diff --git a/proxy/create_container_interceptor.go b/proxy/create_container_interceptor.go
index b7d8d0c2..db365c61 100644
--- a/proxy/create_container_interceptor.go
+++ b/proxy/create_container_interceptor.go
@@ -46,7 +46,7 @@ func (i *createContainerInterceptor) InterceptRequest(r *http.Request) error {
 		return err
 	}
 
-	if cidrs, ok := i.proxy.weaveCIDRsFromConfig(container.Config); ok {
+	if cidrs, ok := i.proxy.weaveCIDRsFromConfig(container.Config, container.HostConfig); ok {
 		Info.Printf("Creating container with WEAVE_CIDR \"%s\"", strings.Join(cidrs, " "))
 		if container.HostConfig == nil {
 			container.HostConfig = &docker.HostConfig{}
diff --git a/proxy/create_exec_interceptor.go b/proxy/create_exec_interceptor.go
index 33e655d9..d8a15815 100644
--- a/proxy/create_exec_interceptor.go
+++ b/proxy/create_exec_interceptor.go
@@ -30,7 +30,7 @@ func (i *createExecInterceptor) InterceptRequest(r *http.Request) error {
 	}
 
 	_, hasWeaveWait := container.Volumes["/w"]
-	cidrs, hasCIDRs := i.proxy.weaveCIDRsFromConfig(container.Config)
+	cidrs, hasCIDRs := i.proxy.weaveCIDRsFromConfig(container.Config, container.HostConfig)
 	if hasCIDRs && hasWeaveWait {
 		Info.Printf("Exec in container %s with WEAVE_CIDR \"%s\"", container.ID, strings.Join(cidrs, " "))
 		cmd := append(weaveWaitEntrypoint, "-s")
diff --git a/proxy/proxy.go b/proxy/proxy.go
index c391431f..8964b074 100644
--- a/proxy/proxy.go
+++ b/proxy/proxy.go
@@ -115,7 +115,12 @@ func (proxy *Proxy) ListenAndServe() error {
 	return (&http.Server{Handler: proxy}).Serve(listener)
 }
 
-func (proxy *Proxy) weaveCIDRsFromConfig(config *docker.Config) ([]string, bool) {
+func (proxy *Proxy) weaveCIDRsFromConfig(config *docker.Config, hostConfig *docker.HostConfig) ([]string, bool) {
+	if hostConfig != nil &&
+		hostConfig.NetworkMode != "" &&
+		hostConfig.NetworkMode != "bridge" {
+		return nil, false
+	}
 	for _, e := range config.Env {
 		if strings.HasPrefix(e, "WEAVE_CIDR=") {
 			if e[11:] == "none" {
diff --git a/proxy/start_container_interceptor.go b/proxy/start_container_interceptor.go
index 4d54680d..ece4069f 100644
--- a/proxy/start_container_interceptor.go
+++ b/proxy/start_container_interceptor.go
@@ -21,7 +21,7 @@ func (i *startContainerInterceptor) InterceptResponse(r *http.Response) error {
 		return err
 	}
 
-	cidrs, ok := i.proxy.weaveCIDRsFromConfig(container.Config)
+	cidrs, ok := i.proxy.weaveCIDRsFromConfig(container.Config, container.HostConfig)
 	if !ok {
 		Debug.Print("No Weave CIDR, ignoring")
 		return nil
diff --git a/test/660_proxy_ipam_test.sh b/test/660_proxy_ipam_test.sh
index 11137995..ed1e589b 100755
--- a/test/660_proxy_ipam_test.sh
+++ b/test/660_proxy_ipam_test.sh
@@ -26,13 +26,21 @@ start $HOST1 --name=auto
 start $HOST1 --name=none       -e WEAVE_CIDR=none
 start $HOST2 --name=zero       -e WEAVE_CIDR=
 start $HOST2 --name=no-default
+start $HOST1 --name=bridge     --net=bridge
+start $HOST1 --name=host       --net=host
+start $HOST1 --name=other      --net=container:auto
 
 AUTO=$(container_ip $HOST1 auto)
 ZERO=$(container_ip $HOST2 zero)
+BRIDGE=$(container_ip $HOST1 bridge)
+OTHER=$(container_ip $HOST1 other)
 assert_raises "proxy exec_on $HOST1 auto $PING $ZERO"
 assert_raises "proxy exec_on $HOST2 zero $PING $AUTO"
+assert_raises "proxy exec_on $HOST2 zero $PING $BRIDGE"
+assert_raises "proxy exec_on $HOST2 zero $PING $OTHER"
 
 assert_no_ethwe $HOST1 none
 assert_no_ethwe $HOST2 no-default
+assert_no_ethwe $HOST1 host
 
 end_suite