Description of problem:

From host and then access the service of UDN pod

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:

1. Create UDN network on one namespace

apiVersion: k8s.ovn.org/v1
kind: UserDefinedNetwork
metadata:
  name: udn-network
spec:
  topology: Layer3
  layer3:
    role: Primary
    mtu: 1300
    subnets:
    - cidr: 10.200.0.0/16
      hostsubnet: 24

2.  Create test pod and service on this namespace 

3. ssh into worker and  access the service

1. curl --connect-timeout 5 172.30.209.135:27017
   curl: (28) Connection timed out after 5000 milliseconds

Actual results:

Expected results:

From host access UDN service should work