Isn't there supposed to be a netmask?  "/32" for 255.255.255.255.

Shooting from the hip (and I have no way of testing right now):
FROM all vms TO IP 255.255.255.255/32 BLOCK udp PORTS 1-65535


----- Original Message -----
From: "Stefan" <[email protected]>
To: "smartos-discuss" <[email protected]>
Sent: Wednesday, June 20, 2018 5:06:18 AM
Subject: Re: [smartos-discuss] disable UDP broadcasts

Any idea how to stop VMs from broadcasting?

Kind Regards,
Stefan


Am 06.06.2018 19:57, schrieb Stefan:
> Hi!
> 
> From any VM one can generate UDP broadcasts:
> 
>    # socat - UDP-DATAGRAM:255.255.255.255:24000,broadcast
> 
> How do I stop a vm from emitting UDP broadcasts? Firewalling to IP
> 255.255.255.255 does not work:
> 
>     "rule": "FROM all vms TO IP 255.255.255.255 BLOCK udp PORTS 
> 1-65535",
> 
>    # fwadm add -f stop-udp-bcast
>    IPv4 address "255.255.255.255" is invalid
> 
> Kind Regards,
> Stefan
 
 


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