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[He Qing <tsinghe.7@xxxxxxxxx>]

Public bug reported:

Reproduction procedure:
1.An all-in-one devstack enviroment, use latest master branch and openvswitch driver:
[securitygroup]
firewall_driver = openvswitch

2. launch two VMs with security_group SG1, which have two rules:
rule1: egress, IPv4
rule2: ingress, IPv4, 22/tcp, remote_ip_prefix: 0.0.0.0/0

3.SSH to VM2 from VM1
4.Delete rule2, check that SSH connection is blocked
5.re-add rule1 to SG1, check that SSH connection is still blocked.
The reason is that the conntrack entry is not aged and marked to 1:
root@devstack:~# conntrack -L --zone=1
tcp      6 298 ESTABLISHED src=10.0.0.3 dst=10.0.0.8 sport=38844 dport=22 src=10.0.0.8 dst=10.0.0.3 sport=22 dport=38844 [ASSURED] mark=1 zone=1 use=1

** Affects: neutron
     Importance: Undecided
         Status: New


** Tags: ovs-fw

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https://bugs.launchpad.net/bugs/1715789

Title:
  ovsfw rejects old connections after re-add former rules

Status in neutron:
  New

Bug description:
  Reproduction procedure:
  1.An all-in-one devstack enviroment, use latest master branch and openvswitch driver:
  [securitygroup]
  firewall_driver = openvswitch

  2. launch two VMs with security_group SG1, which have two rules:
  rule1: egress, IPv4
  rule2: ingress, IPv4, 22/tcp, remote_ip_prefix: 0.0.0.0/0

  3.SSH to VM2 from VM1
  4.Delete rule2, check that SSH connection is blocked
  5.re-add rule1 to SG1, check that SSH connection is still blocked.
  The reason is that the conntrack entry is not aged and marked to 1:
  root@devstack:~# conntrack -L --zone=1
  tcp      6 298 ESTABLISHED src=10.0.0.3 dst=10.0.0.8 sport=38844 dport=22 src=10.0.0.8 dst=10.0.0.3 sport=22 dport=38844 [ASSURED] mark=1 zone=1 use=1

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