[j-nsp] SRX, UDP traffic, routing asymmetry

Per Westerlund p1 at westerlund.se
Thu Dec 6 12:24:05 EST 2012


This is a flow mode configuration (Juniper calls it "router mode", not "packet mode"), that emulates pure packet mode by allowing all packets to start a flow, and having a default permit-all for all flows.

The sole reason for having this is to enable flow-mode things like IPsec and NAT at the same time as having almost the same behavior as pure packet mode.

I am working on another mail or two with examples of "selective packet mode" that I believe might solve Dale's original problem (and perhaps his quest for pure routing with IPsec).

/Per

6 dec 2012 kl. 14:15 skrev Phil Mayers:

> On 06/12/12 10:58, Per Westerlund wrote:
>> To follow up my own post (even more to follow), here is the config you use
>> on a J-series router to put it in router-mode. Nothing magic, just some
>> configuration. This will work with SRX as well, there is nothing J-series
>> specific in here. This config is found in
>> /etc/config/jsr-series-routermode-factory.conf, and the box I picked it from
>> was running Junos 10.2R4.8
> 
> Is this *actually* in router mode, or is it just in a permit-all flow mode?
> 
> In particularly, you seem to be missing a "packet-mode" statement for IPv4 or MPLS (which also disables flow mode for IPv4)
> 
> What does "show security flow status" say?
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