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Message #50100
[Bug 1492142] Re: FWaaS: FIP namespace created after/before Firewall creation doesn't contain FW rules
This could be fixed for backporting purposes, but fixing it in master
does not seem worthwhile as the FWaaS v2 API means the implementation
must be revised. It's now over a month since the last expiration. At
some point we must admit when too late is too late.
** Changed in: neutron
Status: In Progress => Won't Fix
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https://bugs.launchpad.net/bugs/1492142
Title:
FWaaS: FIP namespace created after/before Firewall creation doesn't
contain FW rules
Status in neutron:
Won't Fix
Bug description:
L3 agent is set to "dvr_snat" mode.
Steps to reproduce:
1) Create security group rules
2) Boot nova instance
3) Create floating ip on public network and associate it to the nova instance
4) Create firewall rules
5) Create firewall policy with the above rules
6) Create firewall with the above policy
Expected Result:
Both SNAT and FIP namespaces should contain the FW rules
Observed Result:
Only SNAT namespace contains the FW rules while the FIP namespace doesn't
Impact:
Due to this, the packets transferred over the external network that are destined to this instance could bypass the firewall rules using the floating ip of the instance.
Following are the commands and their output:
demofw@devstack:~/devstack$ neutron router-show router1
+-----------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Field | Value |
+-----------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| admin_state_up | True |
| external_gateway_info | {"network_id": "b162e6a0-ab7b-4a2f-8239-e06f1e13ccb5", "enable_snat": true, "external_fixed_ips": [{"subnet_id": "4743e969-7a36-427e-86e0-908c767c9d12", "ip_address": "172.24.4.2"}, {"subnet_id": "8f59a96f-2a06-4973-bbf9-40ae143ec1df", "ip_address": "2001:db8::3"}]} |
| id | fb2f3983-7a9d-4bc7-812c-20f0c182ef1a |
| name | router1 |
| routes | |
| status | ACTIVE |
| tenant_id | b8e6948ab2394672b2fa603c75d02eda |
+-----------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
demofw@devstack:~/devstack$ neutron floatingip-create public --port-id 0d283e44-96e9-4f98-9db1-5f464f8163b8
Created a new floatingip:
+---------------------+--------------------------------------+
| Field | Value |
+---------------------+--------------------------------------+
| fixed_ip_address | 10.0.0.4 |
| floating_ip_address | 172.24.4.5 |
| floating_network_id | b162e6a0-ab7b-4a2f-8239-e06f1e13ccb5 |
| id | 278316a4-3aa4-4414-812c-b909823c5915 |
| port_id | 0d283e44-96e9-4f98-9db1-5f464f8163b8 |
| router_id | fb2f3983-7a9d-4bc7-812c-20f0c182ef1a |
| status | DOWN |
| tenant_id | b8e6948ab2394672b2fa603c75d02eda |
+---------------------+--------------------------------------+
demofw@devstack:~/devstack$ nova list
+--------------------------------------+------+--------+------------+-------------+-------------------------------------------------------------------+
| ID | Name | Status | Task State | Power State | Networks |
+--------------------------------------+------+--------+------------+-------------+-------------------------------------------------------------------+
| 9194e3a1-4d15-4a13-a2bc-32609c1a5f23 | vm1 | ACTIVE | - | Running | private=fd54:320b:956:0:f816:3eff:fe85:8d8d, 10.0.0.4, 172.24.4.5 |
+--------------------------------------+------+--------+------------+-------------+-------------------------------------------------------------------+
demofw@devstack:~/devstack$ neutron firewall-rule-list
+--------------------------------------+-----------+--------------------------------------+----------------------+---------+
| id | name | firewall_policy_id | summary | enabled |
+--------------------------------------+-----------+--------------------------------------+----------------------+---------+
| 4056da20-96f4-4504-91ac-252dd4b86c76 | deny-icmp | 75599732-0995-43d6-a859-6995b31a5115 | ICMP, | True |
| | | | source: none(none), | |
| | | | dest: none(none), | |
| | | | deny | |
| b1f3b83f-6e34-49d6-92b0-f707e9e8ee1e | deny-http | 75599732-0995-43d6-a859-6995b31a5115 | TCP, | True |
| | | | source: none(none), | |
| | | | dest: none(80), | |
| | | | deny | |
| cba48aea-35ee-4c3b-80f0-d3799f13407f | allow-ssh | 75599732-0995-43d6-a859-6995b31a5115 | TCP, | True |
| | | | source: none(none), | |
| | | | dest: none(22), | |
| | | | allow | |
+--------------------------------------+-----------+--------------------------------------+----------------------+---------+
demofw@devstack:~/devstack$ neutron firewall-policy-list
+--------------------------------------+-----------+----------------------------------------+
| id | name | firewall_rules |
+--------------------------------------+-----------+----------------------------------------+
| 75599732-0995-43d6-a859-6995b31a5115 | policy-fw | [4056da20-96f4-4504-91ac-252dd4b86c76, |
| | | b1f3b83f-6e34-49d6-92b0-f707e9e8ee1e, |
| | | cba48aea-35ee-4c3b-80f0-d3799f13407f] |
+--------------------------------------+-----------+----------------------------------------+
demofw@devstack:~/devstack$ neutron firewall-show demo-fw
+--------------------+--------------------------------------+
| Field | Value |
+--------------------+--------------------------------------+
| admin_state_up | True |
| description | |
| firewall_policy_id | 75599732-0995-43d6-a859-6995b31a5115 |
| id | 66560c40-9fe1-410b-98ea-9367145d6692 |
| name | demo-fw |
| router_ids | fb2f3983-7a9d-4bc7-812c-20f0c182ef1a |
| status | ACTIVE |
| tenant_id | b8e6948ab2394672b2fa603c75d02eda |
+--------------------+--------------------------------------+
demofw@devstack:~/devstack$ ip netns
fip-b162e6a0-ab7b-4a2f-8239-e06f1e13ccb5
snat-fb2f3983-7a9d-4bc7-812c-20f0c182ef1a
qrouter-fb2f3983-7a9d-4bc7-812c-20f0c182ef1a
qdhcp-855d0284-89d6-4045-8355-367f97d408f3
demofw@devstack:~/devstack$ sudo ip netns exec snat-fb2f3983-7a9d-4bc7-812c-20f0c182ef1a iptables -L -n -v
Chain INPUT (policy ACCEPT 4 packets, 1284 bytes)
pkts bytes target prot opt in out source destination
4 1284 neutron-l3-agent-INPUT all -- * * 0.0.0.0/0 0.0.0.0/0
Chain FORWARD (policy ACCEPT 2 packets, 168 bytes)
pkts bytes target prot opt in out source destination
2 168 neutron-filter-top all -- * * 0.0.0.0/0 0.0.0.0/0
2 168 neutron-l3-agent-FORWARD all -- * * 0.0.0.0/0 0.0.0.0/0
Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 neutron-filter-top all -- * * 0.0.0.0/0 0.0.0.0/0
0 0 neutron-l3-agent-OUTPUT all -- * * 0.0.0.0/0 0.0.0.0/0
Chain neutron-filter-top (2 references)
pkts bytes target prot opt in out source destination
2 168 neutron-l3-agent-local all -- * * 0.0.0.0/0 0.0.0.0/0
Chain neutron-l3-agent-FORWARD (1 references)
pkts bytes target prot opt in out source destination
0 0 neutron-l3-agent-iv466560c40 all -- * sg-+ 0.0.0.0/0 0.0.0.0/0
0 0 neutron-l3-agent-ov466560c40 all -- sg-+ * 0.0.0.0/0 0.0.0.0/0
0 0 neutron-l3-agent-fwaas-defau all -- * sg-+ 0.0.0.0/0 0.0.0.0/0
0 0 neutron-l3-agent-fwaas-defau all -- sg-+ * 0.0.0.0/0 0.0.0.0/0
Chain neutron-l3-agent-INPUT (1 references)
pkts bytes target prot opt in out source destination
Chain neutron-l3-agent-OUTPUT (1 references)
pkts bytes target prot opt in out source destination
Chain neutron-l3-agent-fwaas-defau (2 references)
pkts bytes target prot opt in out source destination
0 0 DROP all -- * * 0.0.0.0/0 0.0.0.0/0
Chain neutron-l3-agent-iv466560c40 (1 references)
pkts bytes target prot opt in out source destination
0 0 DROP all -- * * 0.0.0.0/0 0.0.0.0/0 state INVALID
0 0 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
0 0 DROP icmp -- * * 0.0.0.0/0 0.0.0.0/0
0 0 DROP tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:80
0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:22
Chain neutron-l3-agent-local (1 references)
pkts bytes target prot opt in out source destination
Chain neutron-l3-agent-ov466560c40 (1 references)
pkts bytes target prot opt in out source destination
0 0 DROP all -- * * 0.0.0.0/0 0.0.0.0/0 state INVALID
0 0 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
0 0 DROP icmp -- * * 0.0.0.0/0 0.0.0.0/0
0 0 DROP tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:80
0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:22
demofw@devstack:~/devstack$ sudo ip netns exec fip-b162e6a0-ab7b-4a2f-8239-e06f1e13ccb5 iptables -L -n -v
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 neutron-l3-agent-INPUT all -- * * 0.0.0.0/0 0.0.0.0/0
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 neutron-filter-top all -- * * 0.0.0.0/0 0.0.0.0/0
0 0 neutron-l3-agent-FORWARD all -- * * 0.0.0.0/0 0.0.0.0/0
Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 neutron-filter-top all -- * * 0.0.0.0/0 0.0.0.0/0
0 0 neutron-l3-agent-OUTPUT all -- * * 0.0.0.0/0 0.0.0.0/0
Chain neutron-filter-top (2 references)
pkts bytes target prot opt in out source destination
0 0 neutron-l3-agent-local all -- * * 0.0.0.0/0 0.0.0.0/0
Chain neutron-l3-agent-FORWARD (1 references)
pkts bytes target prot opt in out source destination
Chain neutron-l3-agent-INPUT (1 references)
pkts bytes target prot opt in out source destination
Chain neutron-l3-agent-OUTPUT (1 references)
pkts bytes target prot opt in out source destination
Chain neutron-l3-agent-local (1 references)
pkts bytes target prot opt in out source destination
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References
