System: Wizard: causes no internet connection in static IPv4 WAN environment

[igpit]

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Bug decscription Walking through the Wizard, configuring a static IPv4 WAN, still 2 gateways get configured:

1. The IPv4 "WANGW" corresponding to your static WAN configuration. It will show as offline in System: Gateways: Single.
2. The IPv6 "WAN_DHCP6" from the default DHCP setting for IPv6 of the interface. It will be online in System: Gateways: Single, and cannot be removed there (of course, comes from interface configuration). Note: Getting state "online" happens even when no IPv6 configuration / DHCP is present.

To Reproduce Reset to defaults. Wizard: Configure static IPv4 WAN, have no DHCP on WAN side. Test ping to some WAN address, fails with "ping: sendto: No route to host"

Expected behavior

1. Disable IPv6 DHCP
2. Allow IPv6 setting (e.g. IPv6 Configuration Type: None) in Wizard

Workaround

1. After running through the wizard, go to Interfaces: WAN, and set "IPv6 Configuration Type: None".
2. Edit the IPv4 GW, changing nothing, save. The IPv4 GW will now change to state online.
3. ping works now.

Additional context related to #3874

Environment 19.7.8

[fichtner]

Hi, it seems like the default behaviour. IPv6 is left configured because the wizard never supported it.

[fichtner]

Relevant feature ticket without a contributor https://github.com/opnsense/core/issues/79

[igpit]

added:

Additional context related to #3874

[tk-wfischer]

Hi Franco,

I think I have found the root cause of this issue:

• The wizard configures the IPv4 Default Gateway (e.g. "10.1.102.1" in my case) with Protocol IPv6 -> this is wrong, it should be IPv4. Details see screenshot here: http://www.wefi.net/opnsense/Wizard-IPv4-Static.png

As a short fix/workaround:

• Go to "System" -> "Gateways" -> "Single" and edit the entry "WANGW". For some (to me strange) reasons, the editing dialog shows the "IPv4". So you just need to click "Save" - then the WANGW is correctly configured as IPv4 gateway, not as IPv6 gateway.