Issues applying LOCAL rules

1

Hi,

I have VyOS working with internet access OK, but after applying this config (create local zone), I allowed SSH connections but lost internet access.

set firewall zone LOCAL local-zone
set firewall zone LOCAL from LAN firewall name ‘LAN-to-LOCAL’
set firewall ipv4 name LAN-to-LOCAL default-action ‘drop’
set firewall ipv4 name LAN-to-LOCAL rule 10 action ‘accept’
set firewall ipv4 name LAN-to-LOCAL rule 10 description ‘explicit allow inbound ssh always (anti-lockout)’
set firewall ipv4 name LAN-to-LOCAL rule 10 destination port ‘22’
set firewall ipv4 name LAN-to-LOCAL rule 10 protocol ‘tcp’
set firewall ipv4 name LAN-to-LOCAL rule 10 source group network-group ‘lan-network’

set firewall ipv4 name LAN-to-LOCAL rule 11 action ‘accept’
set firewall ipv4 name LAN-to-LOCAL rule 11 description ‘allow dhcp’
set firewall ipv4 name LAN-to-LOCAL rule 11 destination port ‘67-68’
set firewall ipv4 name LAN-to-LOCAL rule 11 protocol ‘udp’
set firewall ipv4 name LAN-to-LOCAL rule 11 source port ‘67-68’

set firewall ipv4 name LAN-to-LOCAL rule 12 action ‘accept’
set firewall ipv4 name LAN-to-LOCAL rule 12 description ‘allow internet’
set firewall ipv4 name LAN-to-LOCAL rule 12 destination address-mask ‘0.0.0.0’
set firewall ipv4 name LAN-to-LOCAL rule 12 source group network-group ‘lan-network’

ipv4 Firewall “name LAN-to-LOCAL”

Rule Packets Bytes Action Source Destination Inbound-Interface Outbound-interface

10 3 192 accept lan-network any any any
11 5 1660 accept any any any any
12 22 3264 accept lan-network any any any
default 202 12120 drop any any any any

In my config global have this:
set firewall global-options state-policy established action ‘accept’
set firewall global-options state-policy invalid action ‘drop’
set firewall global-options state-policy related action ‘accept’

2

I would suggest removing this.

set firewall ipv4 name LAN-to-LOCAL rule 12 destination address-mask ‘0.0.0.0’

Or changing it to 255.255.255.255

At the moment I’m pretty sure you mask matches nothing, thus rule 12 will never work.

3

I change by 255.255.255.255 commit, ( lost internet )

I delete rule 12 and commit ( lost internet)

I don’t know why happen this.

This issue happen only when create local zone and assign rules.

4

I’ve not used Zone based firewalls on VyOS before (you can probably tell)

I expect you need an “allow established” rule (rule 1) that allows for traffic in the return direction.

5

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