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Bug #12630
closed
States are always created on the default gateway interface.
Status:
Not a Bug
Priority:
Normal
Assignee:
-
Category:
Operating System
Target version:
-
Start date:
Due date:
% Done:
0%
Estimated time:
Plus Target Version:
Release Notes:
Default
Affected Version:
Affected Architecture:
Description
Tested on 21.05 and 22.01.b.20211220.0600.
When a service (like OpenVPN) binds to a specific IP, the states always get created on the interface of the default gateway rather than the interface for which the IP belongs to.
- Set up 2 WAN interfaces for testing. Keep WAN1 as default gateway.
- Start a ping using WAN2:
ping -S 192.0.2.242 198.51.100.2
WAN Interfaces:
vmx1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
description: WAN1
options=e000bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
capabilities=f507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO,NETMAP,RXCSUM_IPV6,TXCSUM_IPV6>
ether 00:50:56:b2:3c:91
inet6 fe80::250:56ff:feb2:3c91%vmx1 prefixlen 64 scopeid 0x2
inet 192.0.2.2 netmask 0xfffffff0 broadcast 192.0.2.15
inet 192.0.2.4 netmask 0xfffffff0 broadcast 192.0.2.15 vhid 4
carp: MASTER vhid 4 advbase 1 advskew 0
media: Ethernet autoselect
status: active
supported media:
media autoselect
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
[...]
vmx3: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
description: WAN2
options=e000bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
capabilities=f507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO,NETMAP,RXCSUM_IPV6,TXCSUM_IPV6>
ether 00:50:56:b2:06:44
inet6 fe80::250:56ff:feb2:644%vmx3 prefixlen 64 scopeid 0x4
inet 192.0.2.242 netmask 0xfffffff0 broadcast 192.0.2.255
inet 192.0.2.244 netmask 0xfffffff0 broadcast 192.0.2.255 vhid 6
carp: MASTER vhid 6 advbase 1 advskew 0
media: Ethernet autoselect
status: active
supported media:
media autoselect
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
netstat -rn4
Internet: Destination Gateway Flags Netif Expire default 192.0.2.1 UGS vmx1 10.254.1.0/30 link#3 U vmx2 10.254.1.1 link#3 UHS lo0 10.255.5.1 link#7 UH lo0 127.0.0.1 link#7 UH lo0 172.19.1.0/24 link#5 U vmx4 172.19.1.1 link#5 UHS lo0 172.19.1.3 link#5 UHS lo0 172.19.2.0/24 link#1 U vmx0 172.19.2.1 link#1 UHS lo0 172.19.2.3 link#1 UHS lo0 192.0.2.0/28 link#2 U vmx1 192.0.2.2 link#2 UHS lo0 192.0.2.4 link#2 UHS lo0 192.0.2.240/28 link#4 U vmx3 192.0.2.242 link#4 UHS lo0 192.0.2.244 link#4 UHS lo0
pfctl -vvss
all icmp 192.0.2.242:54170 -> 198.51.100.2:54170 0:0 age 00:00:11, expires in 00:00:09, 11:11 pkts, 924:924 bytes, rule 102 id: bf7ec36100000000 creatorid: 104b3718 gateway: 192.0.2.241 origif: vmx1
pfctl -vvsr
@102(0) pass out route-to (vmx3 192.0.2.241) inet from 192.0.2.242 to ! 192.0.2.240/28 flags S/SA keep state allow-opts label "let out anything from firewall host itself" ridentifier 1000006963 [ Evaluations: 245 Packets: 131 Bytes: 10980 States: 1 ] [ Inserted: pid 59836 State Creations: 2 ]
Related issues
Updated by Jim Pingle almost 3 years ago
- Status changed from New to Not a Bug
This is the expected behavior. The outgoing interface is chosen by the operating system routing table and can't be influenced by pf. Adjustments made by pf using route-to and so on would still have states on whatever interface was chosen by the OS as that's where the packet attempted to exit first.
Updated by Marcos M over 2 years ago
- Related to Regression #13420: TCP traffic sourced from the firewall can only use the default gateway added
Updated by Marcos M 11 months ago
- Related to Todo #15220: Handle ``route-to`` and ``reply-to`` states when using the ``if-bound`` state policy added
Updated by Marcos M 11 months ago
- Related to Todo #15173: Add global option to set default PF State Policy (if-bound vs floating) added
Updated by Marcos M 11 months ago
- Related to deleted (Todo #15220: Handle ``route-to`` and ``reply-to`` states when using the ``if-bound`` state policy)
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