diff --git a/repos/os/src/server/nic_router/interface.cc b/repos/os/src/server/nic_router/interface.cc
index 45397450a9..79a27de36c 100644
--- a/repos/os/src/server/nic_router/interface.cc
+++ b/repos/os/src/server/nic_router/interface.cc
@@ -293,28 +293,26 @@ void Interface::_destroy_link(Link &link)
 }
 
 
-void Interface::_pass_prot(Ethernet_frame       &eth,
-                           Size_guard           &size_guard,
-                           Ipv4_packet          &ip,
-                           L3_protocol    const  prot,
-                           void          *const  prot_base,
-                           size_t         const  prot_size)
+void Interface::_pass_prot_to_domain(Domain             &domain,
+                                     Ethernet_frame     &eth,
+                                     Size_guard         &size_guard,
+                                     Ipv4_packet        &ip,
+                                     L3_protocol  const  prot,
+                                     void        *const  prot_base,
+                                     size_t       const  prot_size)
 {
-	eth.src(_router_mac);
-	if (!_domain().use_arp()) {
-		eth.dst(_router_mac);
-	}
-	_update_checksum(prot, prot_base, prot_size, ip.src(), ip.dst(), ip.total_length());
-	_pass_ip(eth, size_guard, ip);
-}
+	_update_checksum(
+		prot, prot_base, prot_size, ip.src(), ip.dst(), ip.total_length());
 
-
-void Interface::_pass_ip(Ethernet_frame &eth,
-                         Size_guard     &size_guard,
-                         Ipv4_packet    &ip)
-{
 	ip.update_checksum();
-	send(eth, size_guard);
+	domain.interfaces().for_each([&] (Interface &interface)
+	{
+		eth.src(interface._router_mac);
+		if (!domain.use_arp()) {
+			eth.dst(interface._router_mac);
+		}
+		interface.send(eth, size_guard);
+	});
 }
 
 
@@ -606,9 +604,9 @@ void Interface::_nat_link_and_pass(Ethernet_frame        &eth,
 		Link_side_id const remote_id = { ip.dst(), _dst_port(prot, prot_base),
 		                                 ip.src(), _src_port(prot, prot_base) };
 		_new_link(prot, local_id, remote_port_alloc, remote_domain, remote_id);
-		remote_domain.interfaces().for_each([&] (Interface &interface) {
-			interface._pass_prot(eth, size_guard, ip, prot, prot_base, prot_size);
-		});
+		_pass_prot_to_domain(
+			remote_domain, eth, size_guard, ip, prot, prot_base, prot_size);
+
 	} catch (Port_allocator_guard::Out_of_indices) {
 		switch (prot) {
 		case L3_protocol::TCP:  _tcp_stats.refused_for_ports++;  break;
@@ -1001,11 +999,10 @@ void Interface::_handle_icmp_query(Ethernet_frame          &eth,
 			ip.dst(remote_side.src_ip());
 			_src_port(prot, prot_base, remote_side.dst_port());
 			_dst_port(prot, prot_base, remote_side.src_port());
+			_pass_prot_to_domain(
+				remote_domain, eth, size_guard, ip, prot, prot_base,
+				prot_size);
 
-			remote_domain.interfaces().for_each([&] (Interface &interface) {
-				interface._pass_prot(
-					eth, size_guard, ip, prot, prot_base, prot_size);
-			});
 			_link_packet(prot, prot_base, link, client);
 			done = true;
 		},
@@ -1249,11 +1246,10 @@ void Interface::_handle_ip(Ethernet_frame          &eth,
 				ip.dst(remote_side.src_ip());
 				_src_port(prot, prot_base, remote_side.dst_port());
 				_dst_port(prot, prot_base, remote_side.src_port());
+				_pass_prot_to_domain(
+					remote_domain, eth, size_guard, ip, prot, prot_base,
+					prot_size);
 
-				remote_domain.interfaces().for_each([&] (Interface &interface) {
-					interface._pass_prot(
-						eth, size_guard, ip, prot, prot_base, prot_size);
-				});
 				_link_packet(prot, prot_base, link, client);
 				done = true;
 			},
@@ -1330,11 +1326,10 @@ void Interface::_handle_ip(Ethernet_frame          &eth,
 
 			Domain &remote_domain = rule.domain();
 			_adapt_eth(eth, ip.dst(), pkt, remote_domain);
-			remote_domain.interfaces().for_each(
-				[&] (Interface &interface) {
-					interface._pass_ip(eth, size_guard, ip);
-				}
-			);
+			ip.update_checksum();
+			remote_domain.interfaces().for_each([&] (Interface &interface) {
+				interface.send(eth, size_guard);
+			});
 			done = true;
 		},
 		[&] /* handle_no_match */ () { }
diff --git a/repos/os/src/server/nic_router/interface.h b/repos/os/src/server/nic_router/interface.h
index 4c670b7164..7e585767e5 100644
--- a/repos/os/src/server/nic_router/interface.h
+++ b/repos/os/src/server/nic_router/interface.h
@@ -276,16 +276,13 @@ class Net::Interface : private Interface_list::Element
 		                       Size_guard     &size_guard,
 		                       Domain         &local_domain);
 
-		void _pass_prot(Ethernet_frame         &eth,
-		                Size_guard             &size_guard,
-		                Ipv4_packet            &ip,
-		                L3_protocol      const  prot,
-		                void            *const  prot_base,
-		                Genode::size_t   const  prot_size);
-
-		void _pass_ip(Ethernet_frame       &eth,
-		              Size_guard           &size_guard,
-		              Ipv4_packet          &ip);
+		void _pass_prot_to_domain(Domain                &domain,
+		                          Ethernet_frame        &eth,
+		                          Size_guard            &size_guard,
+		                          Ipv4_packet           &ip,
+		                          L3_protocol     const  prot,
+		                          void           *const  prot_base,
+		                          Genode::size_t  const  prot_size);
 
 		void _handle_pkt();