CARP and NAT question

[Julian Elischer]

On 10/8/19 8:58 AM, Julien Cigar wrote:
> On Tue, Oct 08, 2019 at 10:20:34AM -0500, Matthew Grooms wrote:
>> Hi Julien,
> Hi Matthew,
>
>> It's not clear why you are trying to assign multiple carp IP address to
>> two different interfaces from within the same IP subnet. Are you trying
>> to fail over a 2nd carp address or are you trying to improve
>> throughput/redundancy? If you just want to fail over a 2nd carp address,
>> assign a 2nd alias to your first interface. If your trying to improve
>> throughput/redundancy, assign both interfaces to a lagg and build your
>> carp interfaces on top of that instead.
>>
> Currently outbound traffic from $net1 and $net2 (two private networks)
> pass through the same network interface (igb0) (as you can see in (1)
> in my previous post) on the router. I'd like to prevent that
> $net2 saturates the interface and slow down traffic from $net1 (which is
> more important). I could lagg and build CARP on top of that but it
> wouldn't prevent $net2 to saturate the interface (unless I'm plugin ALTQ
> of course, which I'd like to avoid).
>
>> -Matthew
>>
>> On 10/8/2019 8:48 AM, Julien Cigar wrote:
>>> Hello,
>>>
>>> I'd like to NAT outbound traffic from two different private networks
>>> through two different interfaces, with CARP on top. I have 4 public IPS
>>> available (193.x.x.89, 193.x.x.90, 193.x.x.91, 193.x.x.92).
>>>
>>> I have two redundant router/firewall running FreeBSD 12 with CARP and
>>> PF with the following: (1) which works well, but all traffic
>>> goes through the same interface.
>>>
>>> So I'd like to switch to something like (2), which will not work (lines
>>> 5 and 13 are not valid) and I'm wondering if I could use something like
>>> (3) ..?
>>>
>>> Thank you!
>>> Julien
>>>
>>> (1) https://gist.github.com/silenius/4f6173a9b6690292c2174ab3bb89d292
>>> (2) https://gist.github.com/silenius/da9be7e74e9861fa55f927d194e3e410
>>> (3) https://gist.github.com/silenius/b237565b0d181248ff80ea296e5537db
>>>
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can you draw it?