diff --git a/net-firewall/ipt_netflow/Manifest b/net-firewall/ipt_netflow/Manifest
index 592cc29..a779559 100644
--- a/net-firewall/ipt_netflow/Manifest
+++ b/net-firewall/ipt_netflow/Manifest
@@ -1,2 +1,2 @@
-DIST ipt_netflow-2.4.tar.gz 92580 BLAKE2B 0197e7e5cdd9c94c7b80b38cb4e2879343139592421922bf73aeaac70ac3af54ea25934bb1474ff455a9f58eab2368995591542f46be48b5c8491a3b6a192f56 SHA512 3c80d02cfda996fbde8d258875df8795000fd8390b5a6f8296771a992067e153eca48f7f4602421529948beaf3030e164adfc2ffe5b528042fbdc15ffb56aa74
 DIST ipt_netflow-2.5.1.tar.gz 94627 BLAKE2B 440daed1f0c02e4700c6d4a97da08abc7bf51c73cd824a67fd2b7b9394b47d493ca7acfea34467d93cdce6dded2c5b24b4a2600b9f717aa54561d1f88a123dbc SHA512 dd0bde358f788f2d62ace6a0b1529128f0a686f9b776deeae3502d45d06d13971e8ea249d2647d00b00e73625c515bc12a4b7bd8d34fafd5f3b32f290d48cdce
+DIST ipt_netflow-2.6.tar.gz 95752 BLAKE2B 088c7030addd34d9d889cfa705aa060d0793e33be957deb3b703daea4229afc24f7268285ce336e425a024dc9d8139633a5206ff9d769c95cf71c156acbd4f25 SHA512 0ccea556e25dc6bc2d8c7648ed1b4ab366097baf5b06f167ccd19d2adb0a195ad652635181573785f9e9fa208d163f22b6527310eb939455d7ee3bc141cbeed5
diff --git a/net-firewall/ipt_netflow/files/ipt_netflow-2.4-bridge_netfilter.patch b/net-firewall/ipt_netflow/files/ipt_netflow-2.4-bridge_netfilter.patch
deleted file mode 100644
index cde23bc..0000000
--- a/net-firewall/ipt_netflow/files/ipt_netflow-2.4-bridge_netfilter.patch
+++ /dev/null
@@ -1,61 +0,0 @@
-From 9288e30f493d252ee85b492a894f78073e4f6d41 Mon Sep 17 00:00:00 2001
-From: ABC <abc@openwall.com>
-Date: Sat, 28 Sep 2019 23:29:40 +0300
-Subject: [PATCH] Don't compile physdev-override if BRIDGE_NETFILTER is
- disabled.
-
-Fixes #120 "Compile error nf_bridge / nf_trace" reported by DocMAX.
-
-Fixes: 51bdc2b ("Use nf_bridge_info_get() instead of skb->nf_bridge").
----
- compat.h      | 2 ++
- configure     | 1 +
- ipt_NETFLOW.c | 5 +++++
- 3 files changed, 8 insertions(+)
-
-diff --git a/compat.h b/compat.h
-index 0f9896b..66e224b 100644
---- a/compat.h
-+++ b/compat.h
-@@ -680,11 +680,13 @@ static inline int is_vlan_dev(struct net_device *dev)
- #endif
- 
- #if LINUX_VERSION_CODE < KERNEL_VERSION(5,0,0)
-+# ifdef CONFIG_BRIDGE_NETFILTER
- static inline struct nf_bridge_info *
- nf_bridge_info_get(const struct sk_buff *skb)
- {
- 	return skb->nf_bridge;
- }
-+# endif
- #endif
- 
- #if LINUX_VERSION_CODE >= KERNEL_VERSION(5,0,0)
-diff --git a/configure b/configure
-index 74eece5..8aae8bf 100755
---- a/configure
-+++ b/configure
-@@ -470,6 +470,7 @@ kernel_check_config() {
-   kconfig CONFIG_NF_CONNTRACK_EVENTS	"natevents"
-   kconfig CONFIG_IPV6			"IPv6"
-   kconfig CONFIG_IP6_NF_IPTABLES	"ip6tables target"
-+  kconfig CONFIG_BRIDGE_NETFILTER	"physdev override"
- }
- 
- kernel_check_include() {
-diff --git a/ipt_NETFLOW.c b/ipt_NETFLOW.c
-index fe25655..064de6c 100644
---- a/ipt_NETFLOW.c
-+++ b/ipt_NETFLOW.c
-@@ -83,6 +83,11 @@
- #if defined(CONFIG_NF_NAT_NEEDED) && LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39)
- # include <net/netfilter/nf_conntrack_timestamp.h>
- #endif
-+#ifdef ENABLE_PHYSDEV_OVER
-+# ifndef CONFIG_BRIDGE_NETFILTER
-+#  undef ENABLE_PHYSDEV_OVER
-+# endif
-+#endif
- 
- #define IPT_NETFLOW_VERSION "2.4"   /* Note that if you are using git, you
- 				       will see version in other format. */
diff --git a/net-firewall/ipt_netflow/files/ipt_netflow-2.5.1-vlan_dev_priv.patch b/net-firewall/ipt_netflow/files/ipt_netflow-2.5.1-vlan_dev_priv.patch
deleted file mode 100644
index 49721e5..0000000
--- a/net-firewall/ipt_netflow/files/ipt_netflow-2.5.1-vlan_dev_priv.patch
+++ /dev/null
@@ -1,32 +0,0 @@
-commit 1153f73f038205dc17303e6e6c455bbbb56191f7
-Author: ABC <abc@openwall.com>
-Date:   Wed Oct 14 15:35:57 2020 +0300
-
-    gen_compat_def: Check for vlan_dev_priv instead of version if
-
-diff --git a/gen_compat_def b/gen_compat_def
-index c0f20f6..3965e94 100755
---- a/gen_compat_def
-+++ b/gen_compat_def
-@@ -85,6 +85,8 @@ kbuild_test_struct proc_ops linux/proc_fs.h
- kbuild_test_struct proc_ops linux/proc_fs.h
- # No since v5.1, but present in CentOS-8's 4.18.0-227
- kbuild_test_symbol synchronize_sched linux/rcupdate.h
-+# Stumbled on 5.9
-+kbuild_test_struct vlan_dev_priv linux/if_vlan.h
- 
- echo "// End of compat_def.h"
- 
-diff --git a/ipt_NETFLOW.c b/ipt_NETFLOW.c
-index 01055df..6f95166 100644
---- a/ipt_NETFLOW.c
-+++ b/ipt_NETFLOW.c
-@@ -4874,7 +4874,7 @@ static void parse_l2_header(const struct sk_buff *skb, struct ipt_netflow_tuple
- 		tuple->tag[tag_num++] = htons(vlan_tx_tag_get(skb));
- 	else if (skb->dev && is_vlan_dev(skb->dev)) {
- 		struct net_device *vlan_dev = skb->dev;
--# if LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,0)
-+# ifdef HAVE_VLAN_DEV_PRIV
- 		struct vlan_dev_priv *vlan = vlan_dev_priv(vlan_dev);
- 
- 		/* `if` condition is `#if`ed intentionally, and this is
diff --git a/net-firewall/ipt_netflow/files/ipt_netflow-2.3-flags.patch b/net-firewall/ipt_netflow/files/ipt_netflow-2.6-gentoo.patch
similarity index 62%
rename from net-firewall/ipt_netflow/files/ipt_netflow-2.3-flags.patch
rename to net-firewall/ipt_netflow/files/ipt_netflow-2.6-gentoo.patch
index 0d89e5b..44dcfde 100644
--- a/net-firewall/ipt_netflow/files/ipt_netflow-2.3-flags.patch
+++ b/net-firewall/ipt_netflow/files/ipt_netflow-2.6-gentoo.patch
@@ -1,21 +1,23 @@
---- a/Makefile.in
-+++ b/Makefile.in
-@@ -11,7 +11,7 @@
+--- a/Makefile.in	2021-05-27 12:57:29.600377496 +0300
++++ b/Makefile.in	2021-05-27 12:58:55.111381725 +0300
+@@ -13,7 +13,7 @@
  SNMPTGSO = /usr/lib/snmp/dlmod/snmp_NETFLOW.so
  SNMPCONF = /etc/snmp/snmpd.conf
  SNMPLINE = dlmod netflow $(SNMPTGSO)
 -CC = gcc
-+$(CC) ?= gcc
++CC ?= gcc
  
  # https://www.kernel.org/doc/Documentation/kbuild/modules.txt
  # https://www.kernel.org/doc/Documentation/kbuild/makefiles.txt
-@@ -22,29 +22,29 @@
+@@ -24,31 +24,31 @@
  
- ipt_NETFLOW.ko: version.h ipt_NETFLOW.c ipt_NETFLOW.h compat.h Makefile
- 	@echo Compiling for kernel $(KVERSION)
--	make -C $(KDIR) M=$(CURDIR) modules CONFIG_DEBUG_INFO=y
-+	$(MAKE) -C $(KDIR) M=$(CURDIR) modules CONFIG_DEBUG_INFO=y
+ ipt_NETFLOW.ko: version.h ipt_NETFLOW.c ipt_NETFLOW.h compat_def.h compat.h Makefile
+ 	@echo Compiling $(shell ./version.sh) for kernel $(KVERSION)
+-	make -C $(KDIR) M=$(CURDIR) modules
++	$(MAKE) -C $(KDIR) M=$(CURDIR) modules
  	@touch $@
+ compat_def.h: gen_compat_def
+ 	./gen_compat_def > $@
  sparse: | version.h ipt_NETFLOW.c ipt_NETFLOW.h compat.h Makefile
  	@rm -f ipt_NETFLOW.ko ipt_NETFLOW.o
  	@echo Compiling for kernel $(KVERSION)
@@ -36,7 +38,7 @@
  lclean:
  	-rm -f *.so *_sh.o
  clean: mclean lclean
- 	-rm -f *.so *.o modules.order version.h
+ 	-rm -f *.so *.o modules.order version.h compat_def.h
  
  snmp_NETFLOW.so: snmp_NETFLOW.c
 -	$(CC) -fPIC -shared -o $@ $< -lnetsnmp
@@ -44,12 +46,16 @@
  
  sinstall: | snmp_NETFLOW.so IPT-NETFLOW-MIB.my
  	@echo " *"
-@@ -64,7 +64,7 @@
+@@ -68,10 +68,10 @@
  	fi
  
  %_sh.o: libipt_NETFLOW.c
 -	$(CC) $(CFLAGS) -O2 -Wall -Wunused $(IPTABLES_CFLAGS) -fPIC -o $@ -c libipt_NETFLOW.c
-+	$(CC) $(CFLAGS) $(LDFLAGS) -Wall -Wunused $(IPTABLES_CFLAGS) -fPIC -o $@ -c libipt_NETFLOW.c
++	$(CC) $(CFLAGS) -Wall -Wunused $(IPTABLES_CFLAGS) -fPIC -o $@ -c libipt_NETFLOW.c
  
  %.so: %_sh.o
- 	$(CC) -shared -o $@ $<
+-	$(CC) -shared -o $@ $<
++	$(CC) $(LDFLAGS) -shared -o $@ $<
+ 
+ version.h: ipt_NETFLOW.c ipt_NETFLOW.h compat.h Makefile
+ 	@./version.sh --define > version.h
diff --git a/net-firewall/ipt_netflow/files/ipt_netflow-2.6-ref_module_fix.patch b/net-firewall/ipt_netflow/files/ipt_netflow-2.6-ref_module_fix.patch
new file mode 100644
index 0000000..21d6471
--- /dev/null
+++ b/net-firewall/ipt_netflow/files/ipt_netflow-2.6-ref_module_fix.patch
@@ -0,0 +1,60 @@
+commit 352cdb28eecbb57de3509b18dfc37dcce0455c01
+Author: ABC <abc@openwall.com>
+Date:   Tue Jun 22 19:07:02 2021 +0300
+
+    Fix compile for stable kernels by not using 'ref_module'
+    
+    `ref_module' unexport in 7ef5264de7732 ("modules: mark ref_module
+    static") is back-ported into stable kernels making old `#if
+    LINUX_VERSION_CODE' checks irrelevant or too complicated to update.
+    
+    Do not use `ref_module' API at all since `try_module_get' is ancient
+    enough to use always.
+    
+    Reported-by: https://github.com/xtaran
+    Fixes: https://github.com/aabc/ipt-netflow/issues/177
+
+diff --git a/compat.h b/compat.h
+index 99edf91..30f1d8f 100644
+--- a/compat.h
++++ b/compat.h
+@@ -170,10 +170,6 @@ static int __ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cm
+ # define CHECK_OK	0
+ #endif
+ 
+-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)
+-# define use_module	ref_module
+-#endif
+-
+ #ifndef NF_IP_LOCAL_IN /* 2.6.25 */
+ # define NF_IP_PRE_ROUTING	NF_INET_PRE_ROUTING
+ # define NF_IP_LOCAL_IN		NF_INET_LOCAL_IN
+diff --git a/ipt_NETFLOW.c b/ipt_NETFLOW.c
+index d3d3901..c4c049d 100644
+--- a/ipt_NETFLOW.c
++++ b/ipt_NETFLOW.c
+@@ -5494,12 +5494,8 @@ static void register_ct_events(void)
+ 	}
+ 	/* Reference netlink module to prevent it's unsafe unload before us. */
+ 	if (!netlink_m && (netlink_m = find_module(NETLINK_M))) {
+-#if LINUX_VERSION_CODE < KERNEL_VERSION(5,9,0)
+-		use_module(THIS_MODULE, netlink_m);
+-#else
+ 		if (!try_module_get(netlink_m))
+ 			netlink_m = NULL;
+-#endif
+ 	}
+ 
+ 	/* Register ct events callback. */
+@@ -5527,10 +5523,9 @@ static void unregister_ct_events(void)
+ #else /* < v3.2 */
+ 	unset_notifier_cb();
+ #endif /* v3.2 */
+-#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,9,0)
+ 	module_put(netlink_m);
+ 	netlink_m = NULL;
+-#endif
++
+ 	rcu_assign_pointer(saved_event_cb, NULL);
+ #else /* < v2.6.31 */
+ 	nf_conntrack_unregister_notifier(&ctnl_notifier);
diff --git a/net-firewall/ipt_netflow/ipt_netflow-2.4-r1.ebuild b/net-firewall/ipt_netflow/ipt_netflow-2.6.ebuild
similarity index 84%
rename from net-firewall/ipt_netflow/ipt_netflow-2.4-r1.ebuild
rename to net-firewall/ipt_netflow/ipt_netflow-2.6.ebuild
index d167b5e..29b10a9 100644
--- a/net-firewall/ipt_netflow/ipt_netflow-2.4-r1.ebuild
+++ b/net-firewall/ipt_netflow/ipt_netflow-2.6.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -15,7 +15,7 @@ LICENSE="GPL-2"
 SLOT="0"
 KEYWORDS="amd64 x86"
 
-IUSE="debug dot1q natevents snmp"
+IUSE="debug dot1d dot1q natevents snmp"
 
 RDEPEND="
 	net-firewall/iptables:0=
@@ -27,8 +27,8 @@ DEPEND="${RDEPEND}
 "
 PATCHES=(
 	"${FILESDIR}/${PN}-2.0-configure.patch" # bug #455984
-	"${FILESDIR}/${PN}-2.3-flags.patch"
-	"${FILESDIR}/${P}-bridge_netfilter.patch"
+	"${FILESDIR}/${PN}-2.6-gentoo.patch"
+	"${FILESDIR}/${P}-ref_module_fix.patch" # bug #781014
 )
 
 pkg_setup() {
@@ -36,6 +36,7 @@ pkg_setup() {
 
 	local CONFIG_CHECK="~IP_NF_IPTABLES"
 	use debug && CONFIG_CHECK+=" ~DEBUG_FS"
+	use dot1d && CONFIG_CHECK+=" BRIDGE_NETFILTER"
 	use dot1q && CONFIG_CHECK+=" VLAN_8021Q"
 	if use natevents; then
 		CONFIG_CHECK+=" NF_CONNTRACK_EVENTS"
@@ -87,21 +88,24 @@ src_configure() {
 		--kdir="${KV_DIR}" \
 		--kver="${KV_FULL}" \
 		$(use debug && echo '--enable-debugfs') \
+		$(use dot1d && echo '--enable-physdev-override') \
 		$(use dot1q && echo '--enable-vlan') \
 		$(use natevents && echo '--enable-natevents') \
 		$(use snmp && echo '--enable-snmp-rules' || echo '--disable-snmp-agent')
 }
 
 src_compile() {
-	emake ARCH="$(tc-arch-kernel)" CC="$(tc-getCC)" all
+	emake ARCH="$(tc-arch-kernel)" CC="$(tc-getCC)" LD="$(tc-getLD)" OBJDUMP="$(tc-getOBJDUMP)" all
 }
 
 src_install() {
 	linux-mod_src_install
-	exeinto "${IPT_LIB}"
-	doexe libipt_NETFLOW.so
-	doexe libip6t_NETFLOW.so
+
 	use snmp && emake DESTDIR="${D}" SNMPTGSO="/usr/$(get_libdir)/snmp/dlmod/snmp_NETFLOW.so" sinstall
+
+	exeinto "${IPT_LIB}"
+	doexe libip{,6}t_NETFLOW.so
+
 	doheader ipt_NETFLOW.h
 	dodoc README*
 }