diff --git a/doc/changelog.txt b/doc/changelog.txt
index 1c52c45..547bddd 100644
--- a/doc/changelog.txt
+++ b/doc/changelog.txt
@@ -2,7 +2,7 @@
 HEAD
 ====
 Changes:
-- remove support for Linux 2.6.17--2.6.23
+- remove support for Linux 2.6.17--2.6.24
 
 
 v1.47.1 (2010-10-15)
diff --git a/extensions/compat_xtables.c b/extensions/compat_xtables.c
index c1f4d83..0177d62 100644
--- a/extensions/compat_xtables.c
+++ b/extensions/compat_xtables.c
@@ -425,57 +425,6 @@ int xtnu_skb_make_writable(struct sk_buff **pskb, unsigned int len)
 }
 EXPORT_SYMBOL_GPL(xtnu_skb_make_writable);
 
-#if LINUX_VERSION_CODE == KERNEL_VERSION(2, 6, 24)
-static int __xtnu_ip_local_out(struct sk_buff *skb)
-{
-	struct iphdr *iph = ip_hdr(skb);
-
-	iph->tot_len = htons(skb->len);
-	ip_send_check(iph);
-	return nf_hook(PF_INET, NF_IP_LOCAL_OUT, skb, NULL,
-	               skb->dst->dev, dst_output);
-}
-
-int xtnu_ip_local_out(struct sk_buff *skb)
-{
-	int err;
-
-	err = __xtnu_ip_local_out(skb);
-	if (likely(err == 1))
-		err = dst_output(skb);
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(xtnu_ip_local_out);
-#endif
-
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 24)
-int xtnu_ip_route_output_key(void *net, struct rtable **rp, struct flowi *flp)
-{
-	return ip_route_output_flow(rp, flp, NULL, 0);
-}
-EXPORT_SYMBOL_GPL(xtnu_ip_route_output_key);
-
-void xtnu_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb,
-    __be32 from, __be32 to, bool pseudohdr)
-{
-	__be32 diff[] = {~from, to};
-	const void *dv = diff; /* kludge for < v2.6.19-555-g72685fc */
-
-	if (skb->ip_summed != CHECKSUM_PARTIAL) {
-		*sum = csum_fold(csum_partial(dv, sizeof(diff),
-		       ~csum_unfold(*sum)));
-		if (skb->ip_summed == CHECKSUM_COMPLETE && pseudohdr)
-			skb->csum = ~csum_partial(dv, sizeof(diff),
-			            ~skb->csum);
-	} else if (pseudohdr) {
-		*sum = ~csum_fold(csum_partial(dv, sizeof(diff),
-		       csum_unfold(*sum)));
-	}
-}
-EXPORT_SYMBOL_GPL(xtnu_proto_csum_replace4);
-#endif
-
 void *HX_memmem(const void *space, size_t spacesize,
     const void *point, size_t pointsize)
 {
diff --git a/extensions/compat_xtables.h b/extensions/compat_xtables.h
index 142b0b0..676a6c8 100644
--- a/extensions/compat_xtables.h
+++ b/extensions/compat_xtables.h
@@ -8,8 +8,8 @@
 
 #define DEBUGP Use__pr_debug__instead
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 24)
-#	warning Kernels below 2.6.24 not supported.
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25)
+#	warning Kernels below 2.6.25 not supported.
 #endif
 
 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
@@ -21,17 +21,6 @@
 #	warning You need CONFIG_NF_CONNTRACK.
 #endif
 
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 24)
-#	define NF_INET_PRE_ROUTING  NF_IP_PRE_ROUTING
-#	define NF_INET_LOCAL_IN     NF_IP_LOCAL_IN
-#	define NF_INET_FORWARD      NF_IP_FORWARD
-#	define NF_INET_LOCAL_OUT    NF_IP_LOCAL_OUT
-#	define NF_INET_POST_ROUTING NF_IP_POST_ROUTING
-#	define ip_local_out         xtnu_ip_local_out
-#	define ip_route_output_key  xtnu_ip_route_output_key
-#	include "compat_nfinetaddr.h"
-#endif
-
 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 34)
 #	define xt_match              xtnu_match
 #	define xt_register_match     xtnu_register_match
@@ -40,12 +29,6 @@
 #	define xt_unregister_matches xtnu_unregister_matches
 #endif
 
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 24)
-#	define csum_replace2 nf_csum_replace2
-#	define csum_replace4 nf_csum_replace4
-#	define inet_proto_csum_replace4 xtnu_proto_csum_replace4
-#endif
-
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 34)
 #	define ipt_unregister_table(tbl) ipt_unregister_table(&init_net, (tbl))
 #	define ip6t_unregister_table(tbl) ip6t_unregister_table(&init_net, (tbl))
diff --git a/extensions/ip6table_rawpost.c b/extensions/ip6table_rawpost.c
index abc16bb..2159876 100644
--- a/extensions/ip6table_rawpost.c
+++ b/extensions/ip6table_rawpost.c
@@ -68,17 +68,10 @@ static int __init rawpost6_table_init(void)
 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 29)
 	rwlock_init(&rawpost6_itable.lock);
 #endif
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
 	rawpost6_ptable = ip6t_register_table(&init_net, &rawpost6_itable,
 	                  &rawpost6_initial.repl);
 	if (IS_ERR(rawpost6_ptable))
 		return PTR_ERR(rawpost6_ptable);
-#else
-	ret = ip6t_register_table(&rawpost6_itable, &rawpost6_initial.repl);
-	if (ret < 0)
-		return ret;
-	rawpost6_ptable = &rawpost6_itable;
-#endif
 
 	ret = nf_register_hook(&rawpost6_hook_ops);
 	if (ret < 0)
diff --git a/extensions/iptable_rawpost.c b/extensions/iptable_rawpost.c
index 50a45c4..9abea27 100644
--- a/extensions/iptable_rawpost.c
+++ b/extensions/iptable_rawpost.c
@@ -69,17 +69,10 @@ static int __init rawpost4_table_init(void)
 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 29)
 	rwlock_init(&rawpost4_itable.lock);
 #endif
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
 	rawpost4_ptable = ipt_register_table(&init_net, &rawpost4_itable,
 	                  &rawpost4_initial.repl);
 	if (IS_ERR(rawpost4_ptable))
 		return PTR_ERR(rawpost4_ptable);
-#else
-	ret = ipt_register_table(&rawpost4_itable, &rawpost4_initial.repl);
-	if (ret < 0)
-		return ret;
-	rawpost4_ptable = &rawpost4_itable;
-#endif
 
 	ret = nf_register_hook(&rawpost4_hook_ops);
 	if (ret < 0)