On 06/13/2016 06:25 AM, Răzvan Sandu wrote:
> Hello,
> 
> Please explain (in a piece of documentation similar to
> http://shorewall.net/Shorewall_and_Aliased_Interfaces.html) how to
> *correctly* define and use VLAN interfaces with shorewall.
> 
> This seems to be an entirely different situation than aliased
> interfaces, because of their (desired) complete separation at the OSI 2
> level.
> 
> Defining VLAN interfaces on Red Hat/Fedora distros is explained here:
> 
> https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Networking_Guide/sec-Configure_802_1Q_VLAN_Tagging_Using_the_Command_Line.html
> 
> However, in practice, simply creating virtual interfaces ethX.100 and
> ethX.200, assigning IP addreses to them and putting them in different
> firewall zones seems not to work. This is especially the case when one
> of the VLANs is the default one (VLAN1, on ethX.1), because some
> returning frames seems to be treated by the parent interface ethX
> instead of ethX.1 (VLAN1), despite being tagged with VID1, not untagged.

I have no direct experience with VLANs, so I am not a candidate to write
such an article. But your symptoms sound like a switch configuration issue.

-Tom
-- 
Tom Eastep        \ When I die, I want to go like my Grandfather who
Shoreline,         \ died peacefully in his sleep. Not screaming like
Washington, USA     \ all of the passengers in his car
http://shorewall.net \________________________________________________

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