position
  --dpi-desync-split-http-req=method|host        ; split at specified logical part of plain http request
  --dpi-desync-split-tls=sni|sniext              ; split at specified logical part of TLS ClientHello
+ --dpi-desync-split-seqovl=<int>                ; use sequence overlap before first sent original split segment
+ --dpi-desync-split-seqovl-pattern=<filename>|0xHEX ; pattern for the fake part of overlap
  --dpi-desync-ipfrag-pos-tcp=<8..9216>          ; ip frag position starting from the transport header. multiple of 8, default 8.
  --dpi-desync-ipfrag-pos-udp=<8..9216>          ; ip frag position starting from the transport header. multiple of 8, default 32.
  --dpi-desync-badseq-increment=<int|0xHEX>      ; badseq fooling seq signed increment. default -10000
@@ -292,6 +294,16 @@ Mode `split2` disables sending of fake segments. It can be used as a faster alte
 
 In `disorder2` and 'split2` modes no fake packets are sent, so ttl and fooling options are not required.
 
+`seqovl` adds to the first sent original segment (1st for split, 2nd for disorder) seqovl bytes to the beginning and decreases
+sequence number.
+In `split2` mode this creates partially in-window packet. OS receives only in-window part.
+In `disorder2` mode OS receives fake and real part of the second segment but does not pass received data to the socket until first
+segment is received. First segment overwrites fake part of the second segment. Then OS passes original data to the socket.
+All unix OS preserve last received data. This may not be the case for Windows servers and may not work.
+Disorder requires `seqovl` to be less than `split_pos`. Either statically defined or automatically calculated.
+Otherwise desync is not possible and will not happen.
+Method allows to avoid separate fakes. Fakes and real data are mixed.
+
 `hopbyhop`, `destopt` and `ipfrag1` desync modes (they're not the same as `hopbyhop` fooling !) are ipv6 only. One `hop-by-hop`,
 `destination options` or `fragment` header is added to all desynced packets.
 Extra header increases packet size and can't be applied to the maximum size packets.
diff --git a/docs/readme.txt b/docs/readme.txt
index 2865ff9..cfd762f 100644
--- a/docs/readme.txt
+++ b/docs/readme.txt
@@ -1,4 +1,4 @@
-zapret v.59
+zapret v.60
 
 English
 -------
@@ -253,6 +253,8 @@ nfqws
  --dpi-desync-split-pos=<1..1500>		; (только для split*, disorder*) разбивать пакет на указанной позиции
  --dpi-desync-split-http-req=method|host        ; разбивка http request на указанном логическом месте
  --dpi-desync-split-tls=sni|sniext              ; разбивка tls client hello на указанном логическом месте
+ --dpi-desync-split-seqovl=<int>                ; использовать sequence overlap перед первым отсылаемым оригинальным tcp сегментом
+ --dpi-desync-split-seqovl-pattern=<filename>|0xHEX ; чем заполнять фейковую часть overlap
  --dpi-desync-badseq-increment=<int|0xHEX>      ; инкремент sequence number для badseq. по умолчанию -10000
  --dpi-desync-badack-increment=<int|0xHEX>      ; инкремент ack sequence number для badseq. по умолчанию -66000
  --dpi-desync-any-protocol=0|1                  ; 0(default)=работать только по http request и tls clienthello  1=по всем непустым пакетам данных
@@ -379,6 +381,26 @@ fakeknown отличается от fake тем, что применяется 
 
 disorder2 и split2 не предполагают отсылку фейк пакетов, поэтому опции ttl и fooling неактуальны.
 
+seqovl добавляет в начало первой отсылаемой части оригинального пакета (1 часть для split и 2 часть для disorder)
+seqovl байт со смещенным в минус sequence number на величину seqovl.
+В случае split2 расчет идет на то, что предыдущий отсыл, если он был, уже попал в сокет серверного приложения,
+поэтому новая пришедшая часть лишь частично находится в пределах текущего окна (in-window).
+Спереди фейковая часть отбрасывается, а оставшаяся часть содержит оригинал и начинается с начала window,
+поэтому попадает в сокет.
+Серверное приложение получает все, что реально отсылает клиент, отбрасывая фейковую out-of-window часть.
+Но DPI не может этого понять, поэтому у него происходит sequence десинхронизация.
+
+Для disorder2 overlap идет на 2-ю часть пакета. Обязательно, чтобы seqovl был меньше split_pos, иначе
+все отосланное будет передано в сокет сразу же, включая фейк, ломая протокол прикладного уровня.
+При соблюдении этого условия 2-я часть пакета является полностью in-window,
+поэтому серверная ОС принимает ее целиком, включая фейк. Но поскольку начальная часть данных из 1 пакета еще не принята,
+то фейк и реальные данные остаются в памяти ядра, не отправляясь в серверное приложение. Как только приходит 1-я часть пакета,
+она переписывает фейковую часть в памяти ядра. Ядро получает данные из 1 и 2 части, поэтому далее
+идет отправка в сокет приложения. Таково поведение всех unix ОС - оставлять последние принятые данные.
+Для windows серверов может быть наоборот, поэтому не факт, что такой вариант будет на них работать.
+Метод позволяет обойтись без fooling и TTL. Фейки перемешаны с реальным данными.
+split/disorder вместо split2/disorder2 по-прежнему добавляют дополнительные отдельные фейки.
+
 Режимы десинхронизации hopbyhop, destopt и ipfrag1 (не путать с fooling !) относятся только к ipv6 и заключается
 в добавлении хедера "hop-by-hop options" , "destination options" или "fragment" во все пакеты, попадающие под десинхронизацию.
 Здесь надо обязательно понимать, что добавление хедера увеличивает размер пакета, потому не может быть применено
diff --git a/nfq/desync.c b/nfq/desync.c
index 5f49c65..2911a24 100644
--- a/nfq/desync.c
+++ b/nfq/desync.c
@@ -959,17 +959,41 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
 			case DESYNC_DISORDER2:
 				if (split_pos)
 				{
-					uint8_t fakeseg[DPI_DESYNC_MAX_FAKE_LEN+100];
-					size_t fakeseg_len;
+					uint8_t fakeseg[DPI_DESYNC_MAX_FAKE_LEN+100], *seg;
+					size_t seg_len;
+
+					if (params.desync_seqovl>=split_pos)
+					{
+						DLOG("seqovl>=split_pos. desync is not possible.\n")
+						return verdict;
+					}
 
 					if (split_pos<len_payload)
 					{
-						if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, flags_orig, net32_add(tcphdr->th_seq,split_pos), tcphdr->th_ack, tcphdr->th_win, scale_factor, timestamps,
+						if (params.desync_seqovl)
+						{
+							seg_len = len_payload-split_pos+params.desync_seqovl;
+							if (seg_len>sizeof(fakeseg))
+							{
+								DLOG("seqovl is too large\n")
+								return verdict;
+							}
+							fill_pattern(fakeseg,params.desync_seqovl,params.seqovl_pattern,sizeof(params.seqovl_pattern));
+							memcpy(fakeseg+params.desync_seqovl,data_payload+split_pos,len_payload-split_pos);
+							seg = fakeseg;
+						}
+						else
+						{
+							seg = data_payload+split_pos;
+							seg_len = len_payload-split_pos;
+						}
+
+						if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, flags_orig, net32_add(net32_add(tcphdr->th_seq,split_pos),-params.desync_seqovl), tcphdr->th_ack, tcphdr->th_win, scale_factor, timestamps,
 								ttl_orig,fooling_orig,params.desync_badseq_increment,params.desync_badseq_ack_increment,
-								data_payload+split_pos, len_payload-split_pos, pkt1, &pkt1_len))
+								seg, seg_len, pkt1, &pkt1_len))
 							return verdict;
-						DLOG("sending 2nd out-of-order tcp segment %zu-%zu len=%zu : ",split_pos,len_payload-1, len_payload-split_pos)
-						hexdump_limited_dlog(data_payload+split_pos,len_payload-split_pos,PKTDATA_MAXDUMP); DLOG("\n")
+						DLOG("sending 2nd out-of-order tcp segment %zu-%zu len=%zu seqovl=%u : ",split_pos,len_payload-1, len_payload-split_pos, params.desync_seqovl)
+						hexdump_limited_dlog(seg,seg_len,PKTDATA_MAXDUMP); DLOG("\n")
 						if (!rawsend((struct sockaddr *)&dst, desync_fwmark, ifout , pkt1, pkt1_len))
 							return verdict;
 					}
@@ -977,18 +1001,17 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
 
 					if (desync_mode==DESYNC_DISORDER)
 					{
-						fakeseg_len = sizeof(fakeseg);
+						seg_len = sizeof(fakeseg);
 						if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, flags_orig, tcphdr->th_seq, tcphdr->th_ack, tcphdr->th_win, scale_factor, timestamps,
 								ttl_fake,params.desync_fooling_mode,params.desync_badseq_increment,params.desync_badseq_ack_increment,
-								zeropkt, split_pos, fakeseg, &fakeseg_len))
+								zeropkt, split_pos, fakeseg, &seg_len))
 							return verdict;
 						DLOG("sending fake(1) 1st out-of-order tcp segment 0-%zu len=%zu : ",split_pos-1, split_pos)
 						hexdump_limited_dlog(zeropkt,split_pos,PKTDATA_MAXDUMP); DLOG("\n")
-						if (!rawsend_rep((struct sockaddr *)&dst, desync_fwmark, ifout , fakeseg, fakeseg_len))
+						if (!rawsend_rep((struct sockaddr *)&dst, desync_fwmark, ifout , fakeseg, seg_len))
 							return verdict;
 					}
 
-
 					pkt1_len = sizeof(pkt1);
 					if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, flags_orig, tcphdr->th_seq, tcphdr->th_ack, tcphdr->th_win, scale_factor, timestamps,
 							ttl_orig,fooling_orig,params.desync_badseq_increment,params.desync_badseq_ack_increment,
@@ -1003,7 +1026,7 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
 					{
 						DLOG("sending fake(2) 1st out-of-order tcp segment 0-%zu len=%zu : ",split_pos-1, split_pos)
 						hexdump_limited_dlog(zeropkt,split_pos,PKTDATA_MAXDUMP); DLOG("\n")
-						if (!rawsend_rep((struct sockaddr *)&dst, desync_fwmark, ifout , fakeseg, fakeseg_len))
+						if (!rawsend_rep((struct sockaddr *)&dst, desync_fwmark, ifout , fakeseg, seg_len))
 							return verdict;
 					}
 
@@ -1014,8 +1037,8 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
 			case DESYNC_SPLIT2:
 				if (split_pos)
 				{
-					uint8_t fakeseg[DPI_DESYNC_MAX_FAKE_LEN+100];
-					size_t fakeseg_len;
+					uint8_t fakeseg[DPI_DESYNC_MAX_FAKE_LEN+100],ovlseg[DPI_DESYNC_MAX_FAKE_LEN+100], *seg;
+					size_t fakeseg_len,seg_len;
 
 					if (desync_mode==DESYNC_SPLIT)
 					{
@@ -1030,13 +1053,30 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
 							return verdict;
 					}
 
-					pkt1_len = sizeof(pkt1);
-					if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, flags_orig, tcphdr->th_seq, tcphdr->th_ack, tcphdr->th_win, scale_factor, timestamps,
+					if (params.desync_seqovl)
+					{
+						seg_len = split_pos+params.desync_seqovl;
+						if (seg_len>sizeof(ovlseg))
+						{
+							DLOG("seqovl is too large")
+							return verdict;
+						}
+						fill_pattern(ovlseg,params.desync_seqovl,params.seqovl_pattern,sizeof(params.seqovl_pattern));
+						memcpy(ovlseg+params.desync_seqovl,data_payload,split_pos);
+						seg = ovlseg;
+					}
+					else
+					{
+						seg = data_payload;
+						seg_len = split_pos;
+					}
+
+					if (!prepare_tcp_segment((struct sockaddr *)&src, (struct sockaddr *)&dst, flags_orig, net32_add(tcphdr->th_seq,-params.desync_seqovl), tcphdr->th_ack, tcphdr->th_win, scale_factor, timestamps,
 							ttl_orig,fooling_orig,params.desync_badseq_increment,params.desync_badseq_ack_increment,
-							data_payload, split_pos, pkt1, &pkt1_len))
+							seg, seg_len, pkt1, &pkt1_len))
 						return verdict;
-					DLOG("sending 1st tcp segment 0-%zu len=%zu : ",split_pos-1, split_pos)
-					hexdump_limited_dlog(data_payload,split_pos,PKTDATA_MAXDUMP); DLOG("\n")
+					DLOG("sending 1st tcp segment 0-%zu len=%zu seqovl=%u : ",split_pos-1, split_pos, params.desync_seqovl)
+					hexdump_limited_dlog(seg,seg_len,PKTDATA_MAXDUMP); DLOG("\n")
 					if (!rawsend((struct sockaddr *)&dst, desync_fwmark, ifout , pkt1, pkt1_len))
 						return verdict;
 
@@ -1047,7 +1087,6 @@ static uint8_t dpi_desync_tcp_packet_play(bool replay, size_t reasm_offset, uint
 						if (!rawsend_rep((struct sockaddr *)&dst, desync_fwmark, ifout , fakeseg, fakeseg_len))
 							return verdict;
 					}
-
 					if (split_pos<len_payload)
 					{
 						pkt1_len = sizeof(pkt1);
diff --git a/nfq/nfqws.c b/nfq/nfqws.c
index 841d607..7998b5b 100644
--- a/nfq/nfqws.c
+++ b/nfq/nfqws.c
@@ -832,11 +832,13 @@ static void exithelp(void)
 		" --dpi-desync-split-pos=<1..%u>\t\t; data payload split position\n"
 		" --dpi-desync-split-http-req=method|host\t; split at specified logical part of plain http request\n"
 		" --dpi-desync-split-tls=sni|sniext\t\t; split at specified logical part of TLS ClientHello\n"
+		" --dpi-desync-split-seqovl=<int>\t\t; use sequence overlap before first sent original split segment\n"
+		" --dpi-desync-split-seqovl-pattern=<filename>|0xHEX ; pattern for the fake part of overlap\n"
 		" --dpi-desync-ipfrag-pos-tcp=<8..%u>\t\t; ip frag position starting from the transport header. multiple of 8, default %u.\n"
 		" --dpi-desync-ipfrag-pos-udp=<8..%u>\t\t; ip frag position starting from the transport header. multiple of 8, default %u.\n"
 		" --dpi-desync-badseq-increment=<int|0xHEX>\t; badseq fooling seq signed increment. default %d\n"
 		" --dpi-desync-badack-increment=<int|0xHEX>\t; badseq fooling ackseq signed increment. default %d\n"
-		" --dpi-desync-any-protocol=0|1\t\t\t; 0(default)=desync only known protocols  1=desync any nonempty data packet\n"
+		" --dpi-desync-any-protocol=0|1\t\t\t; 0(default)=desync only http and tls  1=desync any nonempty data packet\n"
 		" --dpi-desync-fake-http=<filename>|0xHEX\t; file containing fake http request\n"
 		" --dpi-desync-fake-tls=<filename>|0xHEX\t\t; file containing fake TLS ClientHello (for https)\n"
 		" --dpi-desync-fake-unknown=<filename>|0xHEX\t; file containing unknown protocol fake payload\n"
@@ -1009,42 +1011,44 @@ int main(int argc, char **argv)
 		{"dpi-desync-split-pos",required_argument,0,0},// optidx=23
 		{"dpi-desync-split-http-req",required_argument,0,0 },// optidx=24
 		{"dpi-desync-split-tls",required_argument,0,0 },// optidx=25
-		{"dpi-desync-ipfrag-pos-tcp",required_argument,0,0},// optidx=26
-		{"dpi-desync-ipfrag-pos-udp",required_argument,0,0},// optidx=27
-		{"dpi-desync-badseq-increment",required_argument,0,0},// optidx=28
-		{"dpi-desync-badack-increment",required_argument,0,0},// optidx=29
-		{"dpi-desync-any-protocol",optional_argument,0,0},// optidx=30
-		{"dpi-desync-fake-http",required_argument,0,0},// optidx=31
-		{"dpi-desync-fake-tls",required_argument,0,0},// optidx=32
-		{"dpi-desync-fake-unknown",required_argument,0,0},// optidx=33
-		{"dpi-desync-fake-syndata",required_argument,0,0},// optidx=34
-		{"dpi-desync-fake-quic",required_argument,0,0},// optidx=35
-		{"dpi-desync-fake-wireguard",required_argument,0,0},// optidx=36
-		{"dpi-desync-fake-dht",required_argument,0,0},// optidx=37
-		{"dpi-desync-fake-unknown-udp",required_argument,0,0},// optidx=38
-		{"dpi-desync-udplen-increment",required_argument,0,0},// optidx=39
-		{"dpi-desync-udplen-pattern",required_argument,0,0},// optidx=40
-		{"dpi-desync-cutoff",required_argument,0,0},// optidx=41
-		{"dpi-desync-start",required_argument,0,0},// optidx=42
-		{"hostlist",required_argument,0,0},		// optidx=43
-		{"hostlist-exclude",required_argument,0,0},	// optidx=44
-		{"hostlist-auto",required_argument,0,0},	// optidx=45
-		{"hostlist-auto-fail-threshold",required_argument,0,0},	// optidx=46
-		{"hostlist-auto-fail-time",required_argument,0,0},	// optidx=47
-		{"hostlist-auto-retrans-threshold",required_argument,0,0},	// optidx=48
-		{"hostlist-auto-debug",required_argument,0,0},	// optidx=49
+		{"dpi-desync-split-seqovl",required_argument,0,0 },// optidx=26
+		{"dpi-desync-split-seqovl-pattern",required_argument,0,0 },// optidx=27
+		{"dpi-desync-ipfrag-pos-tcp",required_argument,0,0},// optidx=28
+		{"dpi-desync-ipfrag-pos-udp",required_argument,0,0},// optidx=29
+		{"dpi-desync-badseq-increment",required_argument,0,0},// optidx=30
+		{"dpi-desync-badack-increment",required_argument,0,0},// optidx=31
+		{"dpi-desync-any-protocol",optional_argument,0,0},// optidx=32
+		{"dpi-desync-fake-http",required_argument,0,0},// optidx=33
+		{"dpi-desync-fake-tls",required_argument,0,0},// optidx=34
+		{"dpi-desync-fake-unknown",required_argument,0,0},// optidx=35
+		{"dpi-desync-fake-syndata",required_argument,0,0},// optidx=36
+		{"dpi-desync-fake-quic",required_argument,0,0},// optidx=37
+		{"dpi-desync-fake-wireguard",required_argument,0,0},// optidx=38
+		{"dpi-desync-fake-dht",required_argument,0,0},// optidx=39
+		{"dpi-desync-fake-unknown-udp",required_argument,0,0},// optidx=40
+		{"dpi-desync-udplen-increment",required_argument,0,0},// optidx=41
+		{"dpi-desync-udplen-pattern",required_argument,0,0},// optidx=42
+		{"dpi-desync-cutoff",required_argument,0,0},// optidx=43
+		{"dpi-desync-start",required_argument,0,0},// optidx=43
+		{"hostlist",required_argument,0,0},		// optidx=44
+		{"hostlist-exclude",required_argument,0,0},	// optidx=45
+		{"hostlist-auto",required_argument,0,0},	// optidx=46
+		{"hostlist-auto-fail-threshold",required_argument,0,0},	// optidx=48
+		{"hostlist-auto-fail-time",required_argument,0,0},	// optidx=49
+		{"hostlist-auto-retrans-threshold",required_argument,0,0},	// optidx=50
+		{"hostlist-auto-debug",required_argument,0,0},	// optidx=51
 	
 #ifdef __linux__
-		{"bind-fix4",no_argument,0,0},		// optidx=50
-		{"bind-fix6",no_argument,0,0},		// optidx=51
+		{"bind-fix4",no_argument,0,0},		// optidx=52
+		{"bind-fix6",no_argument,0,0},		// optidx=53
 #elif defined(__CYGWIN__)
-		{"wf-iface",required_argument,0,0},	// optidx=50
-		{"wf-l3",required_argument,0,0},	// optidx=51
-		{"wf-tcp",required_argument,0,0},	// optidx=52
-		{"wf-udp",required_argument,0,0},	// optidx=53
-		{"wf-raw",required_argument,0,0},	// optidx=54
-		{"wf-save",required_argument,0,0},	// optidx=55
-		{"ssid-filter",required_argument,0,0},	// optidx=56
+		{"wf-iface",required_argument,0,0},	// optidx=52
+		{"wf-l3",required_argument,0,0},	// optidx=53
+		{"wf-tcp",required_argument,0,0},	// optidx=54
+		{"wf-udp",required_argument,0,0},	// optidx=55
+		{"wf-raw",required_argument,0,0},	// optidx=56
+		{"wf-save",required_argument,0,0},	// optidx=57
+		{"ssid-filter",required_argument,0,0},	// optidx=58
 #endif
 		{NULL,0,NULL,0}
 	};
@@ -1297,7 +1301,22 @@ int main(int argc, char **argv)
 				exit_clean(1);
 			}
 			break;
-		case 26: /* dpi-desync-ipfrag-pos-tcp */
+		case 26: /* dpi-desync-split-seqovl */
+			if (sscanf(optarg,"%u",&params.desync_seqovl)<1)
+			{
+				fprintf(stderr, "dpi-desync-split-seqovl is not valid\n");
+				exit_clean(1);
+			}
+			break;
+		case 27: /* dpi-desync-split-seqovl-pattern */
+			{
+				char buf[sizeof(params.seqovl_pattern)];
+				size_t sz=sizeof(buf);
+				load_file_or_exit(optarg,buf,&sz);
+				fill_pattern(params.seqovl_pattern,sizeof(params.seqovl_pattern),buf,sz);
+			}
+			break;
+		case 28: /* dpi-desync-ipfrag-pos-tcp */
 			if (sscanf(optarg,"%u",&params.desync_ipfrag_pos_tcp)<1 || params.desync_ipfrag_pos_tcp<1 || params.desync_ipfrag_pos_tcp>DPI_DESYNC_MAX_FAKE_LEN)
 			{
 				fprintf(stderr, "dpi-desync-ipfrag-pos-tcp must be within 1..%u range\n",DPI_DESYNC_MAX_FAKE_LEN);
@@ -1309,7 +1328,7 @@ int main(int argc, char **argv)
 				exit_clean(1);
 			}
 			break;
-		case 27: /* dpi-desync-ipfrag-pos-udp */
+		case 29: /* dpi-desync-ipfrag-pos-udp */
 			if (sscanf(optarg,"%u",&params.desync_ipfrag_pos_udp)<1 || params.desync_ipfrag_pos_udp<1 || params.desync_ipfrag_pos_udp>DPI_DESYNC_MAX_FAKE_LEN)
 			{
 				fprintf(stderr, "dpi-desync-ipfrag-pos-udp must be within 1..%u range\n",DPI_DESYNC_MAX_FAKE_LEN);
@@ -1321,63 +1340,63 @@ int main(int argc, char **argv)
 				exit_clean(1);
 			}
 			break;
-		case 28: /* dpi-desync-badseq-increments */
+		case 30: /* dpi-desync-badseq-increments */
 			if (!parse_badseq_increment(optarg,&params.desync_badseq_increment))
 			{
 				fprintf(stderr, "dpi-desync-badseq-increment should be signed decimal or signed 0xHEX\n");
 				exit_clean(1);
 			}
 			break;
-		case 29: /* dpi-desync-badack-increment */
+		case 31: /* dpi-desync-badack-increment */
 			if (!parse_badseq_increment(optarg,&params.desync_badseq_ack_increment))
 			{
 				fprintf(stderr, "dpi-desync-badack-increment should be signed decimal or signed 0xHEX\n");
 				exit_clean(1);
 			}
 			break;
-		case 30: /* dpi-desync-any-protocol */
+		case 32: /* dpi-desync-any-protocol */
 			params.desync_any_proto = !optarg || atoi(optarg);
 			break;
-		case 31: /* dpi-desync-fake-http */
+		case 33: /* dpi-desync-fake-http */
 			params.fake_http_size = sizeof(params.fake_http);
 			load_file_or_exit(optarg,params.fake_http,&params.fake_http_size);
 			break;
-		case 32: /* dpi-desync-fake-tls */
+		case 34: /* dpi-desync-fake-tls */
 			params.fake_tls_size = sizeof(params.fake_tls);
 			load_file_or_exit(optarg,params.fake_tls,&params.fake_tls_size);
 			break;
-		case 33: /* dpi-desync-fake-unknown */
+		case 35: /* dpi-desync-fake-unknown */
 			params.fake_unknown_size = sizeof(params.fake_unknown);
 			load_file_or_exit(optarg,params.fake_unknown,&params.fake_unknown_size);
 			break;
-		case 34: /* dpi-desync-fake-syndata */
+		case 36: /* dpi-desync-fake-syndata */
 			params.fake_syndata_size = sizeof(params.fake_syndata);
 			load_file_or_exit(optarg,params.fake_syndata,&params.fake_syndata_size);
 			break;
-		case 35: /* dpi-desync-fake-quic */
+		case 37: /* dpi-desync-fake-quic */
 			params.fake_quic_size = sizeof(params.fake_quic);
 			load_file_or_exit(optarg,params.fake_quic,&params.fake_quic_size);
 			break;
-		case 36: /* dpi-desync-fake-wireguard */
+		case 38: /* dpi-desync-fake-wireguard */
 			params.fake_wg_size = sizeof(params.fake_wg);
 			load_file_or_exit(optarg,params.fake_wg,&params.fake_wg_size);
 			break;
-		case 37: /* dpi-desync-fake-dht */
+		case 39: /* dpi-desync-fake-dht */
 			params.fake_dht_size = sizeof(params.fake_dht);
 			load_file_or_exit(optarg,params.fake_dht,&params.fake_dht_size);
 			break;
-		case 38: /* dpi-desync-fake-unknown-udp */
+		case 40: /* dpi-desync-fake-unknown-udp */
 			params.fake_unknown_udp_size = sizeof(params.fake_unknown_udp);
 			load_file_or_exit(optarg,params.fake_unknown_udp,&params.fake_unknown_udp_size);
 			break;
-		case 39: /* dpi-desync-udplen-increment */
+		case 41: /* dpi-desync-udplen-increment */
 			if (sscanf(optarg,"%d",&params.udplen_increment)<1 || params.udplen_increment>0x7FFF || params.udplen_increment<-0x8000)
 			{
 				fprintf(stderr, "dpi-desync-udplen-increment must be integer within -32768..32767 range\n");
 				exit_clean(1);
 			}
 			break;
-		case 40: /* dpi-desync-udplen-pattern */
+		case 42: /* dpi-desync-udplen-pattern */
 			{
 				char buf[sizeof(params.udplen_pattern)];
 				size_t sz=sizeof(buf);
@@ -1385,35 +1404,35 @@ int main(int argc, char **argv)
 				fill_pattern(params.udplen_pattern,sizeof(params.udplen_pattern),buf,sz);
 			}
 			break;
-		case 41: /* desync-cutoff */
+		case 43: /* desync-cutoff */
 			if (!parse_cutoff(optarg, &params.desync_cutoff, &params.desync_cutoff_mode))
 			{
 				fprintf(stderr, "invalid desync-cutoff value\n");
 				exit_clean(1);
 			}
 			break;
-		case 42: /* desync-start */
+		case 44: /* desync-start */
 			if (!parse_cutoff(optarg, &params.desync_start, &params.desync_start_mode))
 			{
 				fprintf(stderr, "invalid desync-start value\n");
 				exit_clean(1);
 			}
 			break;
-		case 43: /* hostlist */
+		case 45: /* hostlist */
 			if (!strlist_add(&params.hostlist_files, optarg))
 			{
 				fprintf(stderr, "strlist_add failed\n");
 				exit_clean(1);
 			}
 			break;
-		case 44: /* hostlist-exclude */
+		case 46: /* hostlist-exclude */
 			if (!strlist_add(&params.hostlist_exclude_files, optarg))
 			{
 				fprintf(stderr, "strlist_add failed\n");
 				exit_clean(1);
 			}
 			break;
-		case 45: /* hostlist-auto */
+		case 47: /* hostlist-auto */
 			if (*params.hostlist_auto_filename)
 			{
 				fprintf(stderr, "only one auto hostlist is supported\n");
@@ -1446,7 +1465,7 @@ int main(int argc, char **argv)
 			strncpy(params.hostlist_auto_filename, optarg, sizeof(params.hostlist_auto_filename));
 			params.hostlist_auto_filename[sizeof(params.hostlist_auto_filename) - 1] = '\0';
 			break;
-		case 46: /* hostlist-auto-fail-threshold */
+		case 48: /* hostlist-auto-fail-threshold */
 			params.hostlist_auto_fail_threshold = (uint8_t)atoi(optarg);
 			if (params.hostlist_auto_fail_threshold<1 || params.hostlist_auto_fail_threshold>20)
 			{
@@ -1454,7 +1473,7 @@ int main(int argc, char **argv)
 				exit_clean(1);
 			}
 			break;
-		case 47: /* hostlist-auto-fail-time */
+		case 49: /* hostlist-auto-fail-time */
 			params.hostlist_auto_fail_time = (uint8_t)atoi(optarg);
 			if (params.hostlist_auto_fail_time<1)
 			{
@@ -1462,7 +1481,7 @@ int main(int argc, char **argv)
 				exit_clean(1);
 			}
 			break;
-		case 48: /* hostlist-auto-retrans-threshold */
+		case 50: /* hostlist-auto-retrans-threshold */
 			params.hostlist_auto_retrans_threshold = (uint8_t)atoi(optarg);
 			if (params.hostlist_auto_retrans_threshold<2 || params.hostlist_auto_retrans_threshold>10)
 			{
@@ -1470,7 +1489,7 @@ int main(int argc, char **argv)
 				exit_clean(1);
 			}
 			break;
-		case 49: /* hostlist-auto-debug */
+		case 51: /* hostlist-auto-debug */
 			{
 				FILE *F = fopen(optarg,"a+t");
 				if (!F)
@@ -1488,28 +1507,28 @@ int main(int argc, char **argv)
 			}
 			break;
 #ifdef __linux__
-		case 50: /* bind-fix4 */
+		case 52: /* bind-fix4 */
 			params.bind_fix4 = true;
 			break;
-		case 51: /* bind-fix6 */
+		case 53: /* bind-fix6 */
 			params.bind_fix6 = true;
 			break;
 #elif defined(__CYGWIN__)
-		case 50: /* wf-iface */
+		case 52: /* wf-iface */
 			if (!sscanf(optarg,"%u.%u",&IfIdx,&SubIfIdx))
 			{
 				fprintf(stderr, "bad value for --wf-iface\n");
 				exit_clean(1);
 			}
 			break;
-		case 51: /* wf-l3 */
+		case 53: /* wf-l3 */
 			if (!wf_make_l3(optarg,&wf_ipv4,&wf_ipv6))
 			{
 				fprintf(stderr, "bad value for --wf-l3\n");
 				exit_clean(1);
 			}
 			break;
-		case 52: /* wf-tcp */
+		case 54: /* wf-tcp */
 			hash_wf_tcp=hash_jen(optarg,strlen(optarg));
 			if (!wf_make_pf(optarg,"tcp","SrcPort",wf_pf_tcp_src,sizeof(wf_pf_tcp_src)) ||
 				!wf_make_pf(optarg,"tcp","DstPort",wf_pf_tcp_dst,sizeof(wf_pf_tcp_dst)))
@@ -1518,7 +1537,7 @@ int main(int argc, char **argv)
 				exit_clean(1);
 			}
 			break;
-		case 53: /* wf-udp */
+		case 55: /* wf-udp */
 			hash_wf_udp=hash_jen(optarg,strlen(optarg));
 			if (!wf_make_pf(optarg,"udp","SrcPort",wf_pf_udp_src,sizeof(wf_pf_udp_src)) ||
 				!wf_make_pf(optarg,"udp","DstPort",wf_pf_udp_dst,sizeof(wf_pf_udp_dst)))
@@ -1527,7 +1546,7 @@ int main(int argc, char **argv)
 				exit_clean(1);
 			}
 			break;
-		case 54: /* wf-raw */
+		case 56: /* wf-raw */
 			hash_wf_raw=hash_jen(optarg,strlen(optarg));
 			if (optarg[0]=='@')
 			{
@@ -1541,11 +1560,11 @@ int main(int argc, char **argv)
 				windivert_filter[sizeof(windivert_filter) - 1] = '\0';
 			}
 			break;
-		case 55: /* wf-save */
+		case 57: /* wf-save */
 			strncpy(wf_save_file, optarg, sizeof(wf_save_file));
 			wf_save_file[sizeof(wf_save_file) - 1] = '\0';
 			break;
-		case 56: /* ssid-filter */
+		case 58: /* ssid-filter */
 			hash_ssid_filter=hash_jen(optarg,strlen(optarg));
 			{
 				char *e,*p = optarg;
@@ -1617,7 +1636,7 @@ int main(int argc, char **argv)
 		if (hMutexArg && GetLastError()==ERROR_ALREADY_EXISTS)
 		{
 			CloseHandle(hMutexArg);	hMutexArg = NULL;
-			printf("A copy of winws is already running with the same filter\n");
+			fprintf(stderr, "A copy of winws is already running with the same filter\n");
 			goto exiterr;
 		}
 		
diff --git a/nfq/params.h b/nfq/params.h
index 9098c34..7404473 100644
--- a/nfq/params.h
+++ b/nfq/params.h
@@ -50,7 +50,7 @@ struct params_s
 	char hostspell[4];
 	enum dpi_desync_mode desync_mode0,desync_mode,desync_mode2;
 	bool desync_retrans,desync_skip_nosni,desync_any_proto;
-	unsigned int desync_repeats,desync_split_pos,desync_ipfrag_pos_tcp,desync_ipfrag_pos_udp;
+	unsigned int desync_repeats,desync_split_pos,desync_seqovl,desync_ipfrag_pos_tcp,desync_ipfrag_pos_udp;
 	enum httpreqpos desync_split_http_req;
 	enum tlspos desync_split_tls;
 	char desync_start_mode, desync_cutoff_mode; // n - packets, d - data packets, s - relative sequence
@@ -60,7 +60,7 @@ struct params_s
 	uint32_t desync_fooling_mode;
 	uint32_t desync_fwmark; // unused in BSD
 	uint32_t desync_badseq_increment, desync_badseq_ack_increment;
-	uint8_t fake_http[1460],fake_tls[1460],fake_unknown[1460],fake_syndata[1460];
+	uint8_t fake_http[1460],fake_tls[1460],fake_unknown[1460],fake_syndata[1460],seqovl_pattern[1460];
 	uint8_t fake_unknown_udp[1472],udplen_pattern[1472],fake_quic[1472],fake_wg[1472],fake_dht[1472];
 	size_t fake_http_size,fake_tls_size,fake_quic_size,fake_wg_size,fake_dht_size,fake_unknown_size,fake_syndata_size,fake_unknown_udp_size;
 	int udplen_increment;