diff --git a/pkg/tcpip/network/ipv4/ipv4.go b/pkg/tcpip/network/ipv4/ipv4.go
index a43107d..a1660e9 100644
--- a/pkg/tcpip/network/ipv4/ipv4.go
+++ b/pkg/tcpip/network/ipv4/ipv4.go
@@ -641,7 +641,7 @@
 	}
 
 	if !e.nic.IsLoopback() {
-		if e.protocol.options.DropExternalLoopbackTraffic {
+		if !e.protocol.options.AllowExternalLoopbackTraffic {
 			if header.IsV4LoopbackAddress(h.SourceAddress()) {
 				stats.InvalidSourceAddressesReceived.Increment()
 				return
@@ -1230,9 +1230,9 @@
 	// IGMP holds options for IGMP.
 	IGMP IGMPOptions
 
-	// DropExternalLoopbackTraffic indicates that inbound loopback packets (i.e.
-	// martian loopback packets) should be dropped.
-	DropExternalLoopbackTraffic bool
+	// AllowExternalLoopbackTraffic indicates that inbound loopback packets (i.e.
+	// martian loopback packets) should be accepted.
+	AllowExternalLoopbackTraffic bool
 }
 
 // NewProtocolWithOptions returns an IPv4 network protocol.
diff --git a/pkg/tcpip/network/ipv6/ipv6.go b/pkg/tcpip/network/ipv6/ipv6.go
index b94cb42..83e98ba 100644
--- a/pkg/tcpip/network/ipv6/ipv6.go
+++ b/pkg/tcpip/network/ipv6/ipv6.go
@@ -931,7 +931,7 @@
 	}
 
 	if !e.nic.IsLoopback() {
-		if e.protocol.options.DropExternalLoopbackTraffic {
+		if !e.protocol.options.AllowExternalLoopbackTraffic {
 			if header.IsV6LoopbackAddress(h.SourceAddress()) {
 				stats.InvalidSourceAddressesReceived.Increment()
 				return
@@ -2071,9 +2071,9 @@
 	// DADConfigs holds the default DAD configurations used by IPv6 endpoints.
 	DADConfigs stack.DADConfigurations
 
-	// DropExternalLoopbackTraffic indicates that inbound loopback packets (i.e.
-	// martian loopback packets) should be dropped.
-	DropExternalLoopbackTraffic bool
+	// AllowExternalLoopbackTraffic indicates that inbound loopback packets (i.e.
+	// martian loopback packets) should be accepted.
+	AllowExternalLoopbackTraffic bool
 }
 
 // NewProtocolWithOptions returns an IPv6 network protocol.