diff --git a/doc/changelog.txt b/doc/changelog.txt
index 2faa884..1f1f6a0 100644
--- a/doc/changelog.txt
+++ b/doc/changelog.txt
@@ -1,6 +1,8 @@
 
 HEAD
 ====
+Changes:
+- remove support for Linux 2.6.17
 
 
 v1.47.1 (2010-10-15)
diff --git a/extensions/compat_xtables.c b/extensions/compat_xtables.c
index e3b3b37..00b3e41 100644
--- a/extensions/compat_xtables.c
+++ b/extensions/compat_xtables.c
@@ -463,10 +463,7 @@ EXPORT_SYMBOL_GPL(xtnu_request_find_match);
 
 int xtnu_ip_route_me_harder(struct sk_buff **pskb, unsigned int addr_type)
 {
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 17)
-	/* Actually this one is valid up to 2.6.18.4, but changed in 2.6.18.5 */
-	return ip_route_me_harder(pskb);
-#elif LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 23)
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 23)
 	return ip_route_me_harder(pskb, addr_type);
 #else
 	return ip_route_me_harder(*pskb, addr_type);
@@ -595,14 +592,6 @@ void xtnu_csum_replace2(__sum16 *sum, __be16 from, __be16 to)
 EXPORT_SYMBOL_GPL(xtnu_csum_replace2);
 #endif
 
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 17)
-int xtnu_skb_linearize(struct sk_buff *skb)
-{
-	return skb_linearize(skb, GFP_ATOMIC);
-}
-EXPORT_SYMBOL_GPL(xtnu_skb_linearize);
-#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 a1caa51..45a9a02 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, 17)
-#	warning Kernels below 2.6.17 not supported.
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18)
+#	warning Kernels below 2.6.18 not supported.
 #endif
 
 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
@@ -29,11 +29,6 @@
 #	warning You need either CONFIG_NF_CONNTRACK or CONFIG_IP_NF_CONNTRACK.
 #endif
 
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 17)
-#	define skb_init_secmark(skb)
-#	define skb_linearize	xtnu_skb_linearize
-#endif
-
 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 19)
 #	define neigh_hh_output xtnu_neigh_hh_output
 #	define IPPROTO_UDPLITE 136
diff --git a/extensions/compat_xtnu.h b/extensions/compat_xtnu.h
index 35819b0..98e8eaf 100644
--- a/extensions/compat_xtnu.h
+++ b/extensions/compat_xtnu.h
@@ -161,7 +161,6 @@ extern void xtnu_csum_replace2(__u16 __bitwise *, __be16, __be16);
 extern void xtnu_csum_replace4(__u16 __bitwise *, __be32, __be32);
 extern void xtnu_proto_csum_replace4(__u16 __bitwise *, struct sk_buff *,
 	__be32, __be32, bool);
-extern int xtnu_skb_linearize(struct sk_buff *);
 extern int xtnu_ipv6_skip_exthdr(const struct sk_buff *, int,
 	uint8_t *, __be16 *);
 extern int xtnu_ipv6_find_hdr(const struct sk_buff *, unsigned int *,
diff --git a/extensions/xt_TARPIT.c b/extensions/xt_TARPIT.c
index 0e66279..b5e88d8 100644
--- a/extensions/xt_TARPIT.c
+++ b/extensions/xt_TARPIT.c
@@ -208,13 +208,9 @@ static void tarpit_tcp4(struct sk_buff *oldskb, unsigned int hook,
 	nf_reset(nskb);
 	skb_nfmark(nskb) = 0;
 	skb_init_secmark(nskb);
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18)
 	skb_shinfo(nskb)->gso_size = 0;
 	skb_shinfo(nskb)->gso_segs = 0;
 	skb_shinfo(nskb)->gso_type = 0;
-#endif
-
 	oldhdr = ip_hdr(oldskb);
 	tcph = (struct tcphdr *)(skb_network_header(nskb) + ip_hdrlen(nskb));
 
@@ -359,13 +355,9 @@ static void tarpit_tcp6(struct sk_buff *oldskb, unsigned int hook,
 	nf_reset(nskb);
 	skb_nfmark(nskb) = 0;
 	skb_init_secmark(nskb);
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18)
 	skb_shinfo(nskb)->gso_size = 0;
 	skb_shinfo(nskb)->gso_segs = 0;
 	skb_shinfo(nskb)->gso_type = 0;
-#endif
-
 	skb_put(nskb, sizeof(struct ipv6hdr));
 	ip6h = ipv6_hdr(nskb);
 	*(__be32 *)ip6h =  htonl(0x60000000 | (tclass << 20));