Current implementation of ALTQ and also PF is not dynamic. You apply changes
(e.g. new Queue parameters), you basically have to flush all the queues and reload.
That means, "pfctl -Fall" followed by "pfctl -f new-pf.conf"

You can achieve this by creating a script that will called from cron. Be aware of
the effect when flushing all the rules though. That would drop existing VPN
sessions.

I am not sure if there is an on-going project to support dynamic ALTQ/PF.

Reinhold wrote:
Hi

I was asked to limit the amount of bandwidth being used by our openvpn
connections during our office hours and then allow full access after
hours.

In my current set up I'm using pf that does load balancing over 2 adsl
lines on a FreeBSD 7-STABLE system, I'm using mpd5 for dialing in and
establish the connections with our ISP.

I'm in the process of implementing HFSC to see if I can improve our
bandwidth usage, I tried PRIQ but ended up loosing packets and the over
all performance decreased to a point where I had to disable it.

How can I go about setting up a limit for a certain time period on the
amount of bandwidth being used by openvpn?

Thanks
Reinhold

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