diff --git a/internal/services/containers/kubernetes_nodepool.go b/internal/services/containers/kubernetes_nodepool.go
index d8d78ea9dad5..c25f20d29062 100644
--- a/internal/services/containers/kubernetes_nodepool.go
+++ b/internal/services/containers/kubernetes_nodepool.go
@@ -669,7 +669,7 @@ func schemaNodePoolSysctlConfig() *pluginsdk.Schema {
 					Type:         pluginsdk.TypeInt,
 					Optional:     true,
 					ForceNew:     true,
-					ValidateFunc: validation.IntBetween(32768, 65000),
+					ValidateFunc: validation.IntBetween(32768, 65535),
 				},
 
 				"net_ipv4_neigh_default_gc_thresh1": {
@@ -704,7 +704,7 @@ func schemaNodePoolSysctlConfig() *pluginsdk.Schema {
 					Type:         pluginsdk.TypeInt,
 					Optional:     true,
 					ForceNew:     true,
-					ValidateFunc: validation.IntBetween(10, 75),
+					ValidateFunc: validation.IntBetween(10, 90),
 				},
 
 				"net_ipv4_tcp_keepalive_probes": {
@@ -745,14 +745,14 @@ func schemaNodePoolSysctlConfig() *pluginsdk.Schema {
 					Type:         pluginsdk.TypeInt,
 					Optional:     true,
 					ForceNew:     true,
-					ValidateFunc: validation.IntBetween(65536, 147456),
+					ValidateFunc: validation.IntBetween(65536, 524288),
 				},
 
 				"net_netfilter_nf_conntrack_max": {
 					Type:         pluginsdk.TypeInt,
 					Optional:     true,
 					ForceNew:     true,
-					ValidateFunc: validation.IntBetween(131072, 1048576),
+					ValidateFunc: validation.IntBetween(131072, 2097152),
 				},
 
 				"vm_max_map_count": {
diff --git a/website/docs/r/kubernetes_cluster.html.markdown b/website/docs/r/kubernetes_cluster.html.markdown
index e82cf0ace854..dd15afff6cce 100644
--- a/website/docs/r/kubernetes_cluster.html.markdown
+++ b/website/docs/r/kubernetes_cluster.html.markdown
@@ -841,7 +841,7 @@ A `sysctl_config` block supports the following:
 
 * `net_core_wmem_max` - (Optional) The sysctl setting net.core.wmem_max. Must be between `212992` and `134217728`. Changing this forces a new resource to be created.
 
-* `net_ipv4_ip_local_port_range_max` - (Optional) The sysctl setting net.ipv4.ip_local_port_range max value. Must be between `1024` and `60999`. Changing this forces a new resource to be created.
+* `net_ipv4_ip_local_port_range_max` - (Optional) The sysctl setting net.ipv4.ip_local_port_range max value. Must be between `32768` and `65535`. Changing this forces a new resource to be created.
 
 * `net_ipv4_ip_local_port_range_min` - (Optional) The sysctl setting net.ipv4.ip_local_port_range min value. Must be between `1024` and `60999`. Changing this forces a new resource to be created.
 
@@ -853,7 +853,7 @@ A `sysctl_config` block supports the following:
 
 * `net_ipv4_tcp_fin_timeout` - (Optional) The sysctl setting net.ipv4.tcp_fin_timeout. Must be between `5` and `120`. Changing this forces a new resource to be created.
 
-* `net_ipv4_tcp_keepalive_intvl` - (Optional) The sysctl setting net.ipv4.tcp_keepalive_intvl. Must be between `10` and `75`. Changing this forces a new resource to be created.
+* `net_ipv4_tcp_keepalive_intvl` - (Optional) The sysctl setting net.ipv4.tcp_keepalive_intvl. Must be between `10` and `90`. Changing this forces a new resource to be created.
 
 * `net_ipv4_tcp_keepalive_probes` - (Optional) The sysctl setting net.ipv4.tcp_keepalive_probes. Must be between `1` and `15`. Changing this forces a new resource to be created.
 
@@ -865,9 +865,9 @@ A `sysctl_config` block supports the following:
 
 * `net_ipv4_tcp_tw_reuse` - (Optional) The sysctl setting net.ipv4.tcp_tw_reuse. Changing this forces a new resource to be created.
 
-* `net_netfilter_nf_conntrack_buckets` - (Optional) The sysctl setting net.netfilter.nf_conntrack_buckets. Must be between `65536` and `147456`. Changing this forces a new resource to be created.
+* `net_netfilter_nf_conntrack_buckets` - (Optional) The sysctl setting net.netfilter.nf_conntrack_buckets. Must be between `65536` and `524288`. Changing this forces a new resource to be created.
 
-* `net_netfilter_nf_conntrack_max` - (Optional) The sysctl setting net.netfilter.nf_conntrack_max. Must be between `131072` and `1048576`. Changing this forces a new resource to be created.
+* `net_netfilter_nf_conntrack_max` - (Optional) The sysctl setting net.netfilter.nf_conntrack_max. Must be between `131072` and `2097152`. Changing this forces a new resource to be created.
 
 * `vm_max_map_count` - (Optional) The sysctl setting vm.max_map_count. Must be between `65530` and `262144`. Changing this forces a new resource to be created.
 
diff --git a/website/docs/r/kubernetes_cluster_node_pool.html.markdown b/website/docs/r/kubernetes_cluster_node_pool.html.markdown
index 021b9dc1d3ea..5cb8c426a983 100644
--- a/website/docs/r/kubernetes_cluster_node_pool.html.markdown
+++ b/website/docs/r/kubernetes_cluster_node_pool.html.markdown
@@ -254,7 +254,7 @@ A `sysctl_config` block supports the following:
 
 * `net_core_wmem_max` - (Optional) The sysctl setting net.core.wmem_max. Must be between `212992` and `134217728`. Changing this forces a new resource to be created.
 
-* `net_ipv4_ip_local_port_range_max` - (Optional) The sysctl setting net.ipv4.ip_local_port_range max value. Must be between `1024` and `60999`. Changing this forces a new resource to be created.
+* `net_ipv4_ip_local_port_range_max` - (Optional) The sysctl setting net.ipv4.ip_local_port_range max value. Must be between `32768` and `65535`. Changing this forces a new resource to be created.
 
 * `net_ipv4_ip_local_port_range_min` - (Optional) The sysctl setting net.ipv4.ip_local_port_range min value. Must be between `1024` and `60999`. Changing this forces a new resource to be created.
 
@@ -266,7 +266,7 @@ A `sysctl_config` block supports the following:
 
 * `net_ipv4_tcp_fin_timeout` - (Optional) The sysctl setting net.ipv4.tcp_fin_timeout. Must be between `5` and `120`. Changing this forces a new resource to be created.
 
-* `net_ipv4_tcp_keepalive_intvl` - (Optional) The sysctl setting net.ipv4.tcp_keepalive_intvl. Must be between `10` and `75`. Changing this forces a new resource to be created.
+* `net_ipv4_tcp_keepalive_intvl` - (Optional) The sysctl setting net.ipv4.tcp_keepalive_intvl. Must be between `10` and `90`. Changing this forces a new resource to be created.
 
 * `net_ipv4_tcp_keepalive_probes` - (Optional) The sysctl setting net.ipv4.tcp_keepalive_probes. Must be between `1` and `15`. Changing this forces a new resource to be created.
 
@@ -278,9 +278,9 @@ A `sysctl_config` block supports the following:
 
 * `net_ipv4_tcp_tw_reuse` - (Optional) Is sysctl setting net.ipv4.tcp_tw_reuse enabled? Changing this forces a new resource to be created.
 
-* `net_netfilter_nf_conntrack_buckets` - (Optional) The sysctl setting net.netfilter.nf_conntrack_buckets. Must be between `65536` and `147456`. Changing this forces a new resource to be created.
+* `net_netfilter_nf_conntrack_buckets` - (Optional) The sysctl setting net.netfilter.nf_conntrack_buckets. Must be between `65536` and `524288`. Changing this forces a new resource to be created.
 
-* `net_netfilter_nf_conntrack_max` - (Optional) The sysctl setting net.netfilter.nf_conntrack_max. Must be between `131072` and `1048576`. Changing this forces a new resource to be created.
+* `net_netfilter_nf_conntrack_max` - (Optional) The sysctl setting net.netfilter.nf_conntrack_max. Must be between `131072` and `2097152`. Changing this forces a new resource to be created.
 
 * `vm_max_map_count` - (Optional) The sysctl setting vm.max_map_count. Must be between `65530` and `262144`. Changing this forces a new resource to be created.