Showing results for 
Search instead for 
Did you mean: 
Level 7

Setting Up Throttling in MWG7


I am just trying to set up the throttling feature described in this whitepaper:

I created a very simple rule, and deactivated all other rule sets ...


Because I just want to test this feature I tell the Web Gateway to throttle all connections to 20kbit/s.

But when I start a download (openoffice for example) I get a much higher download rate:

I get 359KB/s


Has anybody an idea, why it is not working?

Best Regards,


Message was edited by: slayer977 on 5/23/12 5:14:23 AM CDT
0 Kudos
3 Replies
Level 17

Re: Setting Up Throttling in MWG7


can you ensure the request was sent through MWG? I see no reason why the rule should not trigger. I just tried the same with my lab MWG:


And it seems to work perfectly fine:

1- von 1 Datei - Downloads_045.png

MWG applies throttling by scaling down TCP window sizes. Is there probably some low-level network device (firewall/router) around MWG that could have an effect and tries to rewrite window sizes?



0 Kudos
Level 15

Re: Setting Up Throttling in MWG7

Are you using this on a VMware using a NAT interface?

I think there is a known constraint with the NAT interface that prevents throttling from working because the VMhost modifies the packet level data...or something like that.

0 Kudos
Level 12

Re: Setting Up Throttling in MWG7

I am on  with appliances and have a Throttle.Server(10000)  on a rule that applies only to Responses and am getting throttling. 

Though, I never do get the throttling numbers to match what I enter.   As an example, a throttle of 10000 results for me in download bandwidth of around 18Mbps 

To ensure that your traffic is going through the MWG, I find Microsoft's wonderful sysinternals tcpview tool indispensible for verifying that given apps are actually paying attention to system proxy settings (assuming you're in an explicit proxy architecture).

Message was edited by: Regis  added note about tcpview  on 5/29/12 10:15:39 AM CDT
0 Kudos