diff --git a/cmd/kubeadm/app/preflight/checks.go b/cmd/kubeadm/app/preflight/checks.go
index bb4aa2319b0..201e8913065 100644
--- a/cmd/kubeadm/app/preflight/checks.go
+++ b/cmd/kubeadm/app/preflight/checks.go
@@ -54,8 +54,6 @@ import (
 )
 
 const (
-	bridgenf                    = "/proc/sys/net/bridge/bridge-nf-call-iptables"
-	bridgenf6                   = "/proc/sys/net/bridge/bridge-nf-call-ip6tables"
 	ipv4Forward                 = "/proc/sys/net/ipv4/ip_forward"
 	ipv6DefaultForwarding       = "/proc/sys/net/ipv6/conf/default/forwarding"
 	externalEtcdRequestTimeout  = 10 * time.Second
diff --git a/cmd/kubeadm/app/preflight/checks_linux.go b/cmd/kubeadm/app/preflight/checks_linux.go
index 188526f801c..3d23bf7730e 100644
--- a/cmd/kubeadm/app/preflight/checks_linux.go
+++ b/cmd/kubeadm/app/preflight/checks_linux.go
@@ -50,19 +50,17 @@ func addOSValidator(validators []system.Validator, reporter *system.StreamReport
 	return validators
 }
 
-// addIPv6Checks adds IPv6 related bridgenf and forwarding checks
+// addIPv6Checks adds IPv6 related checks
 func addIPv6Checks(checks []Checker) []Checker {
 	checks = append(checks,
-		FileContentCheck{Path: bridgenf6, Content: []byte{'1'}},
 		FileContentCheck{Path: ipv6DefaultForwarding, Content: []byte{'1'}},
 	)
 	return checks
 }
 
-// addIPv4Checks adds IPv4 related bridgenf and forwarding checks
+// addIPv4Checks adds IPv4 related checks
 func addIPv4Checks(checks []Checker) []Checker {
 	checks = append(checks,
-		FileContentCheck{Path: bridgenf, Content: []byte{'1'}},
 		FileContentCheck{Path: ipv4Forward, Content: []byte{'1'}})
 	return checks
 }
diff --git a/cmd/kubeadm/app/preflight/checks_other.go b/cmd/kubeadm/app/preflight/checks_other.go
index d1016b54ad7..62c6d9ba9dc 100644
--- a/cmd/kubeadm/app/preflight/checks_other.go
+++ b/cmd/kubeadm/app/preflight/checks_other.go
@@ -30,13 +30,13 @@ func addOSValidator(validators []system.Validator, _ *system.StreamReporter) []s
 	return validators
 }
 
-// addIPv6Checks adds IPv6 related bridgenf and forwarding checks
+// addIPv6Checks adds IPv6 related checks
 // No-op for Darwin (MacOS), Windows.
 func addIPv6Checks(checks []Checker) []Checker {
 	return checks
 }
 
-// addIPv4Checks adds IPv4 related bridgenf and forwarding checks
+// addIPv4Checks adds IPv4 related checks
 // No-op for Darwin (MacOS), Windows.
 func addIPv4Checks(checks []Checker) []Checker {
 	return checks