Hi Keith,

On Sat, Oct 31, 2020 at 08:27:34PM -0600, Keith wrote:
> I have scanned 3GPP documents for info on the GGSN IP network facing
> side, IIUC how the GGSN responds there is "out of scope" 

I'd agree to that.

> - I'm specifically wondering about sending ICMP host unreachable messages in
> response to packets for IPs that are not currently active in the pool.

makes sense.

> If so I would try to clean it up and submit to code review.

please do, thanks!

> Also if in agreement, would it be worth making it switchable via a vty
> param? I am thinking of where one might not want the IP space to be
> probable, although I would assume that kind of thing is best left to the
> local firewall implementation.

I think the GGSN "function"  should not implement firewall policy.

However, given that generating and discarding a potentially very large
amount of ICMP host unreachable messages can consume a significant amount
of resources, I guess a vty option might make sense.

-- 
- Harald Welte <[email protected]>            http://laforge.gnumonks.org/
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"Privacy in residential applications is a desirable marketing option."
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